Its hard to explain. It's not the tires and I know the gas tank has doesn't have a lot to do with it. Tire pressure is the same and gas tank is always full. When I drive it for a while the driver side is almost tucked and the passenger side has a good 2 1/4 inch gap. But if I bounce on it, it levels out. But what doesn't make sense is sometimes it's completely the other way around. Passenger side is about tucked and driver side has a big gap