235-75 R15 is on my 1955 1st truck. It also has stock front axle, front disc brakes, Rallye wheels and does not rub the fenders.
I would say the tire width is maximum for manual steering (unless you have strong arms).
There are websites that have a tire dimension calculator like
https://tirecalculator.com/235-75r15-tires.The website says the height of the 235-75 R15 radial tire is 28.9 inches.
If you look at the BF Goodrich bias ply 600-16 (close to a 1953 stock tire), the height is 28.36.
At one time the Rallye rims were the easiest to find used and were cost effective. No rocket science.
The problem I and many others have is that our favorite tire brand no longer, or soon may not, make our 15 inch tires anymore.
I blame it on kids who want enormous rims and rubber bands for tires that give a harsh ride.
I'm sure 15 inch tires will continue to be made in other brands but they may become specialty order and more expensive in the future.
Today's trend is to have 17 inch and larger rims for tall tires to obtain fuel efficiency and please the new generation.
If you want to do a 17 inch rim, use the calculator to figure out the tire you need.
Find a picture of what the rim and tire combination will look like on your truck before you purchase.
It's a personal taste but I like my 15 inch truck tires.
