Shimano ZEE FC-M645/M640 Crank/Bottom Brackets Sets

• Thick wall aluminum construction
• Reinforced steel axle with 30% greater stiffness compared to Trail designated crank options
• Steel pedal inserts
• Includes SM-BB52 68/73 bottom bracket
• BB Included: Yes
• BB Shell Width (mm): 68
• BB Shell Width (mm): 73
• BB/Frame Interface: English
• Chainring BCD: 104
• Color: Black
• Crank Intended Use: Mountain
• Crank Length (mm): 175
• Defined Color: Black
• Drivetrain Speeds: 10
• Number of Chainrings: Single
• Pedal Spindle: 9/16″
• Rings: 36
• Spindle Interface Type: Shimano Hollowtech II
• Weight: 906
• keyword search: Shimano2018