[mhsprecher]

Chevrolet used Jaxon rims that were 21". The rims were split and you can use a rim spreader to fit them to the tyres. Model Ts with with split rims used the same tool. I can dig up a photo of my rim spreader (it really is a contractor) that I used. A prior owner put Jaxon rims (and wheels, I assume) on my Model T.