what do you guys think? will they fit? the wheel i want to use is 18x10 with a 6" backspace. i'm going to level the truck out with a set of green keys, or just crank up the t-bars. i'm fine with cutting the fenderwell, and also the lower bumper valance but not the fenders. it's a GMC, 4x4, D/A the whole bit.

if i were to go with a 305-width tire instead, what's the highest aspect ratio i can fit? am i correct on my backspacing? i do not want to run a bigger flare than what's stock.

thanks in advance!

I have 325/60/18 0n 18+9.5 with 6 inch bs.I had to turn tbars 6 full turns to help clear the tires also leveled it too.you will have to trim bottom inside of plastic bumper. also had to trim couple inches of plastic inner fender bottom front and rear.tires will rub sway bar a little when cranked all the way turned. did not want to spend 3grand on lift kit. my 2500hd is crewcab w DMAX.

bwalker, lets see some pics!:grd: