This disc brake rotor is made from hardened, corrosion resistant steel. Commonly, though not exclusively, used for 50cc to 300cc dirt bikes, ATVs, go karts, scooters and buggies. Approximate dimensions:
Outer Diameter: 119mm
Centre Hole: 27mm
Thickness: 2mm
Mounting Holes: 5mm
Mounting Hole Spacing: 34mm (centre to centre)