I still don't understand the mystery of the setup change going from a bias slick to a "race" radial slick. The only thing of "major" consideration I did to my AS Pontiac/Chevy, ITB Volvo, EP BMW, FP/GT3 Volvo and HP Honda was to add positive caster when going from bias to radial. Final tuning consisted of adjusting wheel spring rates using tire pressures to accomodate balance and turn in. Pretty much every front running fellow competitor that I have had conversations with did the same thing with good results. It must be working as we continue to win races and set lap records in the process !!! I still think that tires that don't crown or recess with pressure changes are the best thing since sliced bread!! Call me lazy and crazy I guess. Maybe our shock valving choices are foreign to some ??? That info I won't share--sorry.