SRAM Red Threadmount Power Spider

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 Attributes BCD Thread Mount BB Inclusion No Chainline 47.5mm Connectivity ANT+, BT LE Primary Color Black