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Reply to "Wheel Specs Needed"

Can't you dynamically balance the wheels while they are on the car? Back in the 60's I worked at Sears Automotive and we had a machine back then that attached to the wheel that would indicate how much weight and where to place it. The driven wheel was spun up to 70mph and the tech would use the machine to find the proper weight and location. The undriven wheels used another machine with an electric motor to spin the wheel up to speed. The nice thing about this setup was that you got all the rotating mass balanced and not just the wheel and tire. There is a chance that the brake drum or brake disk will add some unbalance to the rotating system. I have not seen such an on-the-car-system for many years, but they may exist somewhere.
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