John,
I really need a photo of Billy G's wheels to describe this ....But the crown of the tires is square (not round like most model shop aircraft wheels) and the hubs of the tyres have all the drillings simulating tie-bolts and rims like on a fullsize boeing 737 classic wheels... sorry can't be more precise than that....They are a very scale shape wheel the rubber is hard and durable..and they would look scale on the nose of my new bird...

cheers
Dave