[bouncytruck]

There's a guy near me running 38's and a 6" lift. The suspension is super, super stiff. Even the slightest flex and the tires will rub. 35's are usually recommended with a 6" lift. You can run bigger tires, but you'll probably need to do some fender trimming. The wheel off-set is key too. Also, keep in mind that anything above 35's isn't recommended with the half ton running gear.

Not all 35" tires are 35" tall. I'd do some shopping around to find some true 35's.