This Listing is for TWO (2) Newly made Better Than Original, replacement Front WHEELS for an Aurora Model Motoring Thunderjet, The Tuff Ones style chassis. They will fit on a regular Aurora Thunderjet style 1/16" (0.0625") axle, The Wheels are designed to Press On. If someone wants on wheel to spin freely, they will need to ream out the axle hole slightly on one wheel. Sold as is. Buy with confidence please check out my other offbeat slot car related items. Descriptions are very accurate; No Returns. PLEASE ASK BEFORE YOU BUY IF YOU ARE UNSURE. We ship promptly professionally. We happily combine orders refund any excess s/h immediately upon shipping. We can always provide tracking. I charge $1 for expert handling/packaging, actual shipping. I ship out of the country almost daily. Please refer to my feedback, rating or time selling HO slots for assurances of a good honest deal. happy motorin' thanks S'lots from Bob. We Know H.O.