I have a 2010 Specialized Hardrock Sport Disc. The Fast Trak LK sport tires (26 x 2) that came with it IMHO are not bad on both pavement and trails with the reduced knob height but I preferred to put slicks on as most of my riding is on pavement. I replaced the Fast Traks with Michelin City Tires. Put them on my other bike ..a Gary Fisher comfort bike ..a year ago and like them...no flats..but are a few grams heavier than the FT's. On the Hardrock I put the 26x 1.85 size Michelins. On the GaryFisher I have 26 x 1.4's . Why did I go for the fatter Michelin's on the Hardrock? In that I use both bikes primarily for fitness. I ride everyday year round so weight is not a huge concern to me but are important factors to most cyclists which I can understand.. I have had great experience with Nimbus Armadillos on my comfort bike but found the same durability and puncture resistance on the Michelins at a lower price.