I have a 1950 4100 with 2400 original miles on it, and need to buy 6 new tires. 3 of the rears appear to be original US Royals in a 6.50-20, and the fronts are some maybe 30 year old Co-Op 7.00-20. I cant's decide whether to stay with that setup, or just make all 6 tires 7.00-20's? The staggered setup I have works okay, and look right. I like the 7.00-20 on the front, but a bigger rear might not? Also looking for a place in easy driving distance to pick up tires near NE Iowa, and maybe get mounted? I wish there was a better modern setup all together for these old trucks, but there are no great options, and it looks like it will be $2000 plus no matter what.
