Shimano ULTEGRA RX-800 11-Speed Rear Derailleur Medium Cage Black
With an integrated chain stabilizer mechanism, the ULTEGRA RX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner.
- Chain Stabilizer mechanism adopted from MTB design
- ON/OFF switch
- Compatible with current road DUAL CONTROL LEVER
- Max. front difference: 16T
- Total capacity: 39T
- Low sprocket: Max. 34T/Min. 28T
- Top sprocket: Max. 12T/Min. 11T