The 19s will provide a harder ride, there is no doubt about this. It's whether or not this bothers you, that's the issue. Some it will, so they stick with 18s. Others still want the bigger wheels but still want some level of comfort so spec the ACC (or whatever it's called these days

) - then there's me who's just specced the 19s as a firm ride doesn't bother me as anything will be better than my current ride (which is very hard but again doesn't bother me).
