The COOSPO S10 is a budget spider power meter (Easton Cinch interface, 110 BCD) that most reviewers find genuinely usable for recreational training at roughly $95–$150, with consistent day-to-day numbers and good battery life. However, independent testing repeatedly finds it falls short of its claimed ±1% accuracy — averaging about 3% off and reading 5–8 watts low, with larger errors on short efforts — and forum users report the acknowledged issues were never fixed by firmware.
Pros
- Affordable price of roughly $95–$150, well under typical power meter pricing123
- Average and normalized power within about 3% of a reference meter, consistent day-to-day and tracking effort145
- Lightweight at about 100g for the spider, saving significant weight versus a stock setup124
- Easy installation on 110 BCD cranks using standard square-taper bottom bracket tools12
- Simple ANT+ and Bluetooth pairing, with firmware updates and calibration via the Coospo app1
- IPX7 waterproof rating with upwards of 300 hours of battery life14
- Compatible with aftermarket Easton cranksets, enabling very light custom setups2
- Useful for recreational riders and intervals, helping hold a sustainable effort on climbs and long rides254
Cons
- Does not meet its advertised ±1% accuracy: consistently reads 5–8 watts low, closer to ±3% discrepancy41
- Short efforts vary widely, up to 12% error at 5 seconds, making it unsuitable for sprint analysis12
- Noticeable data refresh delay and occasional data jumps; 3-second averaging lags on short intervals2
- Installation play without spacers required adding roughly 3mm per side, and included spacers may not hit that exactly6
- Acknowledged accuracy/reliability issues were never addressed by firmware updates; suspected rebrand of the Thinkrider PP5 with the same issues3
- No software calibration or micro-adjustment capability, and instructions omit the required tool size4
- Left/right balance is calculated rather than measured, so imbalances cannot be accurately assessed6
- Adds weight to the bike compared with a non-power crank setup5
Key Facts
- Measured average power about 3% below a reference meter (154W vs 160W; normalized 181W vs 186W), with interval error ranging from 2.6% at 10 minutes to 12% at 5 seconds14
- Weighs about 100–101g for the spider alone; roughly 450g together with the carbon crank614
- 110 BCD 4-bolt chainring interface with Easton Cinch axle, available in 24mm or 29mm axle sizes64
- Rated IPX7 waterproof with claimed 300-hour battery life and magnetic charging12
- Claimed accuracy ±1% and maximum measurable power 2800W62
- Installation requires 35–40 Nm torque; without spacers there was significant lateral play, resolved by adding roughly 3mm of spacers per side46
- Data refresh rate of about one second, with 3-second averaging available but noticeable lag2
- Firmware V1.8.5 (January 2026) optimized the cadence algorithm to improve data stability; earlier tested units ran v1.0.7 and v1.8713
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?
- 5Velocity PrintworksCheap Carbon Crankset and Power Meter, Ultralight Pump, etc.
- 6MyBikePartsBudget-Powermeter mit Carbon-Kurbel: Coospo S10 im Test
- 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.
AI Summary
Pros
- Very affordable price (~$95) makes it accessible
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
Key Points
- Price: $95 USD
- Claimed accuracy: 1%
- Tested firmware version: v1.0.7
more key points in the review
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MYBIKEPARTS (10% off)Where to Buy
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|---|---|---|---|---|
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 aliexpress.com#1005011551930673Affiliate · MyBikeParts COOSPO Official Store98% positive Spider only | €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
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