Nitto tires rubbing on stock H2?

[2010_5thgen]

the title basically says it all. I have Nitto Trail Grapplers 35x12.5x17 on my stock 2007 hummer H2. when turning into a parking lot or something with a slight grade to it, i notice at a complete lock the wheel is hitting the front sway bar. theres even markings on the bar. is there a way to fix this? another question.....i plan on putting some 20" wheels on next spring. is there a better offset that i should get to help this? thanks for the help.