So about a week after I got my Ludricrous upgrade for my P85D one of my 21" rims was damaged and cracked. Since it was $1200 to replace and since I already had paid $1000 for two new tires from the one pothole I hit and I've only had my car for 6 months, I switched to aftermarket 20" wheels. Unfortunately I'm now noticing a couple of things that I didn't notice before and I don't know how much of it is the Ludicrous upgrade, the wheels (unlikely) or the tires. The tires are Continental ExtremeContact DWS06. They are inflated to 42psi. My first problem is most likely the tires although they do have the same AA/A rating as the Continentals that came with my car. About 1 out of 10 launches traction control kicks in right away and dramatically slows down my acceleration (much more than I would expect). I don't hear anything but I see the traction control light flip on. Is there anything to be done about this other than possibly getting better tires next time? Any recommendations? The next problem is harder to pin down but basically when doing a full launch my steering gets more squirrely than I remember. It feels like I don't have enough weight on my front tires. I don't know if this is the tires or just a consequence of greater acceleration thanks to the Ludicrous upgrade?