...I know what tire I'm getting next: the Schwalbe Big Ben. If these had been available when I bought the Big Apples for my Rock Combo, I probably would have gone for these instead. They seem to be somewhere between a Big Apple and a knobby tire, but a bit closer to the apples than to the knobbies. The apples are great tires and can handle some off-road use if you lower the psi, but they are a little sketchy if you hit sandy stuff. Now I just wish Schwalbes weren't so long lasting so I could hurry up and buy 'em.