As you know real trail motorcycles have spoked wheels, like the f800gs, f1200gs, and alike. With time the rear wheel becomes unbalanced, shifted and distorted. BMW retail workshops only offer to sell me a new one. I know that for bicicles and small motorcycles some workshops can do the job, but for the rear wheel of the BMW bikes no one is able to do such a thing in southern europe. I wonder if in Germany, France or other european country someone is specialized in that job.