产品规格

型号 FC-M645
系列 ZEE M640 系列
Color Series color, -
Average weight 858 g (38T) 847 g (36T) 837 g (34T)
2-piece crank construction X
Chain line (mm) 57.9
Chain ring combination 38, 36, 34T (FC-M640/M645 chainring)
Compatible BB type_Outboard X
Compatible chain HG-X 10 速
Crank fixing bolt included X
Crank arm length (mm)_165.0 X
Crank arm length (mm)_170.0 X
Crank arm length (mm)_175.0 X
Gear arms 4 臂
Optional chain guard_Without chain / bash guard X
P.C.D. (mm) 104
Rear speeds 10
Recommended BB_Pressfit SM-BB71-41C
Recommended BB_Threaded (E-type) SM-BB52
Recommended BB_Threaded (normal) SM-BB52
Threaded BB shell width_83mm X
Crank arm fixing bolt_With X
Q-factor (mm) 189.7