Disc Brake Rotor Adapter and 28T sprocket for Gas Motorized Bicycle 48cc/66cc/80cc

Disc Brake Rotor Adapter and 28T sprocket;
Designed mainly For gas motorized bicycle only;
Material:A6061
Inner Diameter of Center hole of Adapter:37mm;
Inner Diameter of Center hole of 28T sprocket:37mm
Out Diameter of 28T sprocket:12mm
Sprocket Teeth Thickness:4.2mm
Overall Thickness of Sprocket 28T: 6.2mm
Adapter plate Thickness:4mm;
Overall Thickness of Adapter:10.8mm
Net Weight:140g