Image Item No. Description  71720c01 (Inv)  Wheel 107.1mm D. x 24mm Motorcycle with Black Tire 132.6mm D. x 27mm Motorcycle Racing Tread Narrow (71720 / 71721) Catalog: Parts: Wheel & Tire Assembly  71720c02 (Inv)  Wheel 107.1mm D. x 24mm Motorcycle with Black Tire 139mm D. x 37mm Motorcycle Racing Tread (71720 / 71722) Catalog: Parts: Wheel & Tire Assembly  18976c02 (Inv)  Wheel 18mm D. x 12mm with Axle Hole and Stud with Black Tire 30.4 x 14 Solid (18976 / 58090) Catalog: Parts: Wheel & Tire Assembly