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RE:bump steer? what is it?
When you hit a bump (especially a sharp edged bump) and your suspension
deflects your front wheels do not stay aligned with the direction of
travel. This in turn causes the car to stray or steer momentarily away
from the direction of travel. This is due to your suspension (bushings,
struts, control arms etc.) not being perfectly rigid and your suspension
geometry and alignment. The degree that your suspension is able to keep
the wheel aligned with the direction of travel will determine how much
bump steer a particular car will have. If you hit a sharp edged bump
with both front wheels at the same time both wheels deflect about the
same and there usually is minimal bump steer. If you hit a sharp edge
bump with one front wheel only that wheel deflects away from the
direction of travel and causes more of a bump steer.