Features:Durable smooth rolling sealed Deore 10-speed rear hubThe 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 maintenanceLow maintenance design includes single contact seals to keep out mud and waterLow-friction Cubic Boron Nitride treatment cone race surfaces for smooth action and long bearing lifeFor use in 135 mm dropouts including quick release skewerInternal grease sleeve help maintain and increase service life of hub by holding the grease in the bearing housing