My car has 145/70-13 and 155/65-14 Michelins on stock "telephone dial" wheels. I recently discovered a certain lack of emergency stopping power and would like to increase sizes a bit. How would 165/60-13 and 175/60-14 work out? The rear would be about 1/2" taller and the front about the same as now, just more rubber on the road all round.

Or can I go any wider with the stock wheels?

Thanks,

Steve