I recently got a 96 Chevy blazer 4x4 from my grandpa when he passed away. First thing I did was spray the rocker pannels with Plasti-Kote Bedliner.
I would like to do several more things, first would be new tires, and since I'm getting new tires, why not go bigger? What would be the largest possible tire size I could put on the stock rims without rubbing be?

 

30's would be the max.

 

i recently "slapped" on 30/9.5/15 on american racing ar 767 15x8. and I was rubbing on the back side of the fenders (with tcrank 1inch) however if you are staying stock rims with same backspacing iirc you ok...

 

im running 31's on 2wd rims with t-bar cranked bout 1" and shackles in the back with no rubbing