Not Ranked
A lot of balance problems come from pretty wide wheels ( pretty wheels that are pretty wide) where there is a resistance to put weights (ughly) on the out side of the rim and all the weights are on the inside where they aren't visable. This compounds the shake problem because adding all the denser mass lead to one spot causes a cross talk coupled vibration to the outter side---it will be in static balance but gets an wobble at a set higher rotational speed--probably about the rotation rpms of 65-70 mph
Another vibration area can come from the driveshaft as it is very short ( creates higher angle from mis alignment) and the critical speed could be as low as 2000-3000 rpms
Jerry
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