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) |
| Remarks | For 83 mm bottom bracket shell width |
|---|---|
| 2-piece crank construction | ✔ |
| Chain line (mm) | 57.9 |
| Chain ring combination | 38T, 36T, 34T (FC-M640/M645 chainring) |
| Compatible BB type | Outboard |
| Compatible chain | HG-X 10 速 |
| Crank Arm Length | 165 mm, 170 mm, 175 mm |
| Crank fixing bolt included | ✔ |
| Gear arms | 4 臂 |
| 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 | 83 mm |
| Crank arm fixing bolt_With | ✔ |
| Includes Crank Arm Fixing Bolt | Yes |
| Q-factor (mm) | 189.7 |
产品系列
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