PRODUCT SPECIFICATIONS
| MODEL NO |
FC-M131 |
| SERIES |
SHIMANO |
| Color |
Series color |
| Remarks |
SHIMANO logo |
| AllBrandCommon BikeType |
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 |
✔ |
| Chain line (mm) |
47.5 / 47.5+t |
| Chain ring combination |
48 |
| Compatible BB type_Square |
✔ |
| Compatible BB type |
Square |
| Compatible chain |
HG for 8-speed, HG for 7-speed |
| Crank Arm Length |
170mm, 175mm |
| Crank arm length (mm)_170.0 |
✔ |
| 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 BB_Threaded (chain case) |
BB-UN100-K |
| Recommended BB_Threaded (normal) |
BB-UN100 |
| Threaded BB shell width_68mm |
✔ |
| Threaded BB shell width_73mm |
✔ |
| Threaded BB Shell Width |
68mm, 73mm |
| Crank arm fixing bolt_Without |
✔ |
| Q-factor (mm) |
1805 |
