When choosing a bicycle lock with alarm, security and ease of use are key considerations. The Alarm U Lock stands out as the best overall for its rugged build and reliable alarm system, while the Wireless Bike Alarm Lock by Mengshen offers remote control convenience. However, many options trade off between alarm loudness, durability, and complexity. Some locks are more suitable for urban environments, while others excel in high-theft areas. Continue reading to see how each model stacks up and which one fits your specific needs.

15
compared
9
brands
130dB
max alarm volume
Which bicycle lock with alarm should you buy?
★ Top Pick
Alarm Disc Lock
Best Overall for Versatile Anti-Theft Protection
Loud 110dB alarm effectively deters theft
See on Amazon →
Cyclists and scooter riders who prioritize remote control convenience and long-lasting rechargeable batteries
Bike Chain Lock with Alarm
Remote control for easy operation
View on Amazon →
E-bike owners and outdoor enthusiasts needing a rugged, weatherproof security solution with both audible and physical deterrence
Bike U Lock with 113dB Alarm S
Loud 113dB alarm deters theft effectively
View on Amazon →
Bicycle owners and outdoor users seeking flexible locking methods with remote control and weather resistance
Mengshen Wireless Bike Alarm L
Multiple locking options with remote and password
View on Amazon →
Motorcycle riders who want a complete security set with accessories for outdoor riding and theft deterrence
YOHOOLYO Alarm Disc Lock Motor
Loud 110dB alarm effectively deters theft
View on Amazon →
Alarm Volume — compared
Alarm Disc Lock110dB
Bike Chain Lock with Alarm110dB
Bike U Lock with 113dB Alarm S113dB
Mengshen Wireless Bike Alarm L115dB
YOHOOLYO Alarm Disc Lock Motor110dB
Bike Lock with Alarm110dB
BANGTING 4Ft Heavy Duty Bike C110dB
AKM Safe 80dB Alarm Motorcycle80dB
Bike Chain Lock with Alarm 130130dB
BANGTING 4FT Smart Alarm Bike 110dB
Mengshen Bike Lock with Remote115dB
Pros & cons at a glance
Alarm Disc Lock
✓ Loud 110dB alarm effectively deters theft
✗ Requires 6 batteries per lock, leading to frequent replacements
Bike Chain Lock with Alarm
✓ Remote control for easy operation
✗ May be bulky for some users
Bike U Lock with 113dB Alarm S
✓ Loud 113dB alarm deters theft effectively
✗ Bulkier and heavier than smaller locks
Mengshen Wireless Bike Alarm L
✓ Multiple locking options with remote and password
✗ Requires frequent battery replacements
YOHOOLYO Alarm Disc Lock Motor
✓ Loud 110dB alarm effectively deters theft
✗ Heavy weight may hinder portability
Bike Lock with Alarm
✓ High-volume 110dB alarm effectively deters theft
✗ Alarm may be too loud for quiet environments
Wsdcam 113dB Bike Alarm Wirele
✓ Adjustable vibration sensitivity and volume for personalized alerts
✗ Limited wireless range of 66 feet
BANGTING 4Ft Heavy Duty Bike C
✓ Heavy-duty manganese steel construction for high security
✗ Bulkier and heavier than shorter locks
AKM Safe 80dB Alarm Motorcycle
✓ Strong, cut-resistant manganese steel chain
✗ Alarm volume may be insufficient in noisy environments
110dB Rechargeable Bike Alarm
✓ Loud 110dB alarm effectively deters theft
✗ Requires regular charging every 1-3 months
Electric Scooter Lock with Ala
✓ Adjustable volume alarm for tailored security levels
✗ Alarm and remote rely on batteries, which require regular replacement
Bike Chain Lock with Alarm 130
✓ 130dB alarm effectively deters theft attempts
✗ Alarm may be too loud for quiet neighborhoods or early mornings
BANGTING 4FT Smart Alarm Bike
✓ Long 4-foot chain provides versatile locking options
✗ USB-C charging may be inconvenient for some users
Mengshen Bike Lock with Remote
✓ Multiple locking options via remote or password
✗ Requires regular battery replacement
Alarm U Lock for E-Bikes
✓ Motion-activated alarm effectively deters theft
✗ May be bulky and heavy for smaller bikes

Complete the kit

Under Armour Squeeze Water Bottles, 32 oz Water Bottles,...
Under Armour Squeeze Water Bottles, 32 oz Water Bottles,…
Add to your setup →
Under Armour Squeeze Water Bottles, 32 oz Water Bottles,...
Under Armour Squeeze Water Bottles, 32 oz Water Bottles,…
Add to your setup →
Owala FreeSip Insulated Stainless Steel Water Bottle with...
Owala FreeSip Insulated Stainless Steel Water Bottle with…
Add to your setup →

Key Takeaways

  • The loudness of the alarm, typically 110-130dB, is crucial for deterring thieves and alerting nearby people.
  • Durability and weatherproofing are essential, especially for bikes left outside in rain or snow.
  • Locks with remote control or adjustable sensitivity tend to offer greater convenience but may add to cost and complexity.
  • Heavy-duty chains and U-locks provide increased security but can be bulkier and harder to carry.
  • Higher-priced models often include additional features like mounting brackets and extended cables, which add value for serious users.
2
Bike Chain Lock with Alarm
Best for Remote-Controlled Convenience
1
Alarm Disc Lock
Best Overall for Versatile Anti-Theft Protection
3
Bike U Lock with 113dB Alarm S
Best for Heavy-Duty Outdoor Security

Our Top Bicycle Lock With Alarm Picks

Alarm Disc Lock, 110 dB, 7mm Pin, Reminder Cable, Waterproof, for Motorcycles and BikesAlarm Disc Lock, 110 dB, 7mm Pin, Reminder Cable, Waterproof, for Motorcycles and BikesBest Overall for Versatile Anti-Theft ProtectionAlarm Volume: 110dBMaterial: Heavy-duty steelBattery Needed: 6pcs LR44 or AG13VIEW ON AMAZONSee Our Full Breakdown
Bike Chain Lock with Alarm, Anti-Theft Security Lock for Bike, Scooter, MotorcycleBike Chain Lock with Alarm, Anti-Theft Security Lock for Bike, Scooter, MotorcycleBest for Remote-Controlled ConvenienceAlarm Volume: 110dBRemote Control: YesRechargeable: Yes, USB-CVIEW ON AMAZONSee Our Full Breakdown
Bike U Lock with 113dB Alarm System, Heavy Duty Bicycle Lock with 4ft Security Cable & Mounting Bracket, 17mm Shackle, Waterproof, Anti-Theft for Electric Bikes and ScootersBike U Lock with 113dB Alarm System, Heavy Duty Bicycle Lock with 4ft Security Cable & Mounting Bracket, 17mm Shackle, Waterproof, Anti-Theft for Electric Bikes and ScootersBest for Heavy-Duty Outdoor SecurityAlarm Volume: 113dBShackle Diameter: 17mmCable Length: 4ftVIEW ON AMAZONSee Our Full Breakdown
Mengshen Wireless Bike Alarm Lock with Remote Control, 31 Inch Cable, IP55 Waterproof, Vibration AlarmMengshen Wireless Bike Alarm Lock with Remote Control, 31 Inch Cable, IP55 Waterproof, Vibration AlarmBest for Versatile Locking with Remote ControlAlarm Volume: 115dBLocking Methods: Remote control and passwordRemote Range: 40 metersVIEW ON AMAZONSee Our Full Breakdown
YOHOOLYO Alarm Disc Lock Motorcycle Disc Brake Lock Anti-Theft Waterproof 110 dB 7mm Pin with Reminder Cable and Carry PouchYOHOOLYO Alarm Disc Lock Motorcycle Disc Brake Lock Anti-Theft Waterproof 110 dB 7mm Pin with Reminder Cable and Carry PouchBest for Motorcycle Security with AccessoriesAlarm Volume: 110dBPin Size: 7mmWaterproof: YesVIEW ON AMAZONSee Our Full Breakdown
Bike Lock with Alarm – 110dB Anti-Theft Heavy Duty Chain with Keys for Bicycle, E-Scooter, MotorcycleBike Lock with Alarm – 110dB Anti-Theft Heavy Duty Chain with Keys for Bicycle, E-Scooter, MotorcycleBest Overall for Heavy-Duty Security and VersatilityAlarm Volume: 110dBChain Length: 4 feetChain Diameter: 8mmVIEW ON AMAZONSee Our Full Breakdown
Wsdcam 113dB Bike Alarm Wireless Vibration Motion Sensor Waterproof Motorcycle Alarm with RemoteWsdcam 113dB Bike Alarm Wireless Vibration Motion Sensor Waterproof Motorcycle Alarm with RemoteBest for Customization and Ease of UseSuitable for: Bikes, Electric Bikes, Motorcycles, ScootersVibration sensitivity: 7 levels adjustableVolume: 3 levels adjustableVIEW ON AMAZONSee Our Full Breakdown
BANGTING 4Ft Heavy Duty Bike Chain Lock with 110dB Alarm, Waterproof Security Lock for Bicycle, Electric Bike, Scooter, Motorcycle, Door, Gate, FenceBANGTING 4Ft Heavy Duty Bike Chain Lock with 110dB Alarm, Waterproof Security Lock for Bicycle, Electric Bike, Scooter, Motorcycle, Door, Gate, FenceBest for Versatile Outdoor Security with Long ChainLength: 4 feetMaterial: Manganese steelAlarm Volume: 110dBVIEW ON AMAZONSee Our Full Breakdown
AKM Safe 80dB Alarm Motorcycle Chain Lock, 4ft/120cm, Heavy Duty, Weatherproof, 3 KeysAKM Safe 80dB Alarm Motorcycle Chain Lock, 4ft/120cm, Heavy Duty, Weatherproof, 3 KeysBest Heavy-Duty Chain Lock with Moderate Alarm VolumeLength: 1200mm / 47inWidth: 38mm / 1.5inThickness: 10mm / 0.4inVIEW ON AMAZONSee Our Full Breakdown
110dB Rechargeable Bike Alarm with Remote and Adjustable Sensitivity110dB Rechargeable Bike Alarm with Remote and Adjustable SensitivityBest for Customizable, Long-Lasting Bike SecurityDecibel Level: 110dBSensitivity Levels: 7Remote Range: 100mVIEW ON AMAZONSee Our Full Breakdown
Electric Scooter Lock with Alarm, Waterproof Heavy-Duty Bike Chain, 37 inchesElectric Scooter Lock with Alarm, Waterproof Heavy-Duty Bike Chain, 37 inchesBest Overall for Versatile Weather and E-Scooter SecurityAlarm Volume Levels: 7Chain Length: 37 inchesChain Thickness: 3 cmVIEW ON AMAZONSee Our Full Breakdown
Bike Chain Lock with Alarm 130dB, Heavy Duty Motorcycle Locks Anti-Theft 3.3FT, 8mm Hardened Steel Chain with Mini U Lock for Bicycle, Motorcycle, Scooter, GateBike Chain Lock with Alarm 130dB, Heavy Duty Motorcycle Locks Anti-Theft 3.3FT, 8mm Hardened Steel Chain with Mini U Lock for Bicycle, Motorcycle, Scooter, GateBest for Heavy-Duty Security and High Decibel DeterrenceAlarm Volume: 130dBChain Length: 3.3 feetChain Diameter: 8mmVIEW ON AMAZONSee Our Full Breakdown
BANGTING 4FT Smart Alarm Bike Lock with Remote Control and 8mm ChainBANGTING 4FT Smart Alarm Bike Lock with Remote Control and 8mm ChainBest for Remote Convenience and Weather ResistanceLength: 4ft / 1.2mAlarm Volume: 110dBChain Thickness: 8mmVIEW ON AMAZONSee Our Full Breakdown
Mengshen Bike Lock with Remote Control Anti-Theft Vibration Alarm, 31 Inch Cable, IP55 WaterproofMengshen Bike Lock with Remote Control Anti-Theft Vibration Alarm, 31 Inch Cable, IP55 WaterproofBest for Multi-Method Locking and Vibration DetectionCable Length: 31 inchesVibration Alarm: YesWaterproof Rating: IP55VIEW ON AMAZONSee Our Full Breakdown
Alarm U Lock for E-Bikes — 16mm Hardened Steel, Motion-Activated Alarm, Fits Fat Tire E-Bikes, 3 Keys, Weatherproof, RedAlarm U Lock for E-Bikes — 16mm Hardened Steel, Motion-Activated Alarm, Fits Fat Tire E-Bikes, 3 Keys, Weatherproof, RedBest for Fat Tire E-Bikes and Larger Vehicles in Harsh ConditionsShackle opening: 5″ wide × 6″ tallOverall width: 7″Overall height: 9″VIEW ON AMAZONSee Our Full Breakdown

More Details on Our Top Picks

  1. Alarm Disc Lock, 110 dB, 7mm Pin, Reminder Cable, Waterproof, for Motorcycles and Bikes

    Alarm Disc Lock, 110 dB, 7mm Pin, Reminder Cable, Waterproof, for Motorcycles and Bikes

    Best Overall for Versatile Anti-Theft Protection

    View on Amazon

    This alarm disc lock stands out for its effective combination of loud 110dB deterrence and waterproof steel construction, making it suitable for a range of vehicles with disc brakes. Compared with the YOHOOLYO model, it offers a more straightforward one-press operation but requires six batteries, which could mean more frequent replacements. Its waterproof design and compatibility with bikes, scooters, and motorcycles give it broad appeal, yet the need for multiple batteries and potential alarm loudness might be drawbacks for some users.

    Pros:
    • Loud 110dB alarm effectively deters theft
    • Heavy-duty waterproof steel construction
    • Easy one-press operation
    Cons:
    • Requires 6 batteries per lock, leading to frequent replacements
    • Limited to disc brakes up to 6mm thickness

    Best for: Motorcycle and bike owners seeking a reliable, weatherproof disc lock with a loud alarm for outdoor protection

    Not ideal for: Users with limited space or those preferring battery-free options, since it requires multiple batteries and is bulky

    • Alarm Volume:110dB
    • Material:Heavy-duty steel
    • Battery Needed:6pcs LR44 or AG13
    • Pin Diameter:7mm
    • Application:Motorcycles, bicycles, scooters
    • Waterproof:Yes
    Our verdict
    “Best suited for riders who want a durable, loud alarm lock with straightforward operation and weather resistance.”
  2. Bike Chain Lock with Alarm, Anti-Theft Security Lock for Bike, Scooter, Motorcycle

    Bike Chain Lock with Alarm, Anti-Theft Security Lock for Bike, Scooter, Motorcycle

    Best for Remote-Controlled Convenience

    View on Amazon

    This chain lock excels with its 110dB alarm featuring adjustable volume and sensitivity, paired with remote control for effortless locking and unlocking. It surpasses the Mengshen model in remote control convenience, with a rechargeable USB-C battery that offers up to 60 days of standby. However, its size and bulk may be cumbersome for some users, and sensitivity settings might need frequent adjustments depending on the environment, making it less ideal for those seeking a compact solution.

    Pros:
    • Remote control for easy operation
    • Rechargeable with long standby time
    • Waterproof and impact-resistant design
    Cons:
    • May be bulky for some users
    • Alarm sensitivity may require adjustment

    Best for: Cyclists and scooter riders who prioritize remote control convenience and long-lasting rechargeable batteries

    Not ideal for: Users needing a lightweight, compact lock for quick daily use or those sensitive to bulk

    • Alarm Volume:110dB
    • Remote Control:Yes
    • Rechargeable:Yes, USB-C
    • Standby Time:Up to 60 days
    • Length:4 ft
    • Waterproof:Yes
    Our verdict
    “Ideal for riders who want remote convenience paired with robust waterproof security and long battery life.”
  3. Bike U Lock with 113dB Alarm System, Heavy Duty Bicycle Lock with 4ft Security Cable & Mounting Bracket, 17mm Shackle, Waterproof, Anti-Theft for Electric Bikes and Scooters

    Bike U Lock with 113dB Alarm System, Heavy Duty Bicycle Lock with 4ft Security Cable & Mounting Bracket, 17mm Shackle, Waterproof, Anti-Theft for Electric Bikes and Scooters

    Best for Heavy-Duty Outdoor Security

    View on Amazon

    This U lock combines a powerful 113dB alarm with a heavy-duty 17mm shackle and weatherproof features, making it ideal for securing e-bikes and scooters outdoors. Compared to the Alarm Disc Lock, it offers a more physical barrier with its thick shackle and integrated security cable, though its bulkier design reduces portability. The weather resistance and inclusion of a mounting bracket enhance outdoor durability, but the loud alarm and weight could be less appealing for daily commuters seeking lightweight options.

    Pros:
    • Loud 113dB alarm deters theft effectively
    • Heavy-duty 17mm shackle resists cutting
    • Weather-resistant with mounting options
    Cons:
    • Bulkier and heavier than smaller locks
    • Alarm might be too loud for sensitive environments

    Best for: E-bike owners and outdoor enthusiasts needing a rugged, weatherproof security solution with both audible and physical deterrence

    Not ideal for: Urban riders who prefer lightweight, portable locks or those sensitive to loud alarms in quiet neighborhoods

    • Alarm Volume:113dB
    • Shackle Diameter:17mm
    • Cable Length:4ft
    • Waterproof:IP65
    • Included Keys:3
    Our verdict
    “Best for securing larger e-bikes or scooters outdoors with heavy-duty physical and audible security features.”
  4. Mengshen Wireless Bike Alarm Lock with Remote Control, 31 Inch Cable, IP55 Waterproof, Vibration Alarm

    Mengshen Wireless Bike Alarm Lock with Remote Control, 31 Inch Cable, IP55 Waterproof, Vibration Alarm

    Best for Versatile Locking with Remote Control

    View on Amazon

    This lock stands out for its dual locking options—remote control or password—along with a loud 115dB alarm. It’s well-suited for users who want flexible access, thanks to its 40-meter remote range and programmable remotes. Compared to the Alarm Chain Lock, it offers more versatile locking methods and a longer remote range, though its 31-inch cable length might limit certain applications. Its waterproof IP55 rating and vibration alarm make it a good outdoor choice, but frequent battery replacements and the loud alarm could be downsides for some.

    Pros:
    • Multiple locking options with remote and password
    • Loud 115dB alarm deters theft effectively
    • Weatherproof and durable for outdoor use
    Cons:
    • Requires frequent battery replacements
    • Cable length may not suit all locking needs

    Best for: Bicycle owners and outdoor users seeking flexible locking methods with remote control and weather resistance

    Not ideal for: Those needing a compact, lightweight lock or who prefer non-remote options for simplicity

    • Alarm Volume:115dB
    • Locking Methods:Remote control and password
    • Remote Range:40 meters
    • Waterproof Rating:IP55
    • Cable Diameter:10mm
    Our verdict
    “Perfect for users who want flexible, remote-controlled security with strong alarm deterrence outdoors.”
  5. YOHOOLYO Alarm Disc Lock Motorcycle Disc Brake Lock Anti-Theft Waterproof 110 dB 7mm Pin with Reminder Cable and Carry Pouch

    YOHOOLYO Alarm Disc Lock Motorcycle Disc Brake Lock Anti-Theft Waterproof 110 dB 7mm Pin with Reminder Cable and Carry Pouch

    Best for Motorcycle Security with Accessories

    View on Amazon

    This heavy-duty motorcycle disc lock offers a loud 110dB alarm and includes useful accessories such as a reminder cable and carry pouch, making it a comprehensive security package. It’s comparable to the Alarm Disc Lock but adds extra convenience with its included carry pouch and multiple keys. Its waterproof design and 360-degree adjustable pin improve outdoor resilience, though the weight and loud alarm might be drawbacks for those who prioritize portability or quiet environments. Battery life could also become an issue with frequent replacements.

    Pros:
    • Loud 110dB alarm effectively deters theft
    • Waterproof and rust-resistant design
    • Includes reminder cable and carry pouch
    Cons:
    • Heavy weight may hinder portability
    • Battery life may require frequent replacement

    Best for: Motorcycle riders who want a complete security set with accessories for outdoor riding and theft deterrence

    Not ideal for: Those seeking a lightweight or ultra-compact lock or who prefer minimal accessories

    • Alarm Volume:110dB
    • Pin Size:7mm
    • Waterproof:Yes
    • Included Accessories:Reminder cable, carry pouch, keys
    Our verdict
    “Ideal for motorcycle owners who want a rugged, all-in-one security solution with accessories for outdoor use.”
  6. Bike Lock with Alarm – 110dB Anti-Theft Heavy Duty Chain with Keys for Bicycle, E-Scooter, Motorcycle

    Bike Lock with Alarm – 110dB Anti-Theft Heavy Duty Chain with Keys for Bicycle, E-Scooter, Motorcycle

    Best Overall for Heavy-Duty Security and Versatility

    View on Amazon

    This lock stands out for combining a formidable physical barrier with a loud 110dB alarm, making it ideal for securing high-value bikes and scooters in exposed areas. Its hardened manganese steel chain and drill-resistant lock head provide a level of physical deterrence that surpasses lighter options like the WSdcam 113dB Bike Alarm. The inclusion of remote controls, spare keys, and waterproofing ensures reliable operation in various weather conditions. However, the alarm’s volume might be excessive for quiet neighborhoods or indoor storage, and its bulk can complicate transport. The battery life up to two months depends on use, requiring regular charging. Overall, this pick is perfect for bike owners prioritizing maximum security in outdoor environments, accepting the tradeoff of size and possibly loud alarms.

    Pros:
    • High-volume 110dB alarm effectively deters theft
    • Heavy-duty, drill-resistant manganese steel chain and lock
    • Waterproof design suitable for all weather conditions
    • Includes remote controls and spare keys for convenience
    Cons:
    • Alarm may be too loud for quiet environments
    • Relatively bulky and heavy for casual use
    • Battery life depends on frequency of use, may require frequent recharging

    Best for: Owners of high-value bicycles or scooters needing robust, all-weather protection

    Not ideal for: Casual riders or those with limited storage space who prefer lightweight, less bulky locks

    • Alarm Volume:110dB
    • Chain Length:4 feet
    • Chain Diameter:8mm
    • Material:Hardened manganese steel
    • Waterproof Rating:IP65
    • Battery Life:Up to 2 months
    Our verdict
    “This lock is ideal for those seeking maximum physical and electronic security, even if it means sacrificing portability.”
  7. Wsdcam 113dB Bike Alarm Wireless Vibration Motion Sensor Waterproof Motorcycle Alarm with Remote

    Wsdcam 113dB Bike Alarm Wireless Vibration Motion Sensor Waterproof Motorcycle Alarm with Remote

    Best for Customization and Ease of Use

    View on Amazon

    Compared with heavier, chain-based options, the Wsdcam 113dB Bike Alarm offers a wireless, vibration-sensitive solution that excels in ease of installation and configuration. Its adjustable sensitivity and volume allow tailored alerts, making it suitable for urban environments where false alarms are a concern, unlike the more aggressive Bike Lock with Alarm – 110dB Heavy Duty Chain. The remote control with a vehicle search function adds convenience for locating your bike in crowded parking lots. However, its limited 66-foot wireless range and reliance on batteries can be drawbacks, especially for users needing long-range security or who prefer wired setups. This model is better suited for riders who value quick setup and adjustable alerts over maximum physical strength.

    Pros:
    • Adjustable vibration sensitivity and volume for personalized alerts
    • Waterproof and durable design for outdoor conditions
    • Remote control with vehicle search function
    Cons:
    • Limited wireless range of 66 feet
    • Requires batteries, needing periodic replacements
    • Potential false alarms in noisy areas

    Best for: Urban commuters or casual riders seeking customizable, wireless protection

    Not ideal for: Riders in very noisy environments or those needing long-range security without frequent battery changes

    • Suitable for:Bikes, Electric Bikes, Motorcycles, Scooters
    • Vibration sensitivity:7 levels adjustable
    • Volume:3 levels adjustable
    • Waterproof rating:IP55
    • Wireless range:66 ft
    Our verdict
    “This alarm suits riders seeking flexible, wireless security with easy customization, accepting some limitations in range and false alarm risk.”
  8. BANGTING 4Ft Heavy Duty Bike Chain Lock with 110dB Alarm, Waterproof Security Lock for Bicycle, Electric Bike, Scooter, Motorcycle, Door, Gate, Fence

    BANGTING 4Ft Heavy Duty Bike Chain Lock with 110dB Alarm, Waterproof Security Lock for Bicycle, Electric Bike, Scooter, Motorcycle, Door, Gate, Fence

    Best for Versatile Outdoor Security with Long Chain

    View on Amazon

    This lock offers a 4-foot manganese steel chain combined with a 110dB alarm, making it suitable for securing larger or multiple items outdoors. Its versatility extends beyond bikes, fitting gates or fences, unlike the narrower AKM Safe 80dB Alarm Motorcycle Chain Lock. The waterproof IP65 rating and inclusion of remote controls, keys, and a storage bag enhance its practicality. The main tradeoff is its size and weight, which can be cumbersome for everyday carrying, and the alarm’s volume might be excessive in residential areas. The chain length may also be insufficient for some locking setups, requiring careful measurement before purchase.

    Pros:
    • Heavy-duty manganese steel construction for high security
    • Long 4-foot chain for versatile locking options
    • Waterproof and includes remote controls and keys
    Cons:
    • Bulkier and heavier than shorter locks
    • Alarm may be too loud for quiet environments
    • Chain length might not suit all locking needs

    Best for: Owners needing a long, heavy-duty lock for outdoor, multi-use security

    Not ideal for: Cyclists requiring lightweight, portable locks for daily commuting

    • Length:4 feet
    • Material:Manganese steel
    • Alarm Volume:110dB
    • Waterproof Standard:IP65
    • Includes:Keys, remote controls, silicone cover, storage bag, USB-C charging cable
    Our verdict
    “This lock is best for users who need a durable, long chain for outdoor multi-application security despite its weight and size.”
  9. AKM Safe 80dB Alarm Motorcycle Chain Lock, 4ft/120cm, Heavy Duty, Weatherproof, 3 Keys

    AKM Safe 80dB Alarm Motorcycle Chain Lock, 4ft/120cm, Heavy Duty, Weatherproof, 3 Keys

    Best Heavy-Duty Chain Lock with Moderate Alarm Volume

    View on Amazon

    Compared to the 110dB models, the AKM Safe 80dB Alarm Chain Lock offers a more moderate alarm volume combined with a strong, cut-resistant manganese steel chain. Its weatherproof design and three keys make it a reliable choice for motorcycle owners who prioritize durability and longer battery life—approximately five months—over maximum alarm volume. While the 80dB alarm may be less deterrent in loud environments, its strength and weatherproof features make it ideal for riders in all weather conditions. The heavier weight, about 6.6 pounds, could be cumbersome for daily handling, especially in urban settings where portability matters.

    Pros:
    • Strong, cut-resistant manganese steel chain
    • Weatherproof and includes three keys
    • Battery life of around five months reduces need for frequent replacements
    Cons:
    • Alarm volume may be insufficient in noisy environments
    • Heavy weight can be cumbersome for daily handling
    • Lower alarm volume might reduce deterrence effectiveness

    Best for: Motorcycle riders seeking a durable, weatherproof lock with long-lasting batteries

    Not ideal for: Casual cyclists or those who want the loudest possible alarm for high-theft areas

    • Length:1200mm / 47in
    • Width:38mm / 1.5in
    • Thickness:10mm / 0.4in
    • Weight:6.6 lbs / 3 kg
    • Alarm Volume:80dB
    • Battery Life:5 months
    Our verdict
    “This lock suits riders who prioritize durability and long battery life, accepting a quieter alarm and added weight.”
  10. 110dB Rechargeable Bike Alarm with Remote and Adjustable Sensitivity

    110dB Rechargeable Bike Alarm with Remote and Adjustable Sensitivity

    Best for Customizable, Long-Lasting Bike Security

    View on Amazon

    This alarm combines a powerful 110dB sound with adjustable sensitivity and volume, making it highly adaptable for different environments. Its remote control with up to 100m range and weather-resistant IP65 rating make it a flexible choice for many bikes, especially when quick activation or deactivation is needed, unlike the fixed-volume alarms. The rechargeable battery, lasting 1-3 months per charge, minimizes ongoing costs. However, frequent charging and installation effort may be downsides for users seeking a set-and-forget solution. Its limited remote control capacity—up to 8 remotes—may also be a consideration in multi-bike setups. Overall, it’s best for riders who want tailored security with long-term battery use.

    Pros:
    • Loud 110dB alarm effectively deters theft
    • Adjustable sensitivity and volume for personalized alerts
    • Weather-resistant and rechargeable for long-term use
    • Remote control with up to 100m range
    Cons:
    • Requires regular charging every 1-3 months
    • Installation may be more involved than plug-and-play models
    • Limited to 8 remote controls in multi-bike setups

    Best for: Bike owners desiring customizable, long-term security with remote operation

    Not ideal for: Riders needing a simple, one-button alarm without regular charging or those with multiple bikes exceeding 8 remote controls

    • Decibel Level:110dB
    • Sensitivity Levels:7
    • Remote Range:100m
    • Battery:4.2V 700mAh lithium rechargeable
    • Weather Resistance:IP65
    • Charging Time:3 hours
    • Battery Life:1-3 months
    Our verdict
    “This alarm excels for riders seeking customizable, long-lasting security with remote convenience, accepting some maintenance effort.”
  11. Electric Scooter Lock with Alarm, Waterproof Heavy-Duty Bike Chain, 37 inches

    Electric Scooter Lock with Alarm, Waterproof Heavy-Duty Bike Chain, 37 inches

    Best Overall for Versatile Weather and E-Scooter Security

    View on Amazon

    This heavy-duty lock excels in its versatility, combining a waterproof alloy steel chain with a remote-controlled alarm and adjustable volume levels. Compared with the Bike Chain Lock with Alarm 130dB, it offers more weather resistance thanks to its waterproof bag, making it ideal for outdoor environments. Its 37-inch chain is sufficient for most e-scooters and bikes but might fall short for larger motorcycles. The remote control adds convenience, although it depends on batteries, and the alarm’s volume is customizable, which can be a plus or a drawback depending on user preference.

    Pros:
    • Adjustable volume alarm for tailored security levels
    • Remote control simplifies locking and unlocking
    • Heavy alloy steel resists cutting and weather damage
    • Waterproof storage bag for protection and organization
    Cons:
    • Alarm and remote rely on batteries, which require regular replacement
    • Chain length may be insufficient for larger bikes or motorcycles

    Best for: E-scooter riders and urban cyclists who need weatherproof security with remote operation

    Not ideal for: Motorcyclists needing longer, more robust chains or higher security levels

    • Alarm Volume Levels:7
    • Chain Length:37 inches
    • Chain Thickness:3 cm
    • Material:Alloy steel
    • Waterproof Bag:Yes
    • Includes:Alarm lock, 3 keys, remote, waterproof bag
    Our verdict
    “This lock offers a versatile, weather-resistant solution perfect for e-scooter owners who value remote control and customizable alarms.”
  12. Bike Chain Lock with Alarm 130dB, Heavy Duty Motorcycle Locks Anti-Theft 3.3FT, 8mm Hardened Steel Chain with Mini U Lock for Bicycle, Motorcycle, Scooter, Gate

    Bike Chain Lock with Alarm 130dB, Heavy Duty Motorcycle Locks Anti-Theft 3.3FT, 8mm Hardened Steel Chain with Mini U Lock for Bicycle, Motorcycle, Scooter, Gate

    Best for Heavy-Duty Security and High Decibel Deterrence

    View on Amazon

    This model stands out for its powerful 130dB alarm and rugged construction, making it a strong deterrent for theft. It surpasses the BANGTING 4FT Smart Alarm Bike Lock in sheer alarm volume, which is ideal for high-theft risk areas. The 8mm hardened steel chain and rust-resistant features ensure durability outdoors, though its 3.3-foot length can be limiting for larger bikes or multiple locking points. Its heavy weight (over half a kilogram) adds security but diminishes portability, so it’s best for stationary locking rather than frequent carrying.

    Pros:
    • 130dB alarm effectively deters theft attempts
    • Heavy-duty, cut-resistant steel construction
    • Waterproof and rust-resistant for outdoor durability
    • Multiple keys enhance security
    Cons:
    • Alarm may be too loud for quiet neighborhoods or early mornings
    • Heavy weight reduces ease of transport

    Best for: Motorcycle owners and cyclists in high-theft zones needing maximum loud deterrence and tough materials

    Not ideal for: Casual cyclists or those needing lightweight, portable locks for quick stops

    • Alarm Volume:130dB
    • Chain Length:3.3 feet
    • Chain Diameter:8mm
    • Lock Material:Hardened Steel
    • Waterproof Rating:IP66
    • Weight:519g
    • Number of Keys:3
    Our verdict
    “This lock delivers extreme sound and strength for riders who prioritize high security and are less concerned about portability.”
  13. BANGTING 4FT Smart Alarm Bike Lock with Remote Control and 8mm Chain

    BANGTING 4FT Smart Alarm Bike Lock with Remote Control and 8mm Chain

    Best for Remote Convenience and Weather Resistance

    View on Amazon

    This pick makes the most sense for outdoor enthusiasts seeking a longer chain with remote control. Its 4-foot length offers more flexibility than shorter options like the Electric Scooter Lock with Alarm, making it suitable for larger bikes or multiple locking points. The 110dB alarm is loud enough to deter most thieves, and its IP65 rating means it handles weather well. Unlike the heavier 130dB models, it balances security with portability, although the USB-C charging may be less familiar for some users. Its weather-resistant design makes it a good choice for riders who face diverse conditions.

    Pros:
    • Long 4-foot chain provides versatile locking options
    • Remote control and key access offer flexible security
    • Weatherproof design with IP65 rating
    • Durable, drill-resistant chain and lock body
    Cons:
    • USB-C charging may be inconvenient for some users
    • Alarm at 110dB may be too quiet for certain high-risk areas

    Best for: Bicycle and e-bike owners needing longer, weatherproof locks with remote control features

    Not ideal for: Riders who need the highest decibel alarm or ultra-lightweight options

    • Length:4ft / 1.2m
    • Alarm Volume:110dB
    • Chain Thickness:8mm
    • Material:Hardened manganese steel and zinc alloy
    • Water Resistance:IP65
    • Charging:USB-C
    Our verdict
    “This lock offers extended length and weatherproof features, ideal for outdoor riders who want remote convenience without the bulk of ultra-loud alarms.”
  14. Mengshen Bike Lock with Remote Control Anti-Theft Vibration Alarm, 31 Inch Cable, IP55 Waterproof

    Mengshen Bike Lock with Remote Control Anti-Theft Vibration Alarm, 31 Inch Cable, IP55 Waterproof

    Best for Multi-Method Locking and Vibration Detection

    View on Amazon

    This lock combines remote control with a vibration-activated alarm, offering flexible security options. The 31-inch cable length is suitable for securing multiple items or larger bikes like fat tire e-bikes, although it’s shorter than some others like the Bike Chain Lock with Alarm 130dB. Its 115dB alarm strikes a balance between effective deterrence and user comfort, with IP55 waterproofing for outdoor resilience. The vibration sensor is a useful feature for tamper alerts, but the need for AAA batteries and limited remote range (40 meters) could be drawbacks for some.

    Pros:
    • Multiple locking options via remote or password
    • Loud 115dB alarm deters theft effectively
    • Waterproof and durable for outdoor use
    • Remote can manage multiple locks
    Cons:
    • Requires regular battery replacement
    • Remote range may be limited in complex environments

    Best for: Bicyclists and fat tire e-bike riders who want versatile locking options with tamper alerts

    Not ideal for: Users needing the loudest alarms or those with very large locking needs

    • Cable Length:31 inches
    • Vibration Alarm:Yes
    • Waterproof Rating:IP55
    • Locking Method:Remote control and password
    • Alarm Volume:115dB
    • Battery:3 AAA batteries
    • Remote Control Range:40 meters
    Our verdict
    “This lock suits riders seeking multi-method security with vibration alerts in a weather-resistant design, though it’s less suited for high-noise or long-range needs.”
  15. Alarm U Lock for E-Bikes — 16mm Hardened Steel, Motion-Activated Alarm, Fits Fat Tire E-Bikes, 3 Keys, Weatherproof, Red

    Alarm U Lock for E-Bikes — 16mm Hardened Steel, Motion-Activated Alarm, Fits Fat Tire E-Bikes, 3 Keys, Weatherproof, Red

    Best for Fat Tire E-Bikes and Larger Vehicles in Harsh Conditions

    View on Amazon

    This alarm U lock is specifically designed for fat tire e-bikes, with a 16mm hardened steel shackle and a motion sensor that triggers an alarm upon tampering. Compared to smaller, less rugged options, it offers a more robust fit for larger bikes and tough conditions, making it ideal for riders who need a weatherproof, secure solution. Its rubber-coated shackle prevents scratches, and the alarm’s motion activation helps deter theft without constant alarm noise. However, its bulkiness may be a concern for smaller bikes, and users must measure carefully to ensure fit.

    Pros:
    • Motion-activated alarm effectively deters theft
    • Designed to fit fat tire e-bikes and larger vehicles
    • Weatherproof and corrosion-resistant
    • Rubber-coated shackle prevents scratches
    Cons:
    • May be bulky and heavy for smaller bikes
    • Proper measurement needed to ensure fit
    • Alarm sound volume not specified

    Best for: Fat tire e-bike owners and larger vehicle riders seeking weatherproof, motion-activated security

    Not ideal for: Owners of small bikes or those who require lightweight locks for frequent transport

    • Shackle opening:5″ wide × 6″ tall
    • Overall width:7″
    • Overall height:9″
    • Weight:3.2 lb
    • Color options:Red, Black
    Our verdict
    “This lock provides high security tailored for large, rugged bikes in all weather conditions, though its size may be less suitable for smaller bikes or portability needs.”
bicycle lock with alarm
What makes a great bicycle lock with alarm
1
Alarm Loudness and Effectiveness
The alarm’s decibel level directly impacts its effectiveness in scaring off thieves and attracting attention.
2
Build Quality and Weather Resistance
Durability matters when your bike is exposed to rain, snow, or dust.
3
Ease of Use and Remote Features
Remote control operation and adjustable sensitivity settings can greatly enhance user convenience.
4
Size, Weight, and Portability
The practicality of carrying or mounting the lock depends on its size and weight.
How to choose your bicycle lock with alarm
1
How we picked
The products in this roundup were selected based on a combination of performance, build quality, and user convenience.
2
Alarm Loudness and Effectiveness
The alarm’s decibel level directly impacts its effectiveness in scaring off thieves and attracting attention.
3
Build Quality and Weather Resistance
Durability matters when your bike is exposed to rain, snow, or dust.
4
Ease of Use and Remote Features
Remote control operation and adjustable sensitivity settings can greatly enhance user convenience.
5
Size, Weight, and Portability
The practicality of carrying or mounting the lock depends on its size and weight.
Vetted bicycle lock with alarm ·
The best bicycle lock with alarm, compared
★ Winner Alarm Disc Lock
Best Overall for Versatile Anti-Theft Protection
15compared
130dBtop alarm volume

How We Picked

The products in this roundup were selected based on a combination of performance, build quality, and user convenience. Priority was given to alarm loudness, waterproofing, and security features like hardened steel or sturdy shackles. We also considered ease of installation, battery life, and remote control capabilities. Products were ranked to balance value and premium features, aiming to recommend options suitable for different types of bike owners—from casual riders to serious commuters.
Everyday → specialist
Everyday & valuePremium & specialist
Which bicycle lock with alarm fits you?
The everyday user
All-round, reliable
The enthusiast
Premium & high-performance
The gift-giver
Looks & craftsmanship

Factors to Consider When Choosing Bicycle Lock With Alarm

Choosing the right bicycle lock with alarm involves more than just picking the loudest or most expensive model. Consider your typical environment, the level of theft risk, and how often you’ll need to carry or mount the lock. Additional features like remote control, adjustable sensitivity, and weatherproofing can make a big difference in usability. It’s also worth evaluating the lock’s weight and size, especially if you commute daily or need portability. Understanding these factors helps ensure you pick a lock that balances security, convenience, and practicality.

Alarm Loudness and Effectiveness

The alarm’s decibel level directly impacts its effectiveness in scaring off thieves and attracting attention. Most models range from 80dB to over 130dB; higher levels tend to be more intimidating. However, louder alarms may also drain batteries faster and could be more intrusive if triggered accidentally. Think about your environment; a louder alarm is better in noisy urban areas, while a moderate volume might suffice for quieter neighborhoods.

Build Quality and Weather Resistance

Durability matters when your bike is exposed to rain, snow, or dust. Look for locks with waterproof or weatherproof ratings, and consider those made from hardened steel or reinforced materials. A sturdy lock resists cutting and picking, while weatherproofing ensures the alarm and electronics won’t fail prematurely. Cheaper options may cut corners here, leading to corrosion or electrical failures over time.

Ease of Use and Remote Features

Remote control operation and adjustable sensitivity settings can greatly enhance user convenience. Remote controls allow you to arm or disarm the lock from a distance, useful if your bike is out of sight. Sensitivity adjustments prevent false alarms triggered by minor vibrations or wind. However, these features often increase the complexity and cost, so consider whether they match your riding style and security needs.

Size, Weight, and Portability

The practicality of carrying or mounting the lock depends on its size and weight. Heavy-duty chains offer high security but can be cumbersome for daily use. U-locks are compact and easier to carry, especially if they include mounting brackets. Balance your need for security with ease of transportation; overly bulky options can discourage regular use, reducing overall security.

Additional Features and Accessories

Some locks come with extra features like mounting brackets, reminder cables, or keys as backups. These can enhance convenience but may also add to the overall cost. Consider whether these extras are necessary for your setup or if they simply add complexity. For example, a lock with a reminder cable is useful if you want to prevent forgetting to turn off the alarm or secure the lock properly.

Frequently Asked Questions

How loud should a bicycle lock alarm be?

Ideally, a bicycle lock alarm should produce at least 110dB for effective deterrence, especially in noisy urban environments. Alarms in the 120-130dB range are even more intimidating, making it difficult for thieves to ignore. However, louder alarms can drain batteries faster and might be more intrusive if triggered accidentally. Select a model with adjustable volume if possible, to tailor the sound to your surroundings.

Are wireless or remote-controlled alarms more reliable?

Wireless or remote-controlled alarms offer significant convenience, allowing you to arm or disarm the lock from a distance. They tend to be more user-friendly, especially if you park your bike in a crowded or hard-to-reach area. However, they depend on batteries and electronic components, which can sometimes fail. Regular maintenance and choosing models with good reviews on battery life can mitigate these issues.

What’s the best type of lock for high-theft areas?

For high-theft areas, a heavy-duty chain lock combined with a loud alarm is often the best choice. Chains made from hardened steel are difficult to cut, and alarms add an extra layer of deterrence. U-locks with thick shackles and integrated alarms also work well, especially if they include features like weatherproofing and mounting options. Combining multiple security features can further reduce the risk of theft.

How often should I replace my bicycle lock with alarm?

Regular inspection is key; replace your lock if the alarm becomes less loud, the battery no longer holds charge, or the lock appears damaged or corroded. Most electronic components have a lifespan of a few years with proper care. If you experience frequent false alarms or difficulty arming/disarming, it might be time for an upgrade. Proper maintenance and following manufacturer guidelines extend the lifespan of these devices.

Can I use a bicycle lock with alarm for motorcycles or scooters?

Yes, many bicycle locks with alarms are suitable for motorcycles or scooters, especially those with heavy-duty chains or U-locks. Ensure the lock’s size and shackle dimensions fit your vehicle, and check if it’s rated for the increased security needs of larger vehicles. Keep in mind that larger, more robust locks may be heavier and less portable but offer better protection for high-value bikes or scooters parked in high-risk areas.

Conclusion

For casual riders or those concerned about ease of use, a lightweight U-lock with an integrated alarm, like the Alarm U Lock, makes a solid choice. Serious cyclists or commuters in high-theft zones should consider heavy-duty chains with loud alarms for maximum security. Beginners and occasional riders benefit from simple, reliable models that don’t require complex features, while experienced users may opt for premium options with remote controls and adjustable sensitivity. Ultimately, matching the lock’s features to your environment and riding habits will ensure your bike stays protected in 2026.

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