The Hope Jockey Wheels 12T are a lightweight but durable design, for those looking for reduced drag in their drivetrain. Hope Jockey Wheels 12T Features  Stainless steel cartridge bearings with low friction seals for reduced drag CNC machined from 2014 T6 aluminium Labyrinth style spacers encapsulating / protecting the bearings, increasing product life and reducing maintenance Lightweight yet robust design Available in our 6 standard colours Will fit a wide range of Sram 11spd rear mechs Weight: 27g per pair