Sram Red Crankset with Stages left side power meter crank fitted. Works 100% perfectly and has been very reliable in use. Just updated to latest software. Normal cosmetic marks from use on carbon and rings - see photos *Compact BCD 110 *Rings - 50t/34t *Crank arm length 172.5mm *New 2032 battery just fitted *Sram GXP Bottom Bracket compatable (24mm drive side, 22mm non drive) *Will work with standard Shimano BB if you use a 22mm Reducer shim on non drive side *Actual weight of everything in the photos is only 615g!