Here is a calculator that tells teh difference from factory tires to new sizes nicley.
http://www.dakota-truck.net/TIRECALC/tirecalc.html


2000 KIA Sportage 4x4, Sadly Smushed! Now a 2001 Cheep Jerokee. 3" Rough Country Lift, 255/70/16 General AT2's
http://www.cardomain.com/ride/2292811