Shimano Ultegra RX 800 GS Rear Derailleur (11-Speed)

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The Shimano Ultegra RX800 GS 11-speed derailleur is the sister derailleur to the Ultegra R8000 derailleur, but features a "clutch," or what Shimano calls Shadow RD Plus technology. This is designed to reduce chain slap, noise and improve chain retention on bumpy section of riding surface. It is ideally suited to cyclocross, gravel and adventure riding. With it's GS long cage, the derailleur is compatible with up to a 34 tooth cog. The smooth and quick shift performance punches above it's weight class.  


  • Pulley maintains consistent distance to cassette for increased shift stability
  • Smooth, compact appearance thanks to Shadow technology
  • Stable shifting performance
  • On/Off switch for integrated clutch 

 Ultegra RX800     
Maximum Sprocket: 34T  
Minimum Sprocket: 11T  
Maximum Front Difference: 16T  
Total Capacity: 39T  
Speeds: 11
Weight: 248g

This product was added to our catalog on June 14, 2018