Choosing among spider-based power meters is less about chasing the longest feature list and more about matching the meter to your crank interface and riding discipline. I rank the SRAM RED/Force AXS Spider first for road riders whose 107 BCD, 8-bolt crank already fits it; the CooSpo S10 is my pick for Easton users wanting dual-sided data; and the SRAM XX Eagle Power Crankset is the clearest trail-focused option for compatible 12-speed AXS bikes.
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The main tradeoff is fit versus flexibility: several of these products work only with a particular crank or chainring system, so a strong specification sheet cannot overcome an incompatible interface. I also weigh whether you need a spider alone or a full crankset, whether dual-sided measurement matters to your training, and how much setup your current bike can accommodate.
Complete the kit
Key Takeaways
- The SRAM RED/Force AXS Spider is the most compelling road-oriented pick only if your crank has the required 107 BCD and 8-bolt interface.
- The CooSpo S10 supplies dual-sided measurement and up to 300 hours of battery life, but it is specifically for Easton 110 BCD 4-bolt cranksets.
- The SRAM XX Eagle bundle is the lineup’s mountain-bike choice, pairing a 165 mm crankset and 32T chainring with SRAM 12-speed and AXS compatibility.
- The SRAM Thread Mount Spider is a simpler AXS-compatible replacement option, with a replaceable CR2032 battery and no included display.
- The ThinkRider PP5 includes a crankset and offers broad BLE and ANT+ connectivity, but buyers should check its stated chainring pattern and crank length against their frame and drivetrain.
| SRAM RED/Force AXS Power Meter Spider – 107 BCD, 8-Bolt Crank Interface |  | Best Road Pick for Compatible AXS Cranks | Compatibility: 1x/2x SRAM AXS crank setups | BCD: 107 mm | Crank interface: 8-bolt | VIEW ON AMAZON | See Our Full Breakdown |
| CooSpo Power Meter Crankset S10, 160-172.5MM, BLE/ANT+ Cycling Power Meter for Easton 110 BCD 4-Bolt |  | Best for Easton Riders Seeking Dual-Sided Data | Compatibility: Easton 110 BCD 4-bolt cranksets | Measurement: Dual-sided power and cadence | Stated accuracy: ±1% | VIEW ON AMAZON | See Our Full Breakdown |
| SRAM XX Eagle Power Crankset 165mm, 32T, Black, Power Meter (Q174) Spider |  | Best Complete Mountain-Bike Setup | Crank length: 165 mm | Chainring: 32T | Spindle interface: DUB, 28.99 mm | VIEW ON AMAZON | See Our Full Breakdown |
| SRAM Thread Mount Power Meter Spider for Cranksets |  | Best Simple AXS Spider Replacement | Compatibility: SRAM AXS cranksets | Battery type: CR2032 | Battery life: 200 hours | VIEW ON AMAZON | See Our Full Breakdown |
| ThinkRider PP5 Spider Power Meter & Crankset, Carbon/Aluminum Options, 110 BCD 4-Bolt, BLE & ANT+, Lightweight, Road-24, 160-172.5mm, Road Bike Use |  | Best Crankset Bundle for Broad Device Pairing | Product type: Spider power meter and crankset | Material options: Carbon or aluminum | Crank length: 160–172.5 mm | VIEW ON AMAZON | See Our Full Breakdown |
| spider based power meter | Compatibility | Connectivity | Battery life |
|---|---|---|---|
| SRAM RED/Force AXS Power Meter | 1x/2x SRAM AXS crank setups | Bluetooth Low Energy and ANT+ | — |
| CooSpo Power Meter Crankset S1 | Easton 110 BCD 4-bolt cranksets | BLE and ANT+ | Up to 300 hours |
| SRAM XX Eagle Power Crankset 1 | SRAM 12-speed drivetrains and AXS | — | — |
| SRAM Thread Mount Power Meter | SRAM AXS cranksets | Bluetooth Low Energy and ANT | 200 hours |
| ThinkRider PP5 Spider Power Me | — | BLE and ANT+ | Up to 300 hours |
More Details on Our Top Picks
SRAM RED/Force AXS Power Meter Spider – 107 BCD, 8-Bolt Crank Interface
I put the SRAM RED/Force AXS Spider first for road riders who already own the exact crank interface it requires. Its 107 BCD and 8-bolt pattern make compatibility the deciding issue: if those match, this is a focused way to add power measurement to a 1x or 2x AXS setup without buying the XX Eagle crankset. If they do not, the headline features are beside the point.
The listing specifies ±1.5% accuracy, Bluetooth Low Energy, ANT+, and leg-balance measurement. That gives a rider useful training data and multiple ways to pair with a head unit or app. AXS integration also supports firmware updates. Compared with the SRAM Thread Mount Spider, this model calls out power balance and a specific accuracy figure, while the Thread Mount listing gives a replaceable CR2032 battery and IPX7 rating instead. The two are not interchangeable just because both carry the SRAM name.
My reservation is that the product is an interface-specific component, not a universal spider or a complete crankset. The supplied details do not state its battery runtime or water-resistance rating, so I would not assume those match the Thread Mount model. It is best treated as a targeted upgrade for a confirmed compatible road build, not a general-purpose recommendation.
Pros:- Stated ±1.5% power accuracy
- Bluetooth Low Energy and ANT+ connectivity
- Reports power balance between legs
- AXS integration supports firmware updates
Cons:- Requires a 107 BCD, 8-bolt compatible crank
- Battery life and water-resistance rating are not specified in the supplied details
Best for: Road riders with a compatible SRAM RED or Force AXS crank featuring a 107 BCD and 8-bolt interface who want power balance data.
Not ideal for: Riders with other crank interfaces, non-AXS setups, or anyone who needs a complete crankset or documented battery-runtime figure.
- Compatibility:1x/2x SRAM AXS crank setups
- BCD:107 mm
- Crank interface:8-bolt
- Stated accuracy:±1.5%
- Connectivity:Bluetooth Low Energy and ANT+
- Measurement:Power and leg balance
- Model:00.3018.229.000
Our verdict“For a road rider with the exact AXS crank interface, this is my strongest focused spider upgrade; for any other crank, I would choose a compatible alternative rather than adapt around it.”
CooSpo Power Meter Crankset S10, 160-172.5MM, BLE/ANT+ Cycling Power Meter for Easton 110 BCD 4-Bolt
The CooSpo S10 earns its place for riders who want a defined dual-sided setup and already use Easton 110 BCD 4-bolt crank hardware. Its stated ±1% accuracy, ANT+ and Bluetooth support, and claimed runtime of up to 300 hours make the spec sheet unusually specific in this group. For training where left-right contribution is useful, that dual-sided measurement is a more relevant distinction than connectivity alone.
Compared with the SRAM RED/Force AXS spider, the S10 provides a stated battery life and accuracy figure and is not presented as an AXS-specific product. But that does not make it broadly compatible: its Easton-only fit is just as important to check as SRAM’s 107 BCD and 8-bolt requirement. It also needs calibration through the COOSPO Tools app, which adds a phone-based step the SRAM options do not explicitly call out.
The aluminum construction, IPX7 rating, and 160–172.5 mm crank-length range suit an all-weather training bike, but the listing is specifically for Easton 110 BCD 4-bolt cranksets. I would skip it if the bike uses another spider interface or if you want a simple part swap without app setup. For the right Easton-equipped rider, it offers a clearer dual-sided proposition than the SRAM Thread Mount listing, whose description does not specify dual-sided measurement.
Pros:- Dual-sided power and cadence measurement
- Stated ±1% accuracy
- Up to 300 hours of battery life and IPX7 water resistance
- BLE and ANT+ device support
Cons:- Fit is limited to Easton 110 BCD 4-bolt cranksets
- Calibration and setup use the COOSPO Tools app
Best for: Easton 110 BCD 4-bolt owners who want dual-sided power, app calibration, and stated long battery life.
Not ideal for: Riders with non-Easton cranksets, or those who prefer calibration without a smartphone app.
- Compatibility:Easton 110 BCD 4-bolt cranksets
- Measurement:Dual-sided power and cadence
- Stated accuracy:±1%
- Battery life:Up to 300 hours
- Water resistance:IPX7
- Connectivity:BLE and ANT+
- Crank length range:160–172.5 mm
- Material:Aluminum alloy
- Calibration:COOSPO Tools app
Our verdict“I recommend the S10 over the more interface-specific SRAM road spider when an Easton crank is already in place and dual-sided data is a priority.”
SRAM XX Eagle Power Crankset 165mm, 32T, Black, Power Meter (Q174) Spider
Unlike the standalone spiders, the SRAM XX Eagle Power Crankset is a complete, mountain-oriented crankset with a 165 mm arm and 32T chainring. I rank it as the clearest choice for a rider assembling or replacing a compatible SRAM 12-speed AXS drivetrain, rather than someone who only wants to upgrade an existing road crank. Its DUB spindle and thread-mount chainring system define the intended ecosystem.
The product description highlights a carbon-fiber spider and dual-sided power measurement. That combination makes this the most explicitly trail- and drivetrain-oriented pick in the lineup, while the SRAM RED/Force model targets a road crank interface and the CooSpo S10 depends on an Easton 4-bolt setup. A complete crankset can reduce the guesswork of matching a separate spider to existing parts, but it also means the rider must verify bottom bracket, chainline, chainring, and frame clearance before ordering.
The supplied listing does not give battery life, wireless protocols, accuracy, or water-resistance figures, so I would not choose it over the S10 for a spec-led comparison of those details. Installation may also call for tools or professional help. This is a strong fit when the SRAM 12-speed AXS compatibility and 165 mm length match the bike; it is excessive for someone seeking only a replacement sensor spider.
Pros:- Complete crankset with 165 mm arms and 32T chainring
- Description specifies dual-sided power measurement
- Carbon-fiber spider and thread-mount chainring system
- Designed for SRAM 12-speed drivetrains and AXS connectivity
Cons:- Installation can require specialist tools or professional assistance
- Battery life, accuracy, wireless protocols, and water resistance are not specified in the supplied details
- Requires a compatible SRAM drivetrain and DUB setup
Best for: Mountain-bike riders building or refreshing a compatible SRAM 12-speed AXS drivetrain who want a complete 165 mm crankset.
Not ideal for: Road riders, owners of non-compatible drivetrains, or buyers seeking a standalone spider for an existing crank.
- Crank length:165 mm
- Chainring:32T
- Spindle interface:DUB, 28.99 mm
- Compatibility:SRAM 12-speed drivetrains and AXS
- Spider material:Carbon fiber
- Chainring system:Thread mount
- Power measurement:Dual-sided, per description
- Color:Black
Our verdict“For a compatible SRAM mountain bike that needs a complete crankset, this is the most coherent drivetrain-specific choice; for a spider-only upgrade, I would look elsewhere.”
SRAM Thread Mount Power Meter Spider for Cranksets
The SRAM Thread Mount Power Meter Spider is the straightforward option for riders who already have a compatible SRAM AXS crankset and want a spider rather than a new crank assembly. Its replaceable CR2032 battery is a practical advantage: riders can carry a common spare and replace the cell instead of planning around a rechargeable charging schedule. The stated 200-hour life is shorter than the CooSpo and ThinkRider claims, but remains a useful figure for routine training.
Bluetooth Low Energy and ANT provide the two common routes for sending data to a cycling computer or app, and the IPX7 rating gives this model a clearly stated weather-resistance specification. Compared with the SRAM RED/Force spider, the Thread Mount model has more explicit battery and water-resistance information, while the RED/Force listing calls out a specific accuracy figure and leg balance. These are different fit systems, not direct substitutes, so I would confirm crank and chainring compatibility before treating either as an upgrade.
The tradeoff is narrow fit and a need for a separate screen or phone to view data. The listing does not state an accuracy figure or say that measurement is dual-sided, so riders who prioritize those details may prefer the CooSpo S10, if they have the required Easton crank. This SRAM makes more sense as an AXS-compatible replacement spider than as a first power-meter purchase for a bike with unknown crank standards.
Pros:- User-replaceable CR2032 battery with stated 200-hour life
- Bluetooth Low Energy and ANT connectivity
- IPX7 water resistance
- Designed for SRAM AXS cranksets
Cons:- Compatibility is limited to SRAM AXS cranksets
- No display or screen is included
- The supplied description does not state accuracy or dual-sided measurement
Best for: SRAM AXS crank owners seeking a weather-resistant spider with a replaceable battery and common wireless support.
Not ideal for: Riders who do not own a compatible SRAM AXS crankset or need a display, stated accuracy figure, or confirmed dual-sided measurement.
- Compatibility:SRAM AXS cranksets
- Battery type:CR2032
- Battery life:200 hours
- Connectivity:Bluetooth Low Energy and ANT
- Water resistance:IPX7
- Product type:Thread-mount power meter spider
- Part number:SRAM-CKSP0061
Our verdict“This is my practical pick for an existing compatible AXS bike when replaceable batteries and a clear weather-resistance rating matter more than extra measurement detail.”
ThinkRider PP5 Spider Power Meter & Crankset, Carbon/Aluminum Options, 110 BCD 4-Bolt, BLE & ANT+, Lightweight, Road-24, 160-172.5mm, Road Bike Use
The ThinkRider PP5 takes a different route from the SRAM spider-only options: it is sold as a power-meter crankset, with listed crank lengths from 160 to 172.5 mm and BLE plus ANT+ support. That bundle may suit a road rider replacing more than the sensor, while its stated up to 300-hour battery life exceeds the Thread Mount SRAM’s 200-hour figure. It also pairs with a broad range of cycling computers and apps, according to the product description.
Compared with the CooSpo S10, the PP5 is framed as a crankset option rather than a specifically Easton-compatible meter. Still, its 110 BCD 4-bolt specification and the listing’s Road-24 designation mean I would check the exact crank, chainring, and drivetrain fit rather than assume universal road compatibility. Its approximate 565 g weight is also a real compromise for riders focused on keeping a road bike light; the XX Eagle crankset is aimed at a different discipline, but highlights how much drivetrain purpose matters more than a single weight figure.
The supplied description claims high accuracy and all-weather use, but it does not give a numerical accuracy figure or an IP rating. That makes the PP5 less transparent on those points than the CooSpo S10. I would choose it for a buyer who wants a complete crankset, long stated runtime, and two common connection protocols, but skip it if the bike’s fit is uncertain or low weight is a priority.
Pros:- Up to 300 hours of stated battery life
- BLE and ANT+ connectivity for computers and apps
- Crank lengths listed from 160 to 172.5 mm
- Available in carbon or aluminum options according to the title
Cons:- Approximate listed weight of 565 g may not suit weight-focused builds
- Numerical accuracy and water-resistance rating are not supplied
- 110 BCD 4-bolt and Road-24 fit details need careful verification
Best for: Road riders replacing a crankset who want BLE and ANT+ pairing, a choice of listed crank lengths, and long stated battery life.
Not ideal for: Riders who need a lightweight setup, a numerically stated accuracy rating, or a confirmed fit without checking the 110 BCD and Road-24 details.
- Product type:Spider power meter and crankset
- Material options:Carbon or aluminum
- Crank length:160–172.5 mm
- BCD:110 BCD, 4-bolt
- Battery life:Up to 300 hours
- Connectivity:BLE and ANT+
- Approximate weight:565 g
- Intended use:Road bike
Our verdict“The PP5 is a useful crankset bundle for riders who value runtime and broad device pairing, but I would confirm every fit detail before choosing it over the more clearly specified CooSpo.”
How We Picked
I ranked these products by how clearly each serves a distinct spider-power-meter buyer, not by treating every listed specification as equally valuable. My first filter is mechanical compatibility: BCD, bolt pattern, crank interface, drivetrain, and whether the listing describes a spider only or a complete crankset. A meter that does not match a rider’s existing parts is not a practical recommendation, even if its battery life or connectivity looks attractive.
Next I compare the data and upkeep that affect regular training. I give weight to dual-sided measurement where it is stated, wireless support for common head units, battery life, water resistance, and the calibration or update process. I also distinguish a model with concrete figures, such as the CooSpo’s stated accuracy and runtime, from listings that leave those details unspecified. I do not infer performance claims that the supplied product information does not establish.
Finally, I consider the cost of choosing each format in bike parts and setup effort. A full crankset can suit a rider building or replacing a drivetrain, but it is less convenient for someone seeking a drop-in spider. A narrowly compatible spider can be a tidy match for the right bike and a poor fit for nearly everyone else. My order reflects use-case clarity, fit constraints, and the usefulness of the stated features, with meaningful drawbacks kept in view.
| spider based power meter | Connectivity |
|---|---|
| SRAM RED/Force AXS Power Meter | Bluetooth Low Energy and ANT+ |
| CooSpo Power Meter Crankset S1 | BLE and ANT+ |
| SRAM XX Eagle Power Crankset 1 | — |
| SRAM Thread Mount Power Meter | Bluetooth Low Energy and ANT |
| ThinkRider PP5 Spider Power Me | BLE and ANT+ |
Factors to Consider When Choosing Spider Based Power Meters
Before I compare headline specs, I match the meter to the bike. A spider power meter is only useful if its mounting standard, crankset, and chainring arrangement suit the frame and drivetrain already in use.
Confirm the crank interface before choosing
Check the crank manufacturer and model, BCD, bolt count, spider attachment, and spindle system. The SRAM RED/Force spider requires a 107 BCD, 8-bolt interface; the CooSpo S10 specifies Easton 110 BCD 4-bolt cranks; and the SRAM Thread Mount model is for compatible AXS cranksets. The XX Eagle is a DUB-based crankset, not a universal spider. ThinkRider’s 110 BCD 4-bolt listing still calls for careful chainring and bike-fit verification. I would compare these details with the bike’s parts documentation before ordering.
Decide whether you need a spider or a complete crankset
A standalone spider can be a cleaner upgrade if the existing crank arms and drivetrain are compatible. A full crankset, like the ThinkRider PP5 or SRAM XX Eagle, is more useful when replacing crank hardware or setting up a matching drivetrain. It may also introduce extra checks: crank length, bottom bracket, chainline, chainring size, and frame clearance. Do not pay attention to the word “crankset” alone; verify exactly what parts the specific listing includes.
Choose measurement detail to match your training
Dual-sided measurement is explicitly listed for the CooSpo S10 and SRAM XX Eagle, while the RED/Force description specifies leg-balance data. The Thread Mount and ThinkRider descriptions do not establish dual-sided measurement, so I would not assume that feature for either. Riders who mainly pace intervals may value stable power data and reliable pairing more than balance metrics. Riders using left-right analysis should select a model whose listing clearly states the measurement method they want.
Compare wireless support and upkeep
ANT+ and Bluetooth can let a meter connect to compatible cycling computers, watches, or apps, but a display is not included with the SRAM Thread Mount spider. Battery figures vary: the Thread Mount lists 200 hours with a replaceable CR2032, while CooSpo and ThinkRider each state up to 300 hours. Those claims are not a guarantee of identical real-world runtime. Check whether calibration requires an app, as it does for the CooSpo S10, and whether firmware or battery maintenance fits your routine.
Treat accuracy and weather claims carefully
The CooSpo lists ±1% accuracy and IPX7, while the SRAM RED/Force spider lists ±1.5%. Other products provide some general performance or waterproof claims without the same numeric detail in the supplied information. I give more weight to a stated specification than an assumed equivalence, but accuracy figures alone do not decide fit or usability. For wet-weather riding, check the specific model’s stated rating rather than transferring a claim from another product in the same brand family.
Plan for installation and compatibility checks
A spider swap can require crank removal, compatible chainring hardware, and correct torque tools; a crankset installation involves still more fit and adjustment checks. The XX Eagle listing warns that installation may be complex. If you are unsure about the interface, have a qualified mechanic confirm compatibility before buying. A small amount of checking up front is preferable to discovering that a new meter cannot mount to the existing crank or work with the intended drivetrain.
Frequently Asked Questions
What makes a spider-based power meter different from other power meters?
A spider-based meter measures power at the crank spider, the part connecting crank arms and chainrings. It can be a compact alternative to a meter built into pedals or crank arms, but its usefulness depends on matching the spider’s mounting standard to the crankset. In this lineup, that means checking the SRAM 8-bolt or thread-mount systems, Easton 110 BCD 4-bolt compatibility, and the complete crankset requirements of the XX Eagle and ThinkRider products.
Can I use any of these meters with any SRAM crankset?
No. The products have distinct compatibility requirements. The SRAM Thread Mount spider is described for compatible SRAM AXS cranksets; the RED/Force model requires a 107 BCD and 8-bolt crank interface; and the XX Eagle product is a DUB crankset intended for SRAM 12-speed and AXS compatibility. I would confirm the exact crank model and interface rather than relying on the brand name alone.
Which option has the longest stated battery life?
The CooSpo S10 and ThinkRider PP5 both list up to 300 hours. The SRAM Thread Mount spider lists 200 hours and uses a replaceable CR2032 cell. The supplied information does not give a battery-life figure for the SRAM RED/Force spider or XX Eagle crankset, so I would not rank those models by runtime without checking the manufacturer’s current specification.
Do all five products measure power on both legs?
No. The CooSpo S10 and SRAM XX Eagle descriptions explicitly state dual-sided measurement, and the SRAM RED/Force listing says it measures power balance between legs. The supplied descriptions for the SRAM Thread Mount spider and ThinkRider PP5 do not clearly specify dual-sided measurement. If left-right data matters, I would confirm the exact measurement method for the particular version before choosing it.
Do I need a cycling computer to use a spider power meter?
You need a compatible device or app to view and record power data, though it does not have to be a dedicated cycling computer if the meter supports a suitable phone app. The SRAM Thread Mount listing specifically notes that it has no screen and requires a compatible computer or app. Check the wireless protocols supported by both your meter and receiving device: products here list BLE, ANT, or ANT+, but the exact combination varies.
Conclusion
I would choose the SRAM RED/Force AXS Spider for a road bike with the exact 107 BCD, 8-bolt crank interface, and the CooSpo S10 for an Easton-equipped rider who wants stated dual-sided data and a long listed runtime. For compatible SRAM mountain-bike builds needing a whole crankset, the XX Eagle is the most focused choice. I would pick the SRAM Thread Mount Spider for an AXS owner who values a replaceable battery, or the ThinkRider PP5 when a road crankset bundle and BLE/ANT+ pairing suit the build. In every case, I would verify crank, chainring, and frame fit before choosing features.
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