Image Item No. Description By  50944  Wheel 11mm D. x 6mm with 5 Spokes Catalog: Parts: Wheel 13  93595  Wheel 11mm D. x 6mm with 8 'Y' Spokes Catalog: Parts: Wheel 1  93594  Wheel 11mm D. x 6mm with Smooth Hubcap Catalog: Parts: Wheel 8  15038  Wheel 56mm D. x 34mm Technic Racing Medium, 6 Pin Holes Catalog: Parts: Wheel 21