Need tire size help!! R compounds!!

Scott @ RA

Used race tires, R-compound tires, slicks, etc are more often NOT worth the headache. There are too many variables to be concerned about....
Like:
A) Are you getting a matching set off of the same car, used in the same session?
B) How many heat cycles are on them? The more they are heated up and cooled down the harder they get.... Also remember some tires get hotter than others (its not likely they will be evenly heat cycled)
Be sure to try to pick out the tires yourself and use a durometer to measure a few different points on the tire, etc.

Generally its just not a great idea to get used slicks, unless either you just don't care, or you know VERY much what you want and what you are doing.... I have seen this practice of getting used tires go wrong more times than it has gone right... Just be conscientious.