- Superior chain retention
- Special MTB gear teeth profile improves chain engagement and retention
- DYNAMIC CHAIN ENGAGEMENT+
- Rigid and lightweight design for aggressive trail riding
- Hollow forged crank maximizes power transfer while limiting weight
- HOLLOWTECH II
- Q-factor: 178 mm
- Chainline: 55 mm
- Weight: 616 g (28T), 630 g (30T), 628 g (32T), 642 g (34T), 660 g (36T)
TECHNOLOGIES
PRODUCT SPECIFICATIONS
| MODEL NO | FC-M8120-1 |
|---|---|
| SERIES | DEORE XT M8100 Series |
| Color | Series color |
| Average weight | 660 (36T) 642 (34T) 628 (32T) 630 (30T) 616 (28T) |
| Chainring combination | 28T, 30T, 32T, 34T, 36T |
|---|---|
| Compatible bottom bracket type_Outboard | ✔ |
| Crank fixing screw included | ✔ |
| Crank arm length (mm)_165 | ✔ |
| Crank arm length (mm)_170 | ✔ |
| Crank arm length (mm)_175 | ✔ |
| Crank arm length (mm)_180 | ✔ |
| Spider/Gear arms | 4 |
| HOLLOWTECH II | ✔ |
| Optional chain guard_Without chain/bash guard | ✔ |
| Recommended bottom bracket_Press-fit | BB-MT800-PA |
| Recommended bottom bracket_Threaded (normal) | BB-MT800 |
| Threaded bottom bracket shell width (mm)_68 | ✔ |
| Threaded bottom bracket shell width (mm)_73 | ✔ |
| Q-factor (mm) | 178 |
| Chain line (mm) | 55 |
| Compatible chain | HG 12-speed |
| P.C.D. (mm) | Direct |
| Rear speeds | 12 |
| O.L.D._QR/Nut (mm) | 141 |
| O.L.D._Thru (mm) | 148 |