Shimano Ultegra RX800 11 Speed Rear Derailleur


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sku: 113013

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Shimano Ultegra RX800 11 Speed Rear Derailleur

The Shimano Ultegra RX R8000 Rear Derailleur GS offers reliable and durable 11-speed shifting to the discerning cyclist looking to explore the paths less travelled. Utilising Shimano's tried and tested Shadow profile, this aesthetically pleasing derailleur stays safe from impacts, while the wide outer link plate reduces shifting deflection to ensure quick and precise gear selection.

Compatible with cassettes between 11-28T and 11-34T, this versatile derailleur is perfect for undulating alpine adventures, while the lightweight aluminium pulley cage helps to reduce weight without sacrificing performance or reliability. Completed with the RX clutch system, the R8000 is suitable for mixed terrain use; maintaining chain tension and virtually eliminating unwanted 'chain chatter' no matter the surface below.


  • Medium cage
  • Mechanical shifting
  • 11-speed compatible
  • RX clutch system stabilises the chain over rough terrain
  • Reduces 'chain chatter'
  • Lightweight aluminium pulley cage helps reduce weight without sacrificing shifting performance
  • Wide outer link plates increase pivot joint rigidity to reduce shifting deflection
  • Low-profile shadow design reduces the risk of damage in a crash
  • Wide gear ratio compatible with 11-28 up to 11-34T


ColorSeries color, -
Average weight248 g
Remarks*w/o bracket spec available
Cable adjusterX
Compatible chainHG-X11
Direct attachment (Conventional)X
Fluoric coated link bushings4
Low sprocket_Max.34T
Low sprocket_Min.28T
Max. front difference16T
Pulley_G pulley bearingX
Pulley_Sunken type pulley boltX
Pulley_T pulley bearingX
Pulley cageGS
Rear speeds11
Top-Normal spring type_SHADOW RD+X
Top sprocket_Max.11T
Top sprocket_Min.11T
Total capacity39T

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