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there's a big piece of the equation. I've destroyed a medium rear in I think 5 or 6 races running 20-23s. medium+ I did 20 races (3 of them 25 minute GTUs) plus I think 6 practices and a track day this year. current rear has 6 track days on it, all at tracks easier on tires than NHMS and the right side it close to being done. either gotta change it after practice or after GTU/HWSS. Granted I never changed any suspension settings with the medium which I would probably do if I was gonna run a medium again.
being smooth and weighing nothing also helps me.