The COOSPO S10 is a budget spider-based power meter that offers an affordable entry into power training, with a lightweight design and easy installation on 110 BCD cranks. However, its accuracy is consistently below the claimed ±1%, with independent tests showing average errors of 3-5% and short-interval deviations up to 12%, and some units suffer from calibration faults or data dropouts. While a good unit can be usable for recreational riders tracking trends, serious racers should look elsewhere, and firmware updates are essential to fix erratic stock behavior.
Pros
- Affordable price: $95-$150, significantly cheaper than mainstream power meters123
- Lightweight: about 100 g for the spider, saving weight compared to some stock setups425
- Easy installation on 110 BCD cranks using standard tools (same as square taper bottom bracket)124
- Good battery life: rated 300 hours, with magnetic charging14
- IPX7 waterproof rating1
- Consistent power readings day-to-day for a good unit, tracking effort well for training463
- Compatible with aftermarket Easton cranksets, allowing very light setups25
- Firmware updates and calibration available via COOSPO app; updating to 1.8.5 improves stability137
- COOSPO support diagnosed a calibration fault and replaced the unit promptly3
Cons
- Accuracy falls short of claimed ±1%: average error about 3-5%, short intervals up to 12% off, and some units have calibration faults (+6-12% high)431
- Short zero-watt dropouts (1-4 seconds) occur when cadence changes3
- Noticeable data refresh delay and occasional data jumps; not ideal for short intervals2
- Stock firmware 1.3.0 was erratic; updating to 1.8.5 via COOSPO Tools is essential37
- Installation can require additional tools or spacers (about 3 mm per side) to eliminate play51
- Instructions do not specify required tool size for installation4
- Not suitable for serious racers or those needing highly accurate data41
Key Facts
- Price ranges from $95 to under $150 depending on source and promotions123
- Weight: power meter alone approximately 100-101 g; with carbon crankset about 450 g (352 g for 165 mm arms with Ti spindle, 453 g with spider)543
- Claimed accuracy ±1%, but measured average power difference about 3-3.5% vs reference, with interval errors up to 12% at 5 seconds143
- Compatible with 110 BCD 4-bolt Shimano chainrings and Easton Cinch axle interface542
- IPX7 waterproof rating and 300-hour battery life14
- Firmware 1.8.5 (2026) via COOSPO Tools optimizes cadence algorithm; stock 1.3.0 was erratic73
- Installation requires 35-40 Nm torque; without spacers there can be play requiring about 3 mm spacers per side45
- Successor S20 with SRAM 8-bolt interface planned for 2027; S11 is a cosmetic China variant3
Sources
- 1Crank & SprintsCoospo S10 Spider Power Meter | Accuracy Test Results
- 2Value WattsCoospo S10 Power Meter Review: The Budget King?
- 3ChinertownCoospo S10 - yet another Easton interface budget power meter spider
- 4Patrick LinoI Tested the Coospo S10 Power Meter - $100 Budget Winner?
- 5MyBikePartsBudget-Powermeter mit Carbon-Kurbel: Coospo S10 im Test
- 6Velocity PrintworksCheap Carbon Crankset and Power Meter, Ultralight Pump, etc.
- 7COOSPOFirmware release notes
Reviews & Ratings
27:47The reviewer discusses the COOSPO S10 Power Meter Spider, a spider-based power meter compatible with Shimano 110 BCD chainrings and an Easton Cinch axle, available as a standalone unit or as a set with an aluminum or carbon crankset (the C11 carbon set). He received it free of charge from COOSPO after having good experiences with their HW9 pulse meter, and notes that other online reviews suggest the accuracy isn't quite so good, which he expects may also show in his own testing. He describes the spider measurement principle, the company background (Shenzhen-based, formerly a contract supplier now building its own brand), and his installation experience with the Easton Cinch system, where he initially had play on the left and right and had to add roughly 3 mm spacers per side after consulting COOSPO.
15:02The reviewer mentions new cranks and a power meter, noting that the cranks are lighter than previous Rock Bros ones by about 30-40g, weighing around 287g for the crank arm. The power meter adds weight but has been fun to use, providing consistent power numbers that track with effort. They find it helpful for training and long rides to maintain a sustainable wattage.
08:43The reviewer found the COOSPO S10 Spider Bike Power Meter Easton to be an affordable entry into power-based training, praising its compatibility with Easton cranksets and lightweight design. He noted that it significantly improved his climbing endurance and overall training by providing real-time power data, though he experienced some data refresh delays and uncertainty about its consistency.
08:02The reviewer tests the Coospo S10 Spider Power Meter on a Shimano 105 crankset, highlighting its affordable price of under $150, solid carbon fiber build, and ease of installation. He measures accuracy against a reference power meter, finding about a 3% difference in average and normalized power, which he considers acceptable for the price. The reviewer concludes that the Coospo S10 is a great budget option for cyclists looking to start using a power meter, offering reliable data and good battery life.
17:28The reviewer tests the COOSPO S10 Spider Bike Power Meter, finding it to be a lightweight, affordable option suitable for recreational or new riders, but notes it consistently reads 5-8 watts lower than expected and doesn't meet its advertised ±1% accuracy claim.
The COOSPO S10 Spider Bike Power Meter Easton is a budget-friendly power meter priced around $95, with a claimed accuracy of 1%. Initial interest stemmed from Coospo's reputation in heart rate monitors, but independent testing by gplama revealed performance issues that were acknowledged by the company yet never addressed via firmware updates. It is suspected to be a rebranded Thinkrider PP5, sharing the same firmware and issues. Users generally advise to avoid this product until significant improvements are made. An 8-hour dual-recording test against Favero Assioma Duo pedals (autumn 2026) found mixed results. The first unit read +6 to +12% high from a fixed offset of about +16 W; COOSPO diagnosed a factory calibration fault and replaced it. The replacement read a consistent -2 to -3.5% across the power range, with no drift over 2.5 h and no residual torque after sprints, but brief 1-4 s zero-watt dropouts when cadence changed. It does not reach the claimed ±1%, but a good unit is usable for averages and trends. Firmware 1.8.5 is essential, as stock 1.3.0 was erratic. COOSPO blames the Easton CINCH interface for part of the data problems. Its successor S20 (SRAM 8-bolt, planned 2027) is already sold in China; the S11 is only a cosmetic China variant of the S10, and P10K/P10S power pedals are planned.
AI Summary
Pros
- Very affordable price (~$95) makes it accessible
- A good unit is consistent: -2 to -3.5% vs Assioma, proportional across the range, no drift over 2.5 h and no residual torque after sprints.
- The COOSPO carbon crankset is light: 352 g for 165 mm arms with Ti spindle, 453 g with the spider.
more pros in the review
Cons
- Testing revealed issues with accuracy/reliability that were acknowledged but not fixed
- Suspected to be a rebranded Thinkrider PP5 with same firmware and issues
- Users have reported it as 'crap' and recommend avoiding
more cons in the review
Key Points
- Price: $95 USD
- Claimed accuracy: 1%
- Tested firmware version: v1.0.7
more key points in the review
Use code MYBIKEPARTS (10% off) when ordering from COOSPO
MYBIKEPARTS (10% off)Where to Buy
| Rating | ||||
|---|---|---|---|---|
coospo.com Affiliate · MyBikeParts | €149 | $143 | – | – |
coospo.com Affiliate · MyBikeParts Aluminium Crankset | – | – | ||
coospo.com Affiliate · MyBikeParts Carbon Crankset | – | – | ||
 aliexpress.com#1005011551930673Affiliate · MyBikeParts COOSPO Official Store98% positive Spider only Price last checked 2 months ago | €130+ €2 shipping | $134 | £93 | 4.8(24)87 sold |
| aliexpress.com #1005012838831594Affiliate · MyBikeParts COOSPO Official Store4.9/5 · 98% positive | – | 4 sold | ||
 amazon.deAffiliate · MyBikeParts | €130 | – | – | 4.4(4) |
Variants
| Configuration | Sold as | Crank Material | Weight | Price |
|---|---|---|---|---|
| Aluminium Crankset | Complete crankset | Aluminium | — | $274.89 - $439.89 |
| Carbon Crankset | Complete crankset | Carbon | 453g | €345.90 |
| Spider only | Sensor only (no cranks) | None (no cranks) | 102g | £92.54 |
Specifications
Attributes
Software
Latest: V1.8.5, January 24, 2026
V1.8.5January 24, 2026
- 1.Optimize cadence algorithm to improve cycling data stability.
From the manufacturer's update service
Spotted an error in the specs? Help us correct it — sign in or create an account.
Questions about COOSPO S10 Power Meter Spider & Crankset (Easton Cinch)
Sign up and share your experience — help other riders decide!
Create Account & Review