I saw these tires on www.tirerack.com and they really have great user reviews and tech articles written about them. They are also priced very well. They come in our stock sizes plus some others sizes that forum members have posted to have used. They are also one of only six sets of tires that meet the "extreme summer performance" series. Not even the Pilots are in this category. I even seen where a few users changed from the Pilots to these. They also have great reviews from people using them on the track as well.

http://www.tirerack.com/tires/tires....Potenza+RE-01R

"The Potenza RE-01R was very close behind in lap time and delivered the highest cornering forces of the group. For the first time in our test history, the Potenza RE-01R allowed a driver to exceed 1g (1.003g) on both of his laps on the dry skidpad with our stock BMW 325i".

They also noted in the article that these tires allowed for the best cornering in a wet environment as well.

 

I'm very interested in finding out this information as well. I was looking at these tires a couple weeks ago, but decided to go with KDW2's instead. I just didn't think I could live with the tread wear since I don't have a second set of wheels to mount them on for competition. Does anyone know how they compare with the Azeni 615s? A lot of guys are running those and they can be had for relatively cheap (edgeracing.com).