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SHIMANO RD-M8100 Deore XT Rear Derailleur

SHIMANO RD-M8100 Deore XT Rear Derailleur


Regular price MSRP 1,900.00
Regular price MSRP 2,900.00 Sale price MSRP 1,900.00
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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 thank 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 range


  • Fast and precise shifting performance optimized to take on any trail
  • Faster and shockless shifting
  • HYPERGLIDE+Wide range 12-speed drivetrain with low sprocket combination -10-51T
  • 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
  • Stable drivetrain on rough terrain
    Low-profile design
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Technical Specifications

ColorSeries color
Average weight284
Remarksw/Bumper on pully cage
Rear speeds12
Compatible chainHG 12-speed
Top-normal spring type|SHIMANO SHADOW RD+
Mount|Direct attachment (conventional)
Max. front difference0T
Total capacity41T
Low sprocket|Max.51T
Low sprocket|Min.51T
Top sprocket|Max.10T
Top sprocket|Min.10T
Fluoric coated link bushings7
Pulley|Guide pulley bearingSealed Bearing
Pulley|Tension pulley bearingSealed bearing
Pulley|Sunken type pulley screw
B-axle|Hollow axle