Bicycle front derailleur
(50/39/30T)
Model :
FD-R639 9Speed
| Model No. | FD-R639-F | FD-R639-B |
| Chain Ring | Triple | |
| Cassette Compatibility | 9 Speed | |
| Gear Teeth | 50T-39T-30T | |
| Capacity | 20T | |
| Route Type | Down Pull | |
| Chainstay Angle | 63-66 | |
| Mount Type | Brazed-on | Band |
| Chain Line | 45.0 mm | |
| Band Diameter | - | Φ34.9 / Φ31.8 (1) |
| Front Clamp Band | Aluminum cold forged | |
| Rear Clamp Band | Aluminum cold forged | |
| Outer Link | Aluminum cold forged | |
| Inner Link | Aluminum cold forged | |
| Chain Guide | Steel C.P. | |
| Weight | 124g | 133g |
| Remarks | (1) -Clamp spacer (SM-R31) allow the derailleur to be Φ31.8mm frame tube. Without ring spacer the derailleur mounts to Φ34.9mm frame tube. | |
