The RS505 Road 11 Speed Disc Hub from Shimano is a road disc hub, compatible with centre-lock rotors. These hubs feature improved sealing performance through the use of low friction Labyrinth and contact seals, and an internal grease sleeve. They are designed to be used with either rim brakes or centre-lock discs, for a secure and hassle free set up. The cones of this wheel have gone through a special Boron Nitride machining process to give super smooth rotations. The Aluminium hub shell has been cold forged and finished with an anodized finish and is compatible with either aero spokes or standard spokes. Available in Black, with 36 hole drilling.