Has anyone used a different size, from the OEM, tire on the GT/CS 18" rims? Has anyone had any bad experiences with the BF Goddrich G/Force tires?

 

A quick search will reveal dozens of threads about tire-size and B F Goodrich tires.

Consensus seems to be that you don't want to go larger than 255-series with the 18x8.5 rims.

During the approximately 8,000 miles I drove on two different sets of the BFGs I found them to be good all-around tires, comfortable and pretty sticky, without much noise or tramlining.

 

I've got 275/40/18's on my stock wheels (rear) with no problem. I've got 245/45/18's up front.

 

It's absolutely amazing the difference in the truck world and mustang world as far as tire sizes go. I have 7.5 inch wide rims and a 265(10.5) inch tires with no issues.

What is the reason for the differences here?

 

What series tire is it? 70 series? 75? The taller sidewall allows for the tire to balloon out more.

 

31x10.50 comes out to officially a 265/75

 

Ok so the sidewall height is determined by the 265/75. 265mm is the width of the tire tread and the sidewall height is determined by multiplying 265mm x 75%. Which is roughly what? 198.75 mm or a little under 8".

So a tire with an 8" sidewall can fit on a 7" wide wheel with a 10.5" tread width q heck of a lot easier than a tire with a 3" sidewall.

 

Ok I understand that now, thanks Gary