Thanks for the information. What exactly is threading width? is that the same as track width? The reason I was looking at International and ford trucks is because there are a ton of them around me. Fords have international diesels so pretty much the same??? I will look for some Kodiak and Topkick trucks. I will be using 22.5 wheels no matter what I use. My brother has a p30 chassis motorhome I was going to do some measuring on. He is done using it and is pulling the motor and tranny. The only concern is the p30 chassis with 22.5 wheels. Will the brakes be enough for that size wheel?