I doubt that is the cause of the problem. The blower weighs only about 10 pounds, and you put more load on the rear wheels when you push down on the handle to raise the front wheels when turning around. The rear wheels have ball bearings that are probably rated for hundreds of pounds of loading. If the problem is with the bearing, then it either needs lubrication or is faulty. My little WORX electric mower wheels squeek like heck, and it's just because they rub on the supports.