So I'm thinking about doing a track day coming up soon. The only question....do I need tires? I have about 4700 miles on the Michelin Pilot Powers that came on my 07 S4RS. I do a fair amount of commuting, so the center is getting pretty flat but the edges are still pretty meaty. I've only done one track day on these tires and a decent amount of Southern Ohio rides (some decent twisties). I'm no ricky racer so I probably won't be going crazy fast unless I have some amazing breakthrough in my riding. Do I need tires or can I get one more track day out of these tires? I wiped them down with a wet paper towel for better contrast. You can see that the center is down to the wear bars.