When you put different sized tires on your DSM, be prepared for some differences! Lower profile, stiffer sidewall tires with a more grippy compound can be one of the biggest changes you make to your car's handling -- and ride.
Optimally, you should try to keep the diameter of your new tires near that of your old ones, so that the speedometer remains correctly calibrated. However, erring about 5% on either side of the new tire's height will cause you no problems whatsoever. Any more than that, and you'll start to notice discrepancies in your speeds.
On AWD cars, you must have identical diameter tires front and rear.
Fitment Odds 'n Ends