Gravel/adventure component "GRX810" series 1x crank set. ■ Optimal gearing for complex terrain and riding styles. HOLLOWTECH 2 crank structure. ■For front single, rear 11-speed compatible. *Bottom bracket sold separately. Compatible chain: HG-EV 11-speed, HG-X11 Tooth count: 42T PCD: 110mm Chainline: 50.1mm Q-Factor: 151mm Axle Type: 24mm Recommended BB: SM-BBR60/SM-BB72 Compatible BB shell width: 68mm, 70mm Crank length: 170, 172.5, 175mm Reference weight: 656g