Quote:
Originally Posted by jhv48
It balances all the rotating mass, not just the tire and wheel.
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I don't doubt it solved your problem and that the process has its place in the big toolbox of car solutions. It's usually boosted for two reasons: It's quicker because the wheels don't have to be demounted (translation: lazy shop wants to shove cars through faster) and it "balances the whole rotating assembly." Well... if your hub and rotor or drum aren't balanced the way a machinist would consider them balanced, you've got other problems and wheel weights aren't likely to be a long-term solution.
The rotating mass that ISN'T tire and wheel is negligible at road rotation speeds. You'd have to have a disc rotor that was visibly misshapen, or a bad hub or bearings, for them to have much effect on road vibration. Few such cases would be curable by tire balancing. That, taken with the lower precision of the technique overall, makes it at best a special case option. Glad it worked for you, but I'd never have a daily driver balanced this way, much less something lightweight and intended to be driven fast.
BTW, the OP said he "left his old wheels at the shop" - I'm not sure any of the comments about frozen spinners or whacking them the wrong way applies. I don't know what he means, to be honest...