Shimano CUES Front Chainwheel FC-U4000-1 (No Chain Guard), Crank Length: 170mm, 42T, 9/10/11S, EFCU40001CB2X

Enjoy high chain retention and power transmission even on rough terrain. Special gear tooth geometry improves chain engagement and retention, resulting in a smooth ride even on rough terrain. Dynamic Chain Engagement+. Compatible only with LINKGLIDE shifting systems.

DYNAMIC CHAIN ENGAGEMENT+. Gear Tooth Feature. DYNAMIC CHAIN ENGAGEMENT+ by SHIMANO features a gear tooth profile designed for single chainring configurations for XC, enduro, and trail riding. This prevents chain disengagement and ensures smooth pedaling, even on uneven terrain. Strong chain engagement in any gear reduces wear and tear. 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・Chaincase Compatible: X (40T, 42T) Specifications: Includes stainless steel chain guard mounting screws and crank mounting screws・Tooth Count: 42T