I just bought a used 09 coupe with the upgraded 19" wheel/tire package (225/45s in front, and 245/40s in rear). I LOVE the car! And I love the look of the wheels. However, I'd like it to ride a little smoother and quieter than it does now. I was thinking of moving to 18" wheels with wider tires, and taller side walls. Maybe 245/45s in front, and 265/40s in rear? Or something along those lines. Or maybe the same size all around to make rotating easier?

Any ideas on what you guys have experienced along these lines? I'd love to trade my wheels and tires if anyone is interested. The wheels are perfect.

 

Many Gs with the 19s have moved up to 245/40/19 and 275/35/19.

 

will those sizes give me a taller sidewall and smoother/quieter ride?