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 an ON/OFF switch for the chain tensioner. The RD-RX805 DI2 version offers the digital precision of SHIMANO electronic shifting and synchronized shifting. 11 Speed
- 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