i got a 3" lift and 33" tires. it actually rode a little smoother than when i had the 31s. on the other hand, i cannot take big dips too fast because the tire will hit the lip of the fender, also i have 4 1/2 inches of backspacing on my wheels and the tires hit the frame when i turn the wheel all the way in one direction. acceleration decreased so i went to 4.10 gears (from 3.73) then my mileage really decreased. its a 98 1500 x cab with a 3 slow 5.