CHAINRING SHAPE: Round TOOTH PROFILE: 2X w/Shifting Ramps BCD: 110/80BCD CRANKSET TYPE: FSA Tempo 5 Arm TEETH: 30t - 52t DRIVETRAIN COMPATIBILITY: 10/11 speed Not sure if this is the one you need? Check out the handy FSA Chainring ID Tool here http://www.fsaeasychainrings.com/