Thanks for the feedback...I'll definitely post how they perform. Currently I have the stock 245-45-20's front and 255-45-20's rear. I bought a wheel and 245-45-20 for a spare. What I've read says that as long as you are below 3% size difference, you don't need to worry about diff damage...my concern is using the 245 as a spare on the rear. Any opinions? When I get the new tires, I'm tempted to go 255 all around.