Just wondering what the biggest size tire you can get on there??

 

It's my understanding that you're not supposed to go wider than 235's on 7" rims. You can get wider to fit but it looks like the tire is bulging over the rim too much for me...

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85T/A 305/QJ work in progress.

 

I have 255 bfg radial ta's on a 15x7" rim and so des my friend and in summmit they say they fit 7-9" wide rims.

 

I had 255/60/15 Firehawks on the back of my Z with stock 15x7's and i think bigger would fit.

 

you shouldn't really over 255/60/15 or 245/50/15 on the 15 x 7s. The 255s I've heard a few times will rub on the the front of 3rd gen f-bodies. Only two tire mfgs. make the 245/50/15s though. Goodyear and Dunlop I believe. Very,very expensive!!