In seeking a better tire management system I've seen tire Durometers that measure relative hardness of tires. Understanding it very subjective to the tire temperature during the measurement, I believe it could be utilized. Does anyone currently use a duromter in their tire management. The club Ford spec tires are Goodyear and Hoosier R600 series tires which are demoted after 10 heat cycles by many and for sale. My desire is track tire perfomance to durometer readings in a effort to maximize tire budget and evaluate true useful condition of used tires that have been " only drive on Sundays".