BKCJ-0351 - 11 tooth/13 tooth, XD15 Ceramic Hybrid Bearing, Machined Delrin Derailleur Pulleys for 11 speed Shimano GRX Derailleurs (5mm bolt hole) - Black Radial Bearing (CN clearance) -

Radial Bearing (CN clearance) - 12mm x 21mm x 5mm -

and run quieter than stock wipers

For non-drive and Shimano cranks we also make MR24371 for the same oversized BB90 issue

HyGlide seals utilize the material and design advantages of our two-part seals (Polyurethane wipers and Moly-Disulphide-infused oil seals) and combine them into a single wiper/oil seal

BKCJ-0351 - 11 tooth/13 tooth, XD15 Ceramic Hybrid Bearing, Machined Delrin Derailleur Pulleys for 11 speed Shimano GRX Derailleurs (5mm bolt hole) - Black Radial Bearing (CN clearance) -BKCJ 0351 11 13 tooth, XD15 Ceramic Hybrid Bearing, Machined Delrin Derailleur Pulleys for 11 speed Shimano GRX 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