If you're lucky enough to make it a few seasons without destroying your rear derailleur from a rock strike, unfortunately the pulley wheels will still wear out. If your bearings are feeling notchy, or the pulley teeth have rounded out, it's in your best interest to replace them to get the best shifting performance out of your drivetrain. These are genuine Shimano replacement pulleys for the XT M8000 11-speed mountain rear derailleur, sealed bearings included. Each kit includes two pulleys, enough for one derailleur.

Manufacturer Warranty: 2 years. Recommended Use: mountain biking. Compatibility: XT M8000-series rear derailleurs.

Unit Count: 1.0 Count. Auto Part Position: Rear. Color: Black. Brand: SHIMANO. Date First Available: January 26, 2016. Best Sellers Rank: #193,986 in Sports & Outdoors. Customer Reviews: 4.8 out of 5 stars 71 ratings 4.8 out of 5 stars. : B016VII4WK. Sport Type: ?Cycling. Size: ?XT RD-M8000. Part Number: ?Y5RT98120. Manufacturer: ?Shimano. Number of Items: ?1. Color: ?Black. Brand Name: ?SHIMANO. Item Dimensions LxWxH: ?5.5 x 3.75 x 0.75 inches. Package Weight: ?0.02 Kilograms. Item Package Dimensions L x W x H: ?3 x 3 x 0.4 inches.