Shimano rs81 c24 carbon road rear wheelhigh performance road racing wheel meets the demands of todays professional and amateur riders features 23mm carbon and alloy clincher rim is both light weight and rigid whilst maintaining high braking performance with standard brake pads 20 rear stainless steel butted and bladed straight pull spokes high lateral rigidity is improved with a wide flange spacing labyrinth double contact sealing low friction seals effectively shut out water mud and dirt w