With winter around the corner I broke down and replaced my KDWs with KDWSs in the 225 50 16 size. Just can't be careful enough when you're hauling around the kids. I wanted to share my impressions with the group so here it goes:
1) Looks - looking more at the side of the car, the tires definitely look more "poofy" than the stock size as it is wider. It does seem to fill up the fenderwell a tiny bit better than stock. Looking at the car from the rear, the tires don't look that much wider than stock. This is probably because the car sits so high. All in all, I'm not sure whether I like or dislike the look.
2) Ride quality - The thing I like the most is that most of the tire noise seems to be gone. Definitely much quieter than stock. The ride definitely feels softer than with the stock KDW tires too. Once again I'm not sure what to make of this. At times softness is a welcome thing but other times a nice firm ride is what make the car half the fun it is.
3) Handling - With these tires I can't hit the cornering limits that I could with the stock KDW tires and I expected this. The interesting thing to me is that I have a 22mm SP Motorsorts rear sway bar and before the tire swap, I considered the car somewhat "twitchy" when making quick side to side movements like going through a tight S-curve or somewhat rapid lane changes. After the tire swap, the "twitchiness" has to a large extent been negated. Yet another area where my feelings are ambiguous.
4) Wet traction - Unfortunately I haven't had them in the rain or snow yet so I don't have any experience yet in these conditions.
In summary, with the change of tire type and size, I feel like I've transformed my car from one "feel" to another and I don't know which one I like better. At least I have about 30K miles to figure it out.
For those of you thinking about the BAT suspension kit but are worried about ride height and scraping our ground effects (as I am) I think the 225 50 16 size raises the car ~.3 inches over the standard size for my E1. Please correct me if I'm wrong.