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Tire Sizes and Options... What do the Numbers Mean ??

OK, In looking for tires for my 1930 Chevrolet AD Universal - Canopy Express Truck (Huckster) per the Manual the Tire size is 19" x 4.75". What excatly does this mean ?? I know that 19" is the Rim Diameter, but the 4.75" is that the tread width or Cross Section of the tire ??

I looked at the size on the tires that are currently on there, and they say this tire replaces 19"x 4.25", 4.75", 5.00", & 5.25". I measured the tires, the Approx Outside Diameter (Overall) is about 30.00" and the tread width is Approx 3.88" with the Cross section or Bulge Diameter Approx 4.50".

My question is wha tsize tires should I be looking for ??
When shopping around (COker for Example) I see sizes like 19x400, 19x450, etc... what sizes can I Use ?? can i use a larger cross section and tread width ?? Pros Cons, Thoughts ??

4.75" is the Cross Section width suggested for your rim measured from inside to outside of a properly mounted and inflated tire but without any load on it. Some rims allow a wider Cross Section width to be mounted safely.That is why you see different numbers.

I suggest calling Coker or Universal Tire in Hershey,PA for info.

try les scwhab, you have to actually go to the store as they would have to look them up. They may not have anything, but they do have some unexpected items, it won't take very long, and it is free.

Does this help at all?

Peggy M