the newer ones when filled with air are suppose to be 2'' bigger than the older model. i was told i couldnt run the 7s cause wouldnt fit even with cutting spring pocket out by the retailer i bought them from. with the 6s i had to cut into the frame to make clearance so i see why they would say that with the 7s. e3mcgrath can u get a pic of the front of the truck with the db7s in the front.