The vehicle is 4-door 206 I think. if so, your car's original tire size is 175/65/14. if you install a smaller or larger tire than the diameter of this tire. You mislead your km counter. If it is large, there may be rubbing into the fender. the vehicle's stance changes. etc.
It is best to get the original coil spring, but for the 15 rims, the tire suitable for your vehicle is the 185/55/15 tire size of the 206 gti.
If it wears 185/65/15, I doubt if it fits in the fender, the vehicle rises close to 4 cm, that is 3.8 mm more than the actual diameter.