Image Item No. Description By  4185  Technic Wedge Belt Wheel (Pulley) Catalog: Parts: Wheel 2  42610  Wheel 11mm D. x 8mm with Center Groove Catalog: Parts: Wheel 2  13971  Wheel 18mm D. x 8mm with Fake Bolts and Deep Spokes with Inner Ring Catalog: Parts: Wheel 1  30285  Wheel 18mm D. x 14mm Catalog: Parts: Wheel 1  56904  Wheel 30mm D. x 14mm Catalog: Parts: Wheel 1  60208  Wheel 31mm D. x 15mm Technic Catalog: Parts: Wheel 1  68327  Wheel 41mm D. x 15mm Technic Catalog: Parts: Wheel 1  33211  Wheel Wagon 43mm Catalog: Parts: Wheel 1  4489a  Wheel Wagon Large 33mm D., Hole Round for Wheels Holder Pin Catalog: Parts: Wheel 1  2470  Wheel Wagon Small (27mm D.) Catalog: Parts: Wheel 1