i was thinking of getting some new wheels. what is the widest anyone has ran in the rear without sticking out? going on truck in sig. i was thinking of getting a quad steer bed. but i would like to just get as much as i can under mine

 

I want to say 10" or maybe 11". With that wide of a wheel though, backspacing is crucial. Might have to cut the fenderwells though depending on the drop.

 

This is 9.5" wide with 6" of backspacing. Lines up perfect with the fenderwall.

 

There are to many factors to consider such as tire size and backspacing to give you a definite answer. You could have 20s stick out more than 24s depending on the backspacing. My 20s with 275/45 are inline with my fenders and are 8.5" unlike the guy above me whose rims stick out a bit.