Half Off 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