Crankset (1x10-speed)
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FEATURE
- FC-M640 68/73mm bottom bracket
- FC-M645 83mm bottom bracket
- Press-Fit bottom bracket compatible
- 34T/36T/38T
BENEFIT- Strong thick-wall 2pcs-crank arm
- Strong steel axle
- Steel pedal insert
- Choices of spec
- Weight: 906g (FC-M640, 36T, 170mm, without bash guard) 938g (FC-M645, 36T, 170mm, without bash guard)
TECHNOLOGIES
PRODUCT SPECIFICATIONS
| MODEL NO | FC-M640 |
|---|---|
| SERIES | ZEE M640 Series |
| Color | Series color, - |
| Average weight | 828 g (38T) 817 g (36T) 807 g (34T) |
| 2-piece crank construction | X |
| Chain line (mm) | 50.4 |
| 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-BB71-41A |
| Recommended BB_Threaded (E-type) | SM-BB52 |
| Recommended BB_Threaded (normal) | SM-BB52 |
| Threaded BB shell width_68mm | X |
| Threaded BB shell width_73mm | X |
| Threaded BB Shell Width | 68mm, 73mm |
| Crank arm fixing bolt_With | X |
| Includes Crank Arm Fixing Bolt | Yes |
| Q-factor (mm) | 174.7 |
SERIES LINE-UP
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Crankset FC-M645
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Free Hub Rear FREEHUB for Disc Brake (12mm E-THRU Axle, 142mm O.L.D.)
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Rear Derailleur SHIMANO SHADOW RD+ (10-speed)
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Free Hub Rear FREEHUB for Disc Brake (12mm E-THRU Axle, 150mm O.L.D.)
