My strategy with using the data is matching up new sets of tires. I usually buy 2-3 new sets at a time. I use the lower spring rates for tires that I will prep and save the higher ones for no prep. I also have a selection of used tires available to me that constantly rotate. I cherry pick the high spring rate tires to purchase for my use. Depending on how much time I have I usually go through with a durometer and only SR test the higher duro tires. Some of what I will refer to as "surprise" tires are a 2 year old tires that were prepped heavy early in life and then sat for several (8+) months. I guess it makes sense that they are hard and most likely don't have many races on them so the SR is high. I've had decent results with these tires.