規格 Specifications
| Series | DEORE XT |
| Model No. | FC-M8120-1 |
| Color | Series color |
| Rear Speeds | 12 |
| Compatible Chain | HG 12-speed |
| Chain Line (mm) | 55 mm |
| O.L.D. Thru (mm) | 148 mm |
| O.L.D. QR/Nut (mm) | 141 mm |
| P.C.D. (mm) | Direct |
| Spider/Gear Arms | 4 |
| Chainring Combination | 28T, 30T, 32T, 34T, 36T |
| Q-Factor (mm) | 178 mm |
| Crank Arm Length (mm) | 165 mm, 170 mm, 175 mm, 180 mm |
| Optional Chain Guard | Without chain/bash guard |
| HOLLOWTECH II | ✔ |
| Compatible Bottom Bracket Type | Outboard |
| Recommended Bottom Bracket (Threaded) | BB-MT801 |
| Recommended Bottom Bracket (Press-Fit) | BB-MT800-PA |
| Threaded BB Shell Width (mm) | 68 mm, 73 mm |
| Crank Arm Material / Finish | Aluminum / Anodized |
| Crank Axle Material / Finish | Steel / Plated |
| Outer Ring Material / Finish | Steel (teeth), CFRP (body), Aluminum (arm) / Painted (teeth), Anodized (arm) |
| Outer/Middle Ring Fixing Bolt Material / Finish | Aluminum / Anodized |
| Crank Fixing Screw Included | ✔ |
| Average Weight (170 mm, w/o Bottom Bracket) | 620g (28T) | 634g (30T) | 632g (32T) | 646g (34T) | 664g (36T) |