When it comes to tires the tire width is spec'd for a set wheel width. However, the play on this is not the tire, but rather the wheel itself. What I mean is this.
You want the tire to spread out over the width of the wheel, and the wheel determines how much spread you will get.
If you stretch as 295 on the wheel your sidewall will slant inward toward the wheel lip (like a mushroom with the tread looking like it is trying to bow over the sides).
If you ran a 225 on that same rim the side wall would slant from the tread outward to the wheel lip (like a cone shape).
Having a 295 on a car and it looking bad will never get you the results you want to feel when looking at the car.
This is just my very humble opinion, but I wouldn't mount anything wider than a 255 or 265 absolutely MAX on that rim. Realize that a 295 is NOT going to appear any wider on that wheel than a 255 or 265, it is only going to give you a very distorded looking slanted sidewall, and will look like you stuck on a tire hat is too wide for the rim you are using... but it will not look wider. The tread is ONLY going to be as wide as the wheel and any excess tread as a result of being to wide a tire for the rim will begin trying to wrap around to the sidewall.
I have a 7.5" rear wheel currently, and I wanted a straight flat sidewall, so I used a 245 tire. It is perfect, and as much as I wanted a wider tire I knew that a 255 would be pushing it. So I went with the 245. A 255 may have given me a slightly acceptable "buldge" to the sidewall, but looks more oldschool, or like a set of drag radials. This would be fine for a 15 or 16 in. wheel, but not so cool on a lower profile 17" tire and wheel combo.
I now want to go wider, so I am attempting to sell my rear wheels to buy another set in an 8.5" width. This will allow me to run a 275 and have it look correct.
I wouldn't try and put a 295 on anything shy of a 9" rim. If you still want to try, measure the TREAD of the tire you are going to use while it is NOT mounted on a wheel. If your tread width is greater than your wheel width (inside lip to inside lip) than the tire is going to look very poorly on that wheel once mounted.
Last edited by mercury267; 07-23-2008 at 10:18 AM.