CeramicSpeed Pulley Wheels Shimano 11-Speed - 12 Tooth Narrow Wide Coated Races Alloy BLK

CeramicSpeed Pulley Wheels for Shimano 11-Speed - 12 Tooth Narrow Wide Coated Races Alloy Black. CeramicSpeed pulley wheels reduce friction last 3-5 time longer than stock high-end pulleys and are designed to work with less drag.

Premium Grade 3 Silicon Nitride Ceramic balls

Hand built in Denmark