As far as mileage goes? One of the best riders I've seen is Monk. He rides a full wing, darkside. He rides the Arkansas mtns, and is from the area. He has stated that he changes his darkside tires at about 5000 miles. This man rides hard. I'm just saying, mileage is all dependent on how you ride, where you ride, road conditions, etc. No two people are going to get the same mileage. There is more than just "tread depth" that is to consider, when it's time to change rubber. Sidewalls take tons of stress, in hard cornering, and don't show much wear at all. I have 2 spare wheels, one with a darkside and one with an oem tire. I like them both.