Take An Extra 20% Off Select Components Shop End Of Season Clearance
Home Page


When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures.
  • Just In
  • Learn

XT RD-M8100 Rear Derailleur - Bike Build

Be the first to review

Style & Size:


Why We Like the XT RD-M8100 Rear Derailleur

Tucked away and quiet as a mouse, the XT RD-M8100 Rear Derailleur is Shimano's all-new addition to the XT M8100 series. Decreased tension in the low gear position and an added bumper on the pulley cage improves the silent features of this derailleur. Shimano's Shadow RD+ tucks the derailleur out of harm's way with a low-profile design. A bigger 13t pulley increases efficiency and chain management, and the fast and precise shifting performance offered is optimized to tackle any trail be it smooth rollers or bumpy singletrack.


  • XT rear derailleur designed for Shimano 1 x 12 drivetrains
  • Larger 13t pulley improves efficiency and chain management
  • Tension decreased at a low gear to keep smooth and quiet
  • New bumper on pulley cage silences things further
  • Shadow RD+ with stabilizer switch reduces chain slap and drop
  • Fast and performance shifting optimized for trail riding
  • Item #SHIU1AD
[max] 51t
Cassette Range
10 - 51t
1 x 12
Claimed Weight
284 g
Recommended Use
Manufacturer Warranty
2 years

What do you think about this product?


Selecting an option will reload the available reviews on the page

Sorry, we don’t currently have any of those types of reviews for this product.