Shimano Rear Derailleur. Rd-Rx800. Ultegra Rx. Gs 11-Speed. Top N
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.
Features:
- Chain Stabilizer mechanism adopted from MTB design
- ON/OFF switch
- Compatible with current road DUAL CONTROL LEVER
