There you go, I thought they would be comparable, or even cheaper.
Start looking for some used 19.5 wheels, hopefully with good used tires, and even if you buy new tires you will have a better wheel and tire combination for less money.
Then when you wear them out it will again cost less for a set of new tires, and easy to get.

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-