SRAM XXSL Power Meter Spider Crank 34t T-Type Q174 170mmThe XX SL Eagle AXS Transmission Power Meter Crankset combines the XX SL crank arm with an integrated power meter. All new spider design uses a proprietary chainring mount system which reduces weight without compromising reliability. Dual sided power measurement calculates total watts. It is also compatible with the Flight Attendant system, allowing for total connectivity between all AXS enabled components. Compatible with Flight Attendant. + 1. 5%