Shimano Ultegra RD-X800 Rear Derailleur

Ultegra RX brings Shimano's pioneering chain stabilizing technology to road cycling, delivering smooth and precise shifting over technical terrain. It expands road bike capabilities, inspiring confidence on any surface and drives the evolution of road cycling to include greater elements of adventure. No longer is the road bike narrowly defined. Shimano Ultegra RX broadens the notion of drop bar riding and emboldens cyclist to explore further.

- Chain Stabilizer mechanism adopted from MTB design
- Stabilizer ON/OFF switch
- Compatible with current road dual control lever
- Shadow RD technology
- Direct mount compatible
- Maximum cog size: 34t
- Total capacity: 39t