Key Features:Stainless steel cartridge bearings with low friction seals for reduced dragCNC machined from 2014 T6 aluminiumLabyrinth style spacers encapsulating / protecting the bearings, increasing product life and reducing maintenanceLightweight yet robust designAvailable in our 6 standard coloursWill fit a wide range of Sram 11spd rear mechsWeight: 27g per pair