Shimano CUES Front Chainwheel Chain Crank EFCU80001CXB0X FC-U8000-1 (No Guard), Length 170mm, 40T, 9/10/11S,

Model number: FC-U8000-1 Series: CUES U8000 series Color: Series Color Rear Speeds: 40825; Compatible Chain: LINKGLIDE, HG 11-speed; Chainline (mm): 50; O.L.D.: Through (mm): 142; O.L.D.: Internal/External Type: 135; P.C.D. (mm): 96; Spider/Gear Arms: 4; Chainring Combination: 40T, 42T; Q-Factor (mm): 180; Compatible Bottom Bracket Type: External Specifications: HOLLOWTECH II, chain case compatible, stainless steel chain guard mounting screws, crank mounting screws included. Number of teeth: 40T