- 8/7/6-speed
- Crank arm lengths: 170mm
- Chainline: 47.5mm
- Chain guard option available
- Chainring combinations: 42-34-24T, 48-38-28T
PRODUCT SPECIFICATIONS
| MODEL NO |
FC-M131 |
| SERIES |
SHIMANO |
| Color |
Series color |
| Remarks |
SHIMANO logo |
| Bike Type |
MTB |
| Axle length of BB-UN/ES (mm)_Threaded (chain case) |
D-NL K |
| Axle length of BB-UN/ES (mm)_Threaded (normal) |
D-NL |
| Chain case compatible |
✔ |
| Chainring combination |
48 |
| Compatible bottom bracket type_Square |
✔ |
| Compatible BB type |
Square |
| Crank Arm Length |
170mm | 175mm |
| Crank arm length (mm)_170 |
✔ |
| Spider/Gear arms |
4 |
| Optional chain guard_With chain guard |
✔ |
| Optional chain guard_Without chain/bash guard |
✔ |
| Optional Chain Guard |
With chain guardWithout chain / bash guard |
| Recommended bottom bracket_Threaded (chain case) |
BB-UN100-K |
| Recommended bottom bracket_Threaded (normal) |
BB-UN100 |
| Threaded bottom bracket shell width (mm)_68 |
✔ |
| Threaded bottom bracket shell width (mm)_73 |
✔ |
| Threaded BB Shell Width |
68mm | 73mm |
| Crank arm fixing bolt_Without |
✔ |
| Q-factor (mm) |
1805 |
