I have three 4.5" rims and one 4" rim with 215 85R16 tires and I cannot tell which of the four is the 4" rim.
They do not look like donuts. They don't even look much like radials since the corners are square looking like bias ply tires.
I had already payed a small fortune on prep and body color paint on that 4" rim before I realized that it was skinnier than the other three. Turns out that it didn't matter.
They are set up tubeless to boot.
Carl


1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission