I love these R-S3's. I used Falken Azenis RT-215,s and Falken Azenis RT-615 in the past. My car is used a lot on the track. I am an Instructor at the Driveway Austin Track in Austin.
The compound appears to be of an R type as shown by the graining of the tire and lack of tire noise. The grip in dry weather is very good. The Falken 215's were good for the first 3 laps then they would degrade in grip. I found the Falken 615's to be even worse than the 215's. These Ventus R-S3's are far better than the 2 Falkens. The grip is there for much longer the the Falkens.
Even on the limestone laced asphalt in the Austin area they have good grip. There is a section of road that is very slippery even on a hot dry day that cars routinely spin out on. These tires grip well even on this slick section of asphalt.
On the track they work great they make my feel car as though I put $2000 dollars into it. My car is front wheel drive so it really over works the front tires but the R-S3's very well through my 5 to 15 minute stints. With these tires it is a lot easier to go fast and the under steer is reduced as well as oversteer. I am able to apply power when exiting the corners than before. Turn in is also much better.
I have not noticed any problems in the rain. As for noise they generate a little from the tread pattern. The Falken 215 was the quietest tire I ever had.
The R-S3's come with a lot of rubber on them 11/32nd which is just fine for because I also drive my car to the track 6 days a week 48 miles round trip and after 7063 miles.
I try to stay away from directional tires to avoid getting saw tooth due to rolling in the same direction it's whole life. The tread blocks get stair step and the tire can become loud like an off road truck tire but these have not done this! I rotate just front to back and they are still quiet just a hint of tread block noise.
The price is great and I am happy with the wear. I will be buying these R-S3's again and again.