• Bicycle front derailleur

Bicycle front derailleur

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.

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