48 2 ton ought to be 10 lug on 7.25" bolt circle.
Used is best bet, only new wheels are 19.5" and even with largest tire are too small a diameter in my opinion.
Please check out the wheel and tire what to do sticky thread and the tech tip linked in it.

•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-