I am looking to put some wider tires on the boss when the Perelli p zeros are done but want more meat all the way around. I like my Boss 302s 19" wheels so I want to run the widest tires on these rims. Front 9" rears 10". I would like to go with a 305 on the rear and 285 or 295 on the front but most of the tire manufactures have a rim width recommendation. How critical is it? My car is not a daily driver so I am looking at the Toyo R888s.

 

275 is the biggest you can run up front. 285s will rub. 275s are possibly going to rub the inner fender covers in a full lock turn (I've got that problem on the left side, gonna trim the panel a lil'.) 265s and skinnier will be okiedokie.

Of course, if you lower the car, then the 275s may be even more likely to rub stuff in a full lock, so a steering stop might be in order.

aaand, my advice is assuming a 2006, so your car may or may not be acceptable with the 275 in the steering department already... and heck, for all I know, it might actually be ok with a 285. But I kinda don't think so.

One thing to note... the bigger the front, it changes turn in feel. I know that when I went from the 235 to the 275, it seems like the car doesn't really want to turn as easy. But maybe it's me...

Hope that helps!

 

Don't exceed the rim recommendations for a tire just because you "want" a bigger tire. If you want a bigger tire, get the right rim/offset spec'd to the tire. It's important.

 

Ooh, yeah, good point. Thems 9" in the front. Didn't see that...

If the offset is 40, then the 275s will still work. Here:

http://www.rimsntires.com/specspro.jsp

Put in your current stuff on the left, and what you want on the right. Nifty lil' calciputer, shows you diameter differences in the background, and 'as mounted' differences in the little window below the left side.

Now as to putting that wide a tire on the 9" wide rim, the issue may be that there will be some sidewall roll, so you'll wind up with a bit of sloppy steering feel, due to the bulginess of the mounted tire on that rim. It might be better to not put that wide a tire up front on that width rim for better feel.

 

Thanks for the info. Thats what I wanted to know. But I don't just want a bigger tire I need a bigger tire for more grip. Mostly on the rear.

 

Nice link, thank you.

 

I hear ya. You should consider going to an 18" rim. There are more tire options and you can get your widest tire options in that size. If you want more grip, 18" is where you will find it.