I have ran Nankang AR1's ( 235/35R19 ) for the last 12 months and completed 420 plus laps . I can highly recommend them for Track work , great grip but loud road noise on the street. Would get them again but currently out of stock so looking at the Michelin pilot Sport Cup 2 a lot more expensive but happy to give them a try just waiting on a quote $ today. If anyone else has a specific track tyre they want to give feedback on would be great.