When this brand is snapped into place, your increase should be less than 1.25 inch. The pads are 2 inches thick, but the metal jack pad goes into the pad and snaps in place. So for the rear you take a string and go from the bottom of the rear tires to the bottom of the Hitch ball. Pull tight. IF the jack pads are above that string, you have no excess drop problem on the rear jacks. Up front you want to measure the actual height from the bottom of the installed pads to the ground. Then eyeball items up front and see if you have ANY other chassis part lower than that jack pad. Then measure that item. IF the front jack pads are the lowest of any other chassis item, then you have to make note of that when driving. If you are concerned, and IF you have clearance ABOVE the top of the jack cylinder, Equalizer jacks are easy to move up in the mount holes. Doug