Image Item No. Description By  3486  Wheel Hard Plastic, Treaded 36mm D. with 4 Studs Catalog: Parts: Wheel 1  2148  Wheel Hard Plastic, Treaded 37mm D. x 22mm with 5 Spokes Catalog: Parts: Wheel 1  1148  Wheel Hard Plastic, Treaded with 7 Pin Holes and Inner Ring (37mm D. x 22mm) Catalog: Parts: Wheel 27