BKCJ-0302 - 11 tooth, XD15 Ceramic Hybrid Bearing, Machined Delrin Derailleur Pulleys for 11 speed Shimano Derailleurs (5mm bolt hole) - Red TH-873 they only get better with

they only get better with time and use

75mm mount width

This bearing is used primarily in hubs

Black-Oxide treated Zero Ceramic as a step up

Threaded-Extended Inner Race w/Wrench-Flats

BKCJ-0302 - 11 tooth, XD15 Ceramic Hybrid Bearing, Machined Delrin Derailleur Pulleys for 11 speed Shimano Derailleurs (5mm bolt hole) - Red TH-873 they only get better withBKCJ 0302 11 tooth, XD15 Ceramic Hybrid Bearing, Machined Delrin Derailleur Pulleys for 11 speed Shimano Derailleurs (5mm bolt hole) The ultimate upgrade pulley. Guaranteed to last forever against corrosion Precision machined Delrin Derailleur pulleys featuring XD15 Ceramic Hybrid, radial bearings for enhanced shifting performance and longevity. Designed and manufactured for performance, these pulleys feature CN (tight clearance) bearings in the upper