what's the biggest tires you can put on these wheels? someone on another forum said you can't put 32's on these, is this correct?

 

What vehicle do you have? How much lift and the type of vehicle dictates the size. As far as width, I wouldn't go more than 11.50.

 

My 94 came from the factory with 10.5 x 31" tires on 15 x 7 rims, so a 11.5 x 32" can't be too much of a stretch. I did run 32s on this truck and noticed I had to run them with a few less pounds of air pressure to keep the centers from wearing more than the edges. So yes, it can be done safely although you may notice a very slight reduction in tread life.

 

I ran a good 80K miles with 32x11.5 BFG AT's (2 sets) on the stock 15x7 wheels. They didn't wear as evenly as the BFG's do on my JGC, but they did pretty good.