ITEM NAME:Rear Brake Disc Disk Rotor for Chinese 50cc-160cc Dirt Pit Bike CRF50 SSR Description: Rear Brake Disc Rotors with 4 holes. 190mm diameter with 76mm inner hole. This disc rotor fix on Rear wheel, not only looks great but also offers a substantial weight reduction. Allowing greater heat dissipation to prevent disc and pad over-heating. Great design, the shape of the disc rotor ensures good heat dissipation under heavy braking sessions. Fitment: for Chinese 50cc 70cc 90cc 110cc 125cc 140cc 150cc 160cc Dirt Pit Bike CRF50 SSR Motorcycle. Specification: Material: Stainless Steel Outer Diameter: 190 mm / 7.48 inch Inner Hole Diameter: 76 mm / 2.99 inch Adjacent Bolt Distance: 72 mm / 2.83 inch Diagonal Bolt Distance: 100 mm / 3.94 inch No. of Holes: 4 Placement on Vehicle: Rear Package Includes: 1 Piece Rear Brake Disc Rotor.Great design, the shape of the disc rotor ensures good heat dissipation under heavy braking sessions. 1 Piece Rear Brake Disc Rotor. Rear Brake Disc Rotors with 4 holes. Allowing greater heat dissipation to prevent disc and pad over-heating.