The specialized roval clx 40 disc carbon clincher 700c wheel front the clx 40 disc full carbon clincher is the perfect performance disc wheel light stiff and fast the wide internal rim width provides an optimum tyre profile for precise handling stiffness and aerodynamics the afd1 aero centre lock hub is 12mm thru axle or qr compatible making this an ideal wheel for the muddiest cross race or fast paced ride specialized roval clx 40 disc carbon clincher 700c wheel front features rim type