The effects of rim diameter changes are trivial. It's changes in rim
width and offset that are substantial and do cause changes in the
suspension geometry.
A change in offset changes where the kingpin angle intersects the tire
on the pavement. It can make the car much harder to steer, and more
prone to having the wheels turned from bumps in the road (not to be
confused with bump steer).
A change in width all by itself does not change suspension geometry.
However, it can substantially increase loading on the suspension due to
the leverage increase, wear the wheel bearings as a result of this
loading, and make the car very sensitive to body roll by lifting the
sides of the tread off the pavement.
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