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Specs

Type: Rear derailleur tension and guide pulley set

Compatible Derailleur: Shimano XT RD-M8100

Speed: 12-speed MTB

Sold As: Complete pulley set with bolts

FAQ

How often should derailleur pulleys be replaced?: Pulleys typically last 5,000 to 10,000 miles depending on chain cleanliness, drivetrain wear, and riding conditions. Visible tooth wear, audible noise during shifting, or play in the pulley bearing are all signs replacement is due.

Is this pulley set compatible with other Shimano MTB derailleurs?: This pulley set is designed specifically for the XT RD-M8100 12-speed rear derailleur. While some Shimano pulleys cross-fit between models, always confirm the correct replacement set for your specific derailleur generation.

Does this include both pulleys?: Yes. The set includes both the upper guide pulley and the lower tension pulley, with the bolts and hardware needed for installation.

Best For

Mechanics and home builders rebuilding or servicing the Shimano XT RD-M8100 12-speed rear derailleur who need the OEM tension and guide pulley set to restore smooth shifting performance.

Shimano XT RD-M8100 Rear Derailleur Tension and Guide Pulley Set Reviews:

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