Without more instruction they will not let me use R tires. I need three more sessions at the track before I consider R tires. I hope to get three sessions early in 2010. If you want a track tire recommendation I suggest you contact Mothertucker. He tracks his car constantly and he is an instruction for ACNA, BMW and other clubs. He suggested that I not even consider an R tire without more experience. ACNA will not allow drivers without four events under their belt to use R tires.