Ty,
I think you're making this too complicated.
All you need to do (on our cars) is put the largest front tire up front as possible, and but a rear tire on that is about 15% larger, more if you have tons of power.
Our frame can accept a 295mm with our splined bar and minimal steering stops, but I'd only recommend if this is a serious track car. Be realistic now. Too large of a tire takes more heat to work properly...if the heat is not generated, you might as well step down to a smaller tire. Brake rotor sizing works the same way.
There are formulas for what you describe, but honestly, they don't really work for what we do. People outside of OEMs don't have the tire data needed for such calculations; even if you did, it's only a starting point. Most racing teams run the largest tires that rules allow.
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Matt Jones
Mechanical Engineer
Art Morrison Enterprises
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