i have new tusk wheels on their way to me. gonna put new tires on them. i did a search but finding info proved difficult. i also know this is a subject that has lots of opionions, but unbiased facts would be appreciated. thanks in advance. i hate changing tires all the time. what rear will last a long time and still has an aggresive tread? i don't ride street, just trails, lots of mud and lots of rock too. irc lasted no time. kenda trackmaster lasted even less time. maxxis dessert it has lasted much longer. what anout the pirelli mt21? the large tread blocks looks like they would last. is the tread depth deep? pirelli's site doesn't give depth specs. dunlop 606? fronts last a lot longer so i can concern myself more with traction. any suggestions? when i read tire descriptions they talk about soft, hard, intermidiate. they are talking about the terrain, not the tire rubber compound, correct? i think i am looking for a tire with a hard compound. is there any way to figure out what tiers have hard compounds?