Why?
Not only will it look funny, it'll also look ridiculous.
You gots ABS? Theoretically might could cause a problem with ABS having different diameter tires. I say it that way cuz I'm not sure how the Civic ABS system works, all depends on the methodology they use.
Also if you were forced to put a donut on, it'll only match the diameter of 1 set of tires, and could present stability problems.
But I still wanna know why you want a larger diameter up front than in the back?
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