longevity is related to several factors not specific to the tire such your driving style, road surface, the type of aggregate used to pave the road, proper tire inflation pressure, proper wheel alignment, and finally to the tire compound itself. tire wear is rated and stamped on the side of each tire. track tires have ratings in the 30s to 40s my current street tires have a wear rating of 300. the higher the number the harder and longer lasting the tire compound and the more milage you can expect from the tire