I am putting some 17" diameter, 8" wide, 4.5" backspacing wheels on my 1980 D150 and I can't decide on the rear tires. I'm thinking 275/60/17 will be a little too wide after measuring with my SS/T's wheel and tire. I'm afraid the tires might hit the top of the wheel opening. Keep in mind the SS/T wheel is 9" wide.






What is the widest tire you should put on an 8" rim? I would kinda like to go a little wider than the 255/70/15's (29.05" tall/10.04" wide) that were on the rear.

Here are the sizes I've been thinking about:
275/60/17 - 29.99" tall - 10.83" wide
265/60/17 - 29.52" tall - 10.43" wide
255/60/17 - 29.05" tall - 10.04" wide