Here's one for the suspension people-F/R width?
 

what are the effects of different track in the front and rear? I'm going narrower in a roadracing car-- will that increase oversteer?
party harty and crash there cuz the man will be everywhere!

The wider track in theory should give it more grip so if you have a wider rear track it should increase the tendency to understeer, and vice versa. But spring rates, alignments etc factor in more.