Not uncommon. Duals on a tractor designed for singles. Driving on a gravel road. Outside dual runs on the grader windrow, lever arm is so large either the axle shaft or the outer wheel bearing goes. When I worked for Case IH our combine final drives were very weak for the operator who wanted to add his own bin extensions, then drive home with a full bin, corn head, duals, and run that outer dal on a grader windrow. Life calculated in seconds.