¥14,520
SHIMANO XT FC-M8120-B1 Boost Crank Arms - 12 Speed
 
55mm chain line works with 148 O.L.D. Prioritizes frame and tire clearance over Q-Factor
 
Special MTB gear teeth profile improves chain engagement and retention
Hollow forged crank maximizes power transfer while limiting weight
Superior chain retention
Rigid and lightweight design for aggressive trail riding
Q-factor: 178mm
Chainline: 55mm chain line works with 148 O.L.D. (Prioritizes frame and tire clearance)
Compatible Bottom Bracket Type: Outboard
Compatible Chain: HG 12-speed
Bolt Circle Diameter: 96mm asymmetrical 4-bolt (direct mount spider)
Chainring sold separately
Rear Speeds: 12
Recommended Bottom Brackets: BB-MT800-PA (Pressfit); BB-MT800 (Threaded)
Bottom Bracket sold separately
Threaded BB Shell Width: 68/73mm
Weight: 616 g (28T)

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