Mine came with runflat 18" 245s all the way around. Switched to 20s 255s/295s non runflats. Noticeable difference in ride and interior noise level. Still not that bad though. Road surface has a lot to do with it of course, gotta take that into consideration. You can switch to 17s or 18s and have a quieter smoother ride, but the look will be not so awesome.
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