N+1 Bikes
Shimano ZEE FC-M640 Crankset - 175mm 10-Speed 36t 104 BCD Hollowtech II Spindle Interface Includes Bottom Bracket BLK
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From N+1 Bikes
Shimano ZEE FC-M645/M640 Crank/Bottom Brackets SetsThick wall aluminum constructionReinforced steel axle with 30% greater stiffness compared to Trail designated crank optionsSteel pedal insertsIncludes SM-BB52 68/73 bottom bracket