Winnetka , 91306

Low profile tires will give you a harder ride than the original size that came on your car. This will not have much other effect on the suspension of the car, it might causes some components to wear somewhat faster due to the extra work caused by the stiffer tire not absorbing as much energy as the softer tire did. The amount of this extra wear on things like shocks would probably be small enough that you couldn't really measure it, maybe a 10% shorter life.
Low profile tires will affect handling and braking but there isn't a single answer for all cars.