I have read a lot about the lack of rear grip on the track and have experienced the same. Goodyear is going to make a track tire to fit the stock fitment. I ordered a set of HRE Competition C22 , rear 19 x 13 (345/35/19 Pzero Corsa Asimmetrico) front 18 x 9 (265/35/18 Pzero Corsa Direzionale). These are suppose to be built 4/19. Matt at HRE said thet have quoted sveral fitments, but this will be the first set they have made.This combo will lower front ride heighth .42 inches and rear 1.02 inches...hopefully giving a little more downforce and grip. The factory wheels I will leave at the track and have the Goodyear DOT's mounted when they are available...I will keep you posted on how it works...and looks!