SRAM Force AXS Crankarm Power Meter Upgrade Kit Description: SRAM Force AXS Crankarm Power Meter Upgrade Kit allows users to add the intelligent and accurate measure of power through the reliable precision of Quarq technology. Features: Power meter upgrade kit for SRAM Force AXS cranksets Proven, Quarq reliability and accuracy Lasting battery life powers up to a season of rides Spindle-based design calculates total watts using only left side measure Specifications: Bottom Bracket Spindle Interface: SRAM DUB Bottom Bracket Compatibility: SRAM Road DUB BBs Chainring Material: Chainrings Not Included BCD: SRAM Direct Mount Power Meter Type: Spindle Connectivity: SRAM AXS, Bluetooth, ANT+