FD 318 vs Braze-on (direct-mount) front derailleur (braze-on tab): specs compared
Updated 05 September 2026.
3
specs differ
FD 318 and Braze-on (direct-mount) front derailleur (braze-on tab) differ on 3 specs: mount / band size, designation, typical frames.
| Spec | FD 318 | Braze-on (direct-mount) front derailleur (braze-on tab) |
|---|---|---|
| Mount / band size | 31.8 mm (1 1/4 in) seat-tube clamp | no clamp, bolts to a frame tab |
| Designation | 31.8 mm band | braze-on tab |
| Typical frames | the most common round-tube clamp size on aluminium road and touring frames | carbon and higher-end aluminium road, gravel and MTB frames with a moulded or welded derailleur tab |
Questions and answers
How do FD 318 and Braze-on (direct-mount) front derailleur (braze-on tab) compare?
FD 318 and Braze-on (direct-mount) front derailleur (braze-on tab) differ on 3 specs: mount / band size, designation, typical frames.