I have been using Lego for quite some time in modeling projects from 1/16 scale tanks to 1/43 slot cars. The other day I just set out to find what I might be able to use directly for slot cars
I just received these lego wheels. They are 14.7 mm across with the rubber on. The wheels just pop off and a 3/32 ID brass tube fits firm in the opening allowing you to make hubs so you can use them with 3/32 axles. $1.49 for 8 wheels with tires. These have rims that almost look like VW rims. I bought other sets as well that have four spoke wheels. Good thing is they are Lego so you know they probably are making thousands of them. So if you want scale wheels for your cars, look at what Lego might have to offer
I also bought a 4X2 window frame that works as a perfect motor mount for my BARC sized can motors.