You can buy 19.5 tires at most any truck tire place.

There are a number of sizes, 8R19.5 works well on a 1 ton, or at least they did on mine. Most if not all the other 19.5 tires are metric sizes, and generally require a wider rim, check before you decide on a size other than what you had.

Grigg

•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-