That's interesting. I always thought of static balancing as being
done with a bubble balancer sitting still on the floor. And any
balancing with the wheel actually spinning I would call
dynamic. They obviously use the terms differently. I imagine it
wouldn't hurt any if you did both for the rear as well, even if it
isn't necessary. The whole premise of on-the-car balancing is that
you don't want to move the tires around. Even if you remove and
replace a wheel, you want to mark it so you put the same lug studs
through the same wheel holes. I would think in modern off-the-car
balancing they should just balance all of the wheels the best they
can regardless of position. I suppose they could use a lower
standard for the rears, but that seems pretty lame to me.
-Steve
At 01:21 PM 11/5/2019, Randall via Shop-talk wrote:
>I don't know that this is relevant, but the manual for my on-the-car
>balancer (an antique so old it actually uses vacuum tubes) talks
>about "static" and "dynamic" imbalance as two different tire/wheel
>conditions. Its sensor only works in one direction, so first you
>check for the tire hopping up and down (which it call static
>imbalance), then for wobble from side to side (dynamic). IIRC, the
>dynamic check is only done on the front axle.
>-- Randall
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