Shimano RS510 Crankset - 175mm, 11-Speed, 46/36t, 110 BCD, Hollowtech II Spindle Interface, BlackThe Shimano RS510 11 speed crankset is an affordable option for 2x11 drivetrains. It features a 2 piece design with 4 gear arms for simple maneuverability and control. 46 36 gear combination 110mm chainring BCD Compatible with frames of O. L. D. 135mm and 410mm chainstay length Bottom bracket not included Product Specifics Rings: 46 36 Defined Color: Black Spindle Interface Type: Shimano Hollowtech II Chainring BCD: 110 Color: Black Chainline Hub