- Thread mount design is light, stiff and accurate, and available in 38T-46T
- User replaceable CR2032 battery with 200-hour battery life
- Bluetooth low energy technology and ANT+ wireless data transfer
- MagicZero automatically checks and recalibrates your power meter as you ride
- No cadence magnet required
- AXS™ enabled for easy monitoring and firmware upgrades
- SRAM Model ID: PM-AXS-SPDR-E1
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