The specialized roval clx 40 disc scs carbon clincher 700c wheel rear the clx 40 disc full carbon clincher with the scs hub is the perfect performance disc wheel light stiff and fast the scs rear hub allows for a proper chainline on short chainstay performance road and cyclocross bikes the wide internal rim width provides an optimum tyre profile for precise handling stiffness and aerodynamics the afd1 scs aero centre lock hub is 12mm thru axle or qr compatible making this an ideal wheel for