Image Item No. Description  3137c01assy2 (Inv)  Brick, Modified 2 x 2 with Red Wheels for Single Tire with Black Tires 15mm D. x 6mm Offset Tread Small (3137c01 / 3641) Catalog: Parts: Wheel & Tire Assembly  7039c03 (Inv)  Wheel Classic 4 Studs and Axle with Black Tire 24mm D. x 8mm Offset Tread - Interior Ridges (7039 / 3483) Catalog: Parts: Wheel & Tire Assembly