I don't know how long their going to last. I have about 200 miles on them with no problems at all so far I'm just wondering for the future. None of the threads I read about my tires have anything on their tire life, only that people are replacing them (stock Mondo's on a Specialized). I'll give it at least a few hundred more miles (or whatever they last for) before heading to the LBS. Thanks for the fast responses.