20five rs4 s pull centrelock rear wheel lightweight and stuff roadcyclocross disc specific rim built onto a hope rs4 straight pull centre lock disc hub built with rs4 straight pull centre lock 24 hole hubs using double butted sapim sprint straight pull spokes and brass nipples wheels machine built and hand finished in barnoldswick 700c wheel size tubeless compatible requires tape and valves only compatible with disc brake set ups the rs4 rear hubs feature the reduced drag ratchet mechanism co