BKCJ-0340 - 11 tooth, XD15 Ceramic Hybrid Bearing, Machined Delrin Derailleur Pulleys for 11 speed Shimano Dura Ace (9000 Series) and Ultegra (8000 Series) Derailleurs (5mm bolt hole) - Red 428420 Radial Suspension Bearing - 12mm

Radial Suspension Bearing - 12mm x 21/23mm x 5mm -

they require a light preload to guarantee the best adjustment

Enduro Bearings Hoodie | Independent Trading Company | full zip

61902 LLU/LLB A5 - ABEC-5 Radial Bearing (CN clearance) - 15mm x 28mm x 7mm -

BKCJ-0340 - 11 tooth, XD15 Ceramic Hybrid Bearing, Machined Delrin Derailleur Pulleys for 11 speed Shimano Dura Ace (9000 Series) and Ultegra (8000 Series) Derailleurs (5mm bolt hole) - Red 428420 Radial Suspension Bearing - 12mmBKCJ 0340 11 tooth, XD15 Ceramic Hybrid Bearing, Machined Delrin Derailleur Pulleys for 11 speed Shimano Dura Ace (9000 Series) and Ultegra (8000 Series) 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