Shimano ZEE FC-M640 Crankset - 170mm 10-Speed 36t 104 BCD Hollowtech II Spindle Interface Includes Bottom Bracket BLK CheckoutSpec= 2.40-3.00 6”) inside 136 x 80

6”) inside 136 x 80 x 27cm (53

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Shimano ZEE FC-M640 Crankset - 170mm 10-Speed 36t 104 BCD Hollowtech II Spindle Interface Includes Bottom Bracket BLK CheckoutSpec= 2.40-3.00 6”) inside 136 x 80Shimano ZEE FC M640 Crankset 170mm 10 Speed 36t 104 BCD Hollowtech II Spindle Interface Includes Bottom Bracket Black. Shimano ZEE FC M645 M640 Crank Bottom Brackets SetsThick 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 TECH SPECS BB Included Yes BB Shell Width (mm) 68 BB Shell Width (mm) 73 BB Frame Interface English