So I bought a couple of new tires about a month ago and had them balanced. Put them both on the port side of the trailer. Now I have a crazy vibration that kicks in at 60 mph and then stops when I get to about 70 mph. I assume it is tied to the new tires (Goodyear Endurance) but maybe it is something else. I am thinking about pulling the tires tomorrow and getting them road force balanced? I had regular balancing on them.
Is there something else I should be checking? Any ideas?