Shimano CUES Front Chainwheel Chain Crank EFCU40001CB2X FC-U4000-1 (No Guard), Length 170mm, 40T, 9/10/11S,

Model number: FC-U4000-1 Series: CUES U4000 series Color: Series Color Rear Speeds: 40825; Compatible Chain: LINKGLIDE, HG 11-speed; Chainline (mm): 52 (30T, 32T), 50 (40T, 42T); O.L.D.: Through (mm): 148, 142 (30T, 32T), 142 (40T, 42T); O.L.D.: Internal/External Type: 141, 135 (30T, 32T), 135 (40T, 42T); P.C.D. (mm): Riveted; Spider/Gear Arm: 4; Chainring Combination: 30T, 32T, 40T, 42T; Q-Factor (mm): 178; Compatible Bottom Bracket Type: Square; Recommended Bottom Bracket: Threaded (Standard): BB-UN101・BB-UN/E shaft length (mm): Threaded (standard): LL123・Chain case compatible: X (40T, 42T) Specifications: Includes stainless steel chain guard mounting screws and crank mounting screws. Number of teeth: 40T