Shimano's Ultegra Rear Freehub is the durable, lightweight heart of a race-ready rear wheel. Super-polished ball races provide ultra-smooth bearings and the hub's oversize design helps create stiff, responsive wheels. Plus, Shimano's labyrinth seals shut out dust, dirt and water for phenomenal durability.
Features and Information
The Ultegra Rear Freehub is compatible with 9- and 10-speed casettes.