Update on my Nitto 555G2 tire test. I received the tires and installed them April 29, 2016 and no have just over 5,000 miles on them. I found that in order to get a better MPH on my car I needed to adjust the tire revolution per mile higher than the online sites were saying. Finally found the correct setting so that in 20 miles of driving my odometer is off by 0.2.
Now that summer is here and I am driving with the top down frequently I have noticed that the 555G2 has a little more noise than the Motivo that I was running previously. With the top up, about the same, but top down I can hear them more. Nothing annoying, just was looking for the difference as part of my review.
I had a chance to try them at the drag strip. Not as grippy as my drag radials, a little more than the Motivo or the stock Pirelli Pzero that the car came with. My impression is that they are more of a road course/street tire than a drag strip/street tire. The grip in cornering is still noticeable after 5,000 miles.
Tires were supplied by Nitto Tire U. S. A. Inc.
And a fresh detail on the car as well