I have the 295 50 15 on the rear of my 2 GNs. both with 15x8 4"bs. One has stock height springs with no issues, the other is lowered with moog 5413 springs, and needed 5psi inflated into airlift bags to prevent rubbing the inner fender during a hard tilt, but even with 5psi, the rear is still much lower than stock rear springs. both of my cars currently do not have rolled fender lips.