I have the 1" bar in the back, and the 36 mm "F" body bar in front. Lean is noticeably less, and less tire squeal when I go down an exit ramp in a hurry. I have 15" tires all around- 235-60X15. The tire size, springs, shocks, and sway bars all work together, so there are a zillion combinations, to match every driving style.