This budget-friendly spider-based power meter offers reliable power and cadence data with good accuracy for its price, though it has some compatibility limitations and minor reliability issues.
Pros
- Excellent value for money (typically $200-300)
- Accurate power readings comparable to higher-end models when properly calibrated
- Easy installation for Shimano-compatible setups
- Good battery life (up to 200 hours) with USB rechargeable battery
Cons
- Not a true dual-sided power meter (estimates left/right power balance)
- Left crank arm preload bolt frequently works loose, requiring threadlocker or redesigned bolt
- Not compatible with T47 internal and BB386 bottom brackets due to spider clearance issues
- Proprietary interface locks P505 Base version to Magene cranks only
Key Facts
- Claimed power accuracy of ±1.5%
- 24mm steel spindle compatible with Shimano bottom brackets
- Requires 110 BCD chainrings (4 or 5 bolt)
Reviews & Ratings
The reviewer discusses their experience with the Magene PES P505 power meter over several months, highlighting its reliability, affordability, and features. They compare it to higher-end models and other power meters, noting its consistent performance in various conditions.
AI Summary
Pros
- Rock solid reliability
- Affordable at $300
- Compatible with Shimano bottom brackets
more pros in the video
Cons
- Does not provide true left-side power measurement (estimated)
- Slightly less accurate (1.5%) compared to the higher-end QED 505 (1%)
Key Points
- 24mm spindle compatible with Shimano bottom brackets
- Measures power with 1.5% accuracy
- Broadcasts ANT+ and Bluetooth
more key points in the video
The reviewer extensively discusses the Magene Power Meter PES P505 Base 4 Bolt 110 BCD 24mm Cadence Pedal Balance Ant Steel Spindle Crankset Chainring for Shimano Sram throughout the video. They highlight its compatibility with Shimano bottom brackets, 110 BCD chainrings, and 24mm spindle, making it a direct replacement for Shimano cranks. The reviewer emphasizes its value at $300 (with a discount bringing it down to $270), its 1.5% accuracy rating, and its performance compared to higher-end power meters like the Favero Assioma pedals. They also note its IP67 waterproof rating, ANT+ and Bluetooth compatibility, and the inclusion of cadence data. The reviewer tested it against Favero Assioma pedals and found the power readings to be very close, especially when the head unit was positioned correctly.
AI Summary
Pros
- Compatible with Shimano bottom brackets and chainrings
- 110 BCD and 24mm spindle for easy installation
- Affordable at $300 (discount to $270 available)
more pros in the video
Cons
- Not a true dual-sided power meter (estimates left/right power balance)
- Initial power readings were skewed when the head unit was in a jersey pocket
- Requires calibration via the Magene app
more cons in the video
Key Points
- 24mm spindle compatible with Shimano bottom brackets
- 110 BCD for use with Shimano chainrings
- 1.5% accuracy rating
more key points in the video
The Magene PES P505 is a budget-friendly spider-based power meter, often praised for its accuracy and value. Users report typical prices around $200-300 USD, with weights around 638g for the spider/crank combo (no chainrings). It uses a 24mm steel spindle compatible with Shimano bottom brackets, but has compatibility issues with T47 internal and BB386 bottom brackets due to spider clearance. The power meter requires specific chainrings (110 BCD for the P505 Base version) and uses a proprietary interface that locks it to Magene cranks unless purchasing the separate spider-only version (P505-S1103). Accuracy is generally good after calibration, though some units require power scaling adjustments. Common issues include left crank arm loosening (addressed with a redesigned preload bolt), occasional creaking, and firmware update problems.
AI Summary
Pros
- Excellent value for money, often priced around $200-300 USD
- Accurate power readings when properly calibrated, comparable to Favero Assioma and smart trainers
- Easy installation for Shimano-compatible setups with straightforward setup process
more pros in the review
Cons
- Left crank arm preload bolt frequently works loose, requiring threadlocker or replacement with redesigned bolt
- Not compatible with T47 internal and BB386 bottom brackets due to spider clearance issues with some frames
- Proprietary interface locks P505 Base version to Magene cranks only, cannot be used with other cranksets
more cons in the review
Key Points
- Price typically $200-300 USD during sales (11.11 discounts available)
- Weight: Spider 112g, total system ~638g without chainrings
- 24mm steel spindle compatible with Shimano bottom brackets
more key points in the review
Where to Buy
Magene leistungs messer pes p505 bas für shimano sram 4 bolzen 110bcd 24mm cadence pedal ausgleich ant stahls pindel kurbel satz kettenring - AliExpress 18
Questions about Magene Power Meter PES P505 Base 4 Bolt 110 BCD 24mm Cadence Pedal Balance Ant Steel Spindle Crankset Chainring for Shimano Sram
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