RS500 wheels offer proven technology based on the top of the range Dura-Ace modelsTubeless and tubed tyre compatible rim,Built with stainless steel bladed and butted spokes,The rear wheel uses a special wide flange hub design and an asymmetrical rim that results in additional stiffness and stability,Labyrinth and contact sealing - low-friction seals effectively shut out water, mud and dirt without affecting rotational smoothness,Quick and easy to maintain digital click bearing adjustment,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,Super polished ball races for high precision, durability, and smooth rotation,8,9, 10 and 11-speed compatible,700C Clincher rim only.