Still on 215 fronts? If so you now have too little rear rubber so need to decrease those fronts.
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.
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either a 205 or to maintain the factory 30mm difference a 195.
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The car is more neutral
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(IMO) with a 20mm difference but of course arguably safer with the 30mm.
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If you want to see the effects on the sidewalls of the fitting check the third from last picture in my garage.
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Same rims all round
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(15x7) and look how the rear sidewall
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(225) has much more of a curve to it in comparison to the front
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(205).
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It's beautiful to drive.
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