tire width vs. wheel width

[Jeff7181]

What size tires go with what size wheels? For example, if I have an 18x7.5 in. wheel, what tire widths will fit on it properly? What about a 18x8 wheel?

 

[Demon-Xanth]

Most of the time tire manufacturers will state what rim sizes a tire will fit on. Such as 6.5"-9". A tire with more sidewall has more play as far as what rims it will fit on because the sidewall can bend more to accommodate the rim.

 

[franksta]

The tire manufacturer will have recommended wheel widths for their various tires. But I think my truck has 17x7.5" wheels and I run a 275 tire which is the widest I could run.

 

[Jeff7181]

Ok... so shouldn't have a problem putting 245/40/18's on a 18x7.5 inch wheel then ya think? I'm just thinking in general, not looking for the absolute limits.

 

[GoatMonkey]

I think it would be a little wide for a 7.5" wide wheel. It's close though. An 8" wide wheel should hold a 245 pretty well.

 

[Demon-Xanth]

Look at different tires that you'd like to have, then pull up the charts and see what matches.

Example:
I have 16x8 rims, stock tire diameter is 29", and want a BF Goodrich Radial T/A
http://www.bfgoodrichtires.com/specs/radial-t-a/12.html
265/60R16
275/65R16
285/60R16
295/50R16
are the tires that fit. However, to keep it close to my target of 29" in diameter, the 265/60R16 and 285/60R16 are my best alternatives. From there, it's a matter of preference or clearance in the wheel well.

 

[fbrdphreak]

245's are generally run on 8-8.5" rims. 275's are 9.5-10" rims.

A 7.5" rim should run a 225, although you can get away with a 235.

Keep in mind if you put say a 245 on a 7.5" rim, it won't have the same contact patch that it would have on an 8 or 8.5" rim. Some people stuff 275's on the stock 8" GTO rim, FWIW. I still wouldn't do it.

 

[melchoir]

As stated earlier it highly depends on the sidewall that you're running.

I currently run 17x9.5 up front with 275 tires, and 17x11 in the rear with 315/35/17 tires.