i get about 10 inch in the front and 11 in the rear. it might be more in the front cause the bags dont compress completly when layed out. still got room for bigger rims
seriously thouhg, the only time my truck sees more than an inch or so is for a driveay, speedbump or a trailer, no other reason to have more than 40 psi or so in the bags, thats not why its built