- Rear derailleur.
- Road bikes.
- Model No.: RD-R42 or RD-R42S.
- Cassette Compatibility: 10 / 9 Speed.
- Cage Type: Long Cage (RD-R42) / Short Cage (RD-R42S).
- Front Chain ring: Triple (RD-R42) / Double (RD-R42S).
- Max. Sprocket: 28T.
- Min. Sprocket: 11T.
- Total Capacity: 39T (RD-R42) / 33T (RD-R42S).
- Guide Pulley: Engineering Composite with Steel Bushing.
- Tension Pulley: Engineering Composite with Steel Bushing.
- Bracket Body: Aluminum / Black.
- Bracket Pivot Seal: No.
- Plate Body: Composite / Black.
- Plate Pivot Seal: No.
- Outer Link: High-Polished Aluminum.
- Inner Link: Black Painted Steel.
- Link Pin Bushing: No.
- Outer Plate: Black Painted Steel.
- Inner Plate: Black Painted Steel.
- Weight: 288g (RD-R42) / 265g (RD-R42S).
- Compatibility: Shimano 9/10 Speed Road Rear Derailleur Compatible.