Kawasaki ZX-6R 2015-17 Brembo 320mm SuperSport (HPK) Front Disc SetSupersport discs, developed to provide the highest possible performance on the road and on the track, are available with a rotor measuring 34 mm in width and oversized to 5. 5 mm in thickness, fully interchangeable with the original components without any modifications. These are fully floating discs consisting of a rotor in thermally treated steel (capable of resisting extreme thermo mechanical stress) and a housing machined from billet aluminium