the coopers are a good tire i sell a decent amount of them.. had them on a DD jeep for a while. and the life depends on how you drive them.. i got almost 60k out of mine.. BUT i was not doing burn outs, hard turns, and took turns easy and babied the heck out of them.. how you drive dictates the life dramatically.. One can make a mud tire last 50+ if they drive conservatively.. but the discoverers are good for an easy 60 as long as you dont drive like you are a race car..