Sram centerline x cl disc brake rotorthe sram centerline x disc brake rotor features an aluminium spider that draws heat build up away from the braking surface so you can enjoy more consistent braking on those long descents the shape of the braking surface has also been designed to keep the friction consistent with the pads for a quiet ride and to optimise your stopping power features material stainless steel rotor aluminium spider titanium bolts lightweight 2 piece design compatible with