Ive got a 07 r6 and am trying to get the sporckets right for WERA Mid Central (TGPR, Nashville SS, Barber, and Road Atlanta). Ive got 15 on the front and 47 on the rear ( -1, +2 ) on it at the moment. Ive got to get it lower for TGPR and barber and up for Road Atlanta without buying every sprocket and only using a few of them. Think its about right for nashville ( still have to see this week at race ). Was wondering if anyone has a combo that works well for these tracks. Any help to point me in the right direction would be much appreciated.