Like the man said, it isn't the top of the wheel well you have to worry about, Its the front and back. If you move the front axle forward enough to clear the rear, then the front will hit. Heck, I trimed mine and went with a BPI bumper and the first time I did a ramp, the tire stuck between the rear of the wheel well and the bumper. I ended up lengthening the arms and cutting a couple of inches off of the bumper.
I think I claim the distinction of being the only guy to snap an axle on a ramp. :lecture: Boy the spectators sure went scurrying when they heard that loud pop.