Skip to product information
    Shimano Ultegra Di2 RX805 11 Spd Rear Derailleur Black Medium Cage


Shimano Ultegra Di2 RX805 11 Spd Rear Derailleur

Shimano Ultegra Di2 RX805 11 Spd Rear Derailleur

Regular price $254.99
Sale price $254.99
Shimano Logo

Product ID: 113015

Earn rewards points on this item / Join Now
Out of stock

Shop all Shimano   |   Shop all Road Rear Derailleurs

View full details



Shimano Ultegra Di2 RX805 11 Speed Rear Derailleur

Tackle the paths less travelled with the Shimano Ultegra RX R805 11-Speed Di2 Shadow+ Rear Derailleur. Being the GS variant, this versatile derailleur is compatible with cassettes with a minimum sprocket of 11T and a maximum of 34T; perfect for undulating alpine routes. Removing the need for mechanical cables, this Di2 option eliminates poor performance caused by contaminates, corrosion or stretching, while the saver function protects the inner structure from large impacts.

The high tolerance cold forged aluminium construction is both lightweight and durable, while the low profile Shadow plus design tucks the derailleur out of harm's way. Completed with an RX clutch, the RX 805 reduces 'chain chatter' and effectively maintains tension, no matter the terrain below. This intuitive feature makes this a perfect choice for gravel riders and cyclocross racers alike.


  • Compatible with Di2 technology
  • Low profile Shadow+ design construction reduces risk of damage
  • Programmed automatic motion at the touch of a switch
  • Removal of traditional mechanical cables eliminates poor shifting caused by contaminates, corrosion and stretching
  • Saver (fuse) function, where the inner structure is protected from strong impacts
  • High tolerance cold forged aluminium link plates and body construction
  • Four self-lubricating micro-machined fluorine-coated link pivot bushings
  • RX clutch reduces 'chain chatter' and maintains tension
  • Suitable for mixed terrain use
  • 11-speed compatible
  • Maximum sprocket: 34T
  • Minimum sprocket: 11T


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

You Might Also Like

Ratings & Reviews