SMART Bike Trainers - Magene PES P505 Review: Can a $300 Power Meter Be This Good?

Description

The Magene PES P505 power meter—a budget-friendly option that delivers solid performance for just $300. I put it to the test indoors and outdoors, comparing it to other top power meters. Is it worth the price?

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GEAR I USE
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Bike part mentions in this video

Magene Power Meter PES P505 Base 4 Bolt 110 BCD 24mm Cadence Pedal Balance Ant Steel Spindle Crankset Chainring for Shimano Sram

Created: July 04, 2025

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
  • Measures both power and cadence
  • Broadcasts ANT+ and Bluetooth
  • 1.5% accuracy in power measurement
  • Provides left-right power balance and pedal smoothness
  • Features automatic calibration and active temperature compensation
  • Rechargeable battery lasting up to 200 hours
  • IPX7 waterproof
  • Available in five different crank lengths
  • Option to buy with a chainring for an extra $74
  • Easy installation
  • Consistent performance in various weather conditions
  • Competes with more expensive models

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
  • Provides left-right power balance and pedal smoothness
  • Automatic calibration and active temperature compensation
  • Rechargeable battery (200 hours)
  • IPX7 waterproof
  • Crank lengths: 165mm to 175mm
  • Q factor: 147mm
  • Weight: 782g with 172mm crank arm
  • Requires activation via Magene Utility app
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