It is firmer, but that's mostly because I was running the pressure a little low below, and now the tire pressure is much higher. i.e. Of course there is a lot less tire than below, so you could expect it to not be as good for potholes? It also feels much more planted cornering, but again that might just be because the tire pressure right now is higher than I had it before. To be honest there still feels like there is plenty of tire even on 18" rims, since the overall diameter of the wheel is so large to begin with. So not like a sedan where they have big rims and small tire height.