CeramicSpeed SRAM OSPW System 110570

- Proven to be the fastest pulley system, chosen by many of the world's leading cycling teams and professional triathletes\n- Optimized tooth designs offer 3-5 times longer life than standard OE pulleys\n- Standard: low drag with hardened steel races and ceramic ball bearings\n- Coated: metallic layer that covers bearing races making them 75% harder than steel. Even lower friction and highly resistant to corrosion\n- In the box: complete upper and lower OSPW system, 15ml CeramicSpeed Bearing Oil dropper bottle, and custom installation tool