Wiki Bicycle » SRAM » Ceramic Bearing Rear Derailleur Pulleys
The same hybrid ceramic cartridge bearings used in the new SRAM Red Rear Derailleur’s upper and lower pulleys are also available as an upgradable accessory to “hop up” your current drivetrain. Make the leap to reduced friction, increased stiffness, lighter weight, and added durability with this secret weapon.
Specifications
Compatibility: SRAM Red, SRAM Force, and SRAM Rival Rear Derailleurs
Material: Ceramic Balls/Stainless Steel Races
Weight: 12g each