What's too much? I ran 5psi in my 35s on 7s and 8s and run 3 in my 38s on 8s. Only time I've popped a bead was when I backed down off a ledge and got my tire wedged in a hole and slid sideways.

 

33s here I come!

 

may buddy runs 35 x12.50 on 15x7

 

Does he use wheel spacers? If not, you know what backspacing he has? The new debate with my buddies is rubbing because of how wide they are and seems to have issues with rubbing the control arms

 

the back spacing and center offset is what will make it rub of not rub. since you have the 7" wide rims i would run them if the offset is correct for them to not rub. if they will rub I would buy wheels 15X8 with the correct offset.

*edit* from searching most people run 4-4.5" BS with 15x7 or 15x8 wheels.... but i would search the lift pics to see what people are running and how it looks.

 

^^ if you have 4" of backspacing on at 15x7 rim then you have 0mm offset so i think it will rub, a 15x10 wheel norm has like -38mm offset. i am curious to know if a 15x7 rim will work with 4" of backspacing cause i have some 33x1250's also i would like to mount