The Shimano XT RD-M8100 12-Speed Rear Derailleur offers fast and shockless shifting with Hyperglide+. It provides silent and stable operation in all gears, thanks to its low-profile design. This derailleur is part of an extra wide range 12-speed drivetrain, which decreases rear derailleur and chain tension in low gear. The new bumper added to the rear derailleur pulley cage and bigger 13T pulleys with sealed bearings contribute to increased drivetrain efficiency.
The Shimano XT RD-M8100 12-Speed Rear Derailleur offers fast and shockless shifting with Hyperglide+. It provides silent and stable operation in all gears, thanks to its low-profile design. This derailleur is part of an extra wide range 12-speed drivetrain, which decreases rear derailleur and chain tension in low gear. The new bumper added to the rear derailleur pulley cage and bigger 13T pulleys with sealed bearings contribute to increased drivetrain efficiency.
in 5 offers
The lowest price for Shimano XT RD-M8100-SGS RD-M8120-SGS Rear Derailleur right now is $178.24 at GearHub Sports, compared across 4 retailers.
The all-time low was $137.99 on 23 Feb 2026 — today's price is 29% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 9 Oct 2026.
Shimano XT RD-M8100-SGS RD-M8120-SGS Rear Derailleur
The Shimano XT RD-M8100 12-Speed Rear Derailleur offers fast and shockless shifting with Hyperglide+. It provides silent and stable operation in all gears, thanks to its low-profile design. This derailleur is part of an extra wide range 12-speed drivetrain, which decreases rear derailleur and chain tension in low gear. The new bumper added to the rear derailleur pulley cage and bigger 13T pulleys with sealed bearings contribute to increased drivetrain efficiency.
The Shimano XT RD-M8100 12-Speed Rear Derailleur offers fast and shockless shifting with Hyperglide+. It provides silent and stable operation in all gears, thanks to its low-profile design. This derailleur is part of an extra wide range 12-speed drivetrain, which decreases rear derailleur and chain tension in low gear. The new bumper added to the rear derailleur pulley cage and bigger 13T pulleys with sealed bearings contribute to increased drivetrain efficiency.
Last updated at 09/10/2026 08:33:38
Shimano, XT RD-M8100, Rear Derailleur, Speed: 12, Cage: GS, Black, IRDM8100GS
Delivery $64.45
Rd Shm M8100 Xt 12S Sgs Shdw+
Free 30-day returns
Shimano Xt Rd-m8100-gs Rear Derailleur - 12-speed Medium Cage Black
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shimano Xt Rd M8100 Sgs Rd M8120 Sgs 12 Speed Rear Derailleur, Long Cage, Black
Free delivery between 20–23 Oct
| Brand | Shimano |
Shimano, XT RD-M8100, Rear Derailleur, Speed: 12, Cage: GS, Black, IRDM8100GS
Delivery $64.45
Rd Shm M8100 Xt 12S Sgs Shdw+
Free 30-day returns
Shimano Xt Rd-m8100-gs Rear Derailleur - 12-speed Medium Cage Black
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Shimano Xt Rd M8100 Sgs Rd M8120 Sgs 12 Speed Rear Derailleur, Long Cage, Black
Free delivery between 20–23 Oct
| Brand | Shimano |
