Reviews & Ratings
The GEOID PM500 is a spider-based power meter with 4-bolt 110BCD 24mm interface, widely discussed as a rebranded or similar version of the Magene P505/P515. Users report it's typically priced between $180-$250, with weights around 668-680g including cranks. It uses a proprietary crank interface (similar to but not compatible with Easton/SRAM standards) paired with Senicx PR3 cranks, features ANT+/Bluetooth connectivity, and claims ±1.5% accuracy. The product is seen as a budget-friendly alternative to Magene's offerings, with compatibility with Magene apps and major cycling computers.
AI Summary
Pros
- Good value for money compared to similar power meters like Magene P515
- Compatible with major cycling apps and computers (Garmin, Wahoo, Magene, etc.) via ANT+/Bluetooth
- Uses improved 4-bolt clamping system compared to Magene's single-bolt design
Cons
- Heavier than comparable models (approximately 680g vs 625g for Magene P515)
- Proprietary crank interface limits compatibility with other crank arms
- Potential chainring compatibility issues requiring shims
Where to Buy

GEOID PM500 Cycling Bike Spider-Based Power Meter 4Bolt 110BCD 24mm Spindle Bicycle Crankarm for Shimano

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