Ok, I have searched the forums and I have found that I can run a 305/50/20 on a 20x9 with a 2.25" level kit, however I cant find a definitive answer for the backspacing and offset (which is confusing after looking at so many posts). I have a 08 Silverado Crew Cab, 2WD. Is anyone running this setup that can help me out? I have used the tire calcs. and I know the 305/50/20 is a 32x12. On a similiar note....does anyone think a 275/55 would look better under my setup or should I stay with the 305/50? According to the tire calcs., the 275/55 is only.05" smaller sidewall height, but is 1.2" narrower.