In case anyone is looking for more data points on lifts, wheels and tires. I had a 2.5" Rough Country Level/Lift kit installed... and then installed 295/55R20 Toyo Open Country ATII Xtremes, with Fuel Maverick 20x9 Wheels in a +14. After having it done... I should have gone with the +1 offset... which would have stuck out an extra 13mm's, which is .5" inches. I would have loved to gone 305/55R20's... but I wanted to keep the Chevy mudflaps... and they would had to of come off. The 295/55R20's fit with an 1" to spare!