Have a 1935 Ford Panel Delivery. Can't decide what size tires. Most pickup I see are running 185 or 195 on the front and 225 or 235 for the rear. I have 15" spoke rims.
Since I cruise all over the country, I have decided to pick 2 sizes (bigs and littles) that can be found in tire stores fairly easily. I ran Hoosier 31x12.50x15 on the rear of my roadster for the big effect and loved them, but I would have been up a creek if one had unraveled on the I-10 heading to El Mirage.