CeramicSpeed pulleys for Shimano XT/XTR feature a unique symmetrical 14-tooth narrow-wide design, ensuring exceptional shifting performance. The narrow-wide design guarantees precise chain engagement, both when entering and exiting the pulleys. The increased pulley size, compared to stock, reduces chain friction. The pulleys have a lightweight milled alloy body for durability and long life, and are developed, designed, and hand-assembled in Denmark. Included in the package: Two 14-tooth pulleys UFO TECH Bearing Oil, 15ml dropper bottle Decal Universal UFO TECH Bearing Grease