good value rear hub for road use like those at the top-of-the-range, Sora road hubs feature Labyrinth and contact seals to prevent the ingress of corrosion-causing dirt and water; This, along with the internal grease sleeve both increase durability and reduce service intervals 8- and 9-Speed compatible the hub uses angular contact bearings designed to cradle the balls giving both radial and lateral support for superior strength And durability in real World riding conditions; They also offer precision bearing adjustment and easy maintenance available in 32 or 36 hole drilling comes complete with Q/R skewer can be used with 34T cassette.