I've had my Cupra for about 3weeks now and I'm actually surprised how high the road/tire noise is in the cabin compared to my Leon X-perience 2017. The X-perience was running 205/55-17 wheels while the Cupra has the standard 235/35-19 with tires rated to 72dB. I'm thinking of changing down to 18" and run 225/40 for a "smoother" driving experience and also getting tires rated to 67-68dB. Has anyone else done this to a Cupra or any Leon? Was there a big improvement? Is it worth doing or just a waste of money?