On my 2013 goldwing with a roadsmith kit rear tire cupped on the inside. Been running 25 psi. Had 16000 miles on the bike. Left on a trip last thursday, developed a vibration at 65 mph and up. Had to put new tires on in Jamestown ND. Looks like the tires ride on the inner side of the tread, more than the out side . Can you adjust the tilt of the rear tir