Also, if you measure the rim width or find it stamped on the rim you can compare to list of acceptable rim sizes for each tire size. In the back of the Accuride wheel catalog is this sort of general info, follow links to it in the wheel and tire tech tip. Also tire manufacturers list this info for each tire.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-