WTB Velociraptors worked great in all conditions for years and never got flats, ever. Conti 2.3in. Speed Kings, one flat so far, hook up very well in the dustys and up hard climbs. That's after just a couple of months. The Veloc. tires are very heavy, don't recommend them, Speed Kings are very light (saved a lot of grams/pair), but are bit sketchy on rock gardens.