for track use.
Have a look at Extreme tyres.
they do 3 or 4 track compounds.
vr2 is a semi slick tyre.
r5a compound will overheat on trackdays after 2 laps. ( very soft )
Ideal for sprinting ..
I use r7a compound on my Audi TT and they will last half day no problem. ( I also use them as...