4
I think the obvious source of the "shimmy" is the rim itself. If the rim is not completely true (which the one you showed is not), it will most likely be felt at the steering wheel. This probably won't affect your performance, but it will affect the feel.
There's an easy way to tell if there's too much play in a tie rod end ... that being, is there ...
2
When you hit a curb three things can happen that cause vibration:
Damage to the suspension or steering rack
The wheel may lose its balancing weights. When tires are put on rims the wheels are put on a machine which spins them to show how the weight is unbalanced, and where to stick on weights to make the weight balanced. If those weights come off you can ...
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