PRODUCT SPECIFICATIONS

MODEL NO FC-M645
SERIES ZEE M640 Series
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 BB type Outboard
Compatible chain HG-X 10-speed
Crank Arm Length 165, 170, 175
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 arm
Optional chain guard_Without chain / bash guard X
Optional Chain Guard Without chain / bash guard
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
Threaded BB Shell Width 83mm
Crank arm fixing bolt_With X
Includes Crank Arm Fixing Bolt Yes
Q-factor (mm) 189.7

SERIES LINE-UP

  • Hub Front Hub for Disc Brake (20mm Thru Axle, 110mm O.L.D.)
  • Free Hub Rear FREEHUB for Disc Brake (12mm E-THRU Axle, 150mm O.L.D.)
  • Free Hub Rear FREEHUB for Disc Brake (10/12mm E-THRU Axle, 135mm O.L.D.)
  • Cassette Sprocket HG Cassette Sprocket (10-speed)