Moto-Master HALO T-Floater Supermoto Racing Rotor #116101 This is the Ultimate Racing Disc for the professional Supermoto rider. Born on the race track, born as a winner: HALO-T-Floater design is 2019 IDM German Superbike Champion & British Superstock 1000 Champion. Its Full-Floating HALO design combines superior, controllable stopping power with optimal heat dispersion. This rotor is also available in the Supermoto Racing Kit with Radial Master Cylinder, Stainless Braided Brake Line, 4-Piston Caliper Kit, and a set of SinterPro RacingGP Brake Pads. The 300mm rotor fits great on 16" and 16.5" front racing wheels, which allows for easier caliper removal and wheel changes. The precision-ground outer ring is 5.5mm thick, with an extra cooling slot on the outer edge. T-Floater system ensures precise controlled full floating action which prevents front wheel drag under severe racing conditions. T-Floater pin-slot design allows high mechanical load while minimizing wear on the floaters and inner carrier. T-Floater system is lightweight due to specially designed, hard anodized aluminum floaters. The inner carrier is CNC machined from billet aircraft aluminum and anodized black. Not compatible with stock brake calipers due to the thicker braking ring. Designed for use with 4-piston supermoto calipers.*** Not recommended for 17" spoke wheels due to caliper/spoke interference on some brands of wheels. Please use the 320mm size Halo Rotor with 17" front wheels.