Shimano 1x12 Speed Deore XT RD-M8100 Rear Derailleur -
Shimano 1x12 Speed Deore XT RD-M8100 Rear Derailleur -
Shimano 1x12 Speed Deore XT RD-M8100 Rear Derailleur -

Shimano 1x12 Speed Deore XT RD-M8100 Rear Derailleur


Regular priceRs. 10,380.00
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Shimano DEORE XT - Rear Derailleur - Shimano Shadow RD+ - 1x12-speed
The all-new SHIMANO DEORE XT M8100 series of derailleurs brings a new level of drivetrain silence thanks to decreased tension in the low gear position and an added bumper on the pulley cage. Larger 13T pulleys increase efficiency and chain management while compatibility with SHIMANO's new 12-speed cassettes boosts ranges.


  • Fast and precise shifting performance optimized to take on any trail—faster and shock-less shifting.
  • The wide-range 12-speed drivetrain with low sprocket combination -10-51T
  • The silent drivetrain in all gear positions
  • Decreased rear derailleur and chain tension in low gear
  • New bumper added to rear derailleur pulley cage
  • Bump Stopper
  • Bigger 13T pulley
  • The stable drivetrain on rough terrain
  • Low-profile design


  • Model No: RD-M8100-SGS
  • Series: DEORE XT M8100 Series
  • Color: Series color
  • Average weight: 284
  • Remarks: w/Bumper on pully cage
  • Compatible chain: HG 12-speed
  • Total capacity: 41T
  • B-axle_Hollow axle: ✔
  • Mount_Direct attachment (Conventional): ✔
  • Fluoric coated link bushings: 7
  • Low sprocket_Max.: 51T
  • Low sprocket_Min.: 51T
  • Max. front difference: 0T
  • Pulley_G pulley bearing: Sealed Bearing
  • Pulley_Sunken type pulley bolt: ✔
  • Pulley_Teeth: 13T
  • Pulley_T pulley bearing: Sealed Bearing
  • Pulley cage: SGS
  • Top-normal spring type_SHIMANO SHADOW RD+: ✔
  • Top sprocket_Max.: 10T
  • Top sprocket_Min.: 10T
  • Rear speeds: 12


HYPERGLIDE+ drivetrain's redesigned cassette and chain promote the next generation of MTB riding by enhancing speed, shifting efficiency, and smoothness over any terrain.

Benefits & Features

  • Better chain engagement, more muscular retention, and smoother pedaling provide greater power and confidence over rapidly changing terrain.
  • Final up & downshifting in both directions boost riders' concentration and acceleration.
  • Ultra-efficient drivetrain with smoother power transmission increases comfort and reduces rider stress.
  • A wide range of gearing choices, cassette options, and the choice of a single or double front chainring support a wide variety of MTB riding styles, abilities, and preferences.

Bump Stopper
The rear derailleur bump stopper improves rider focus by silencing derailleur noise in rough conditions. This high-durometer urethane bumper prevents chain slap by absorbing impacts between the B-link and the rear derailleur B-tension adjustment screw.

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