My buddy bought a 99 Jayco Hawk Lite. It has 13" tires on it which need to be replaced. Can he go to 15" without any problems? He doesn't tow very long distances so far and could use all the ground clearance he can get. We realize that the spare will have to be moved from the tongue, but that's no problem, actually a plus. It doesn't have leaf springs so he can't flip the axles like I did on my Prowler. Thanks in advance. Shadrach