So, I've blown two tires in the last 10 rides. That's full-blown 2-3 inch gashes in each. Both rear tires. They were both WTB Motoraptors that came with my bike. I think they're the race version with kevlar beads. They were 2.14's if that matters. http://www.wtb.com/tires_motoraptor.html Both of the cuts seemed to originate in the sidewall and move up into the tread blocks a ways, resulting in instant blowouts.
Here's the problem. My favorite trail goes through an area that Native Americans used to quarry flint out of for their arrowheads as far back as 12,000 B.C. That should tell you something about how hard and sharp the rock is. It's all chert (flint). I obvously need a tire with a thicker, more cut resistant sidewall. I also wouldn't mind going up in size a bit. I need all the help I can get when the climbs get loose and manky. Maybe a 2.25 or 2.3. I think 2.3 is about the max that will fit.
Anyone have any ideas on something that won't blow out every 5 rides? Cost isn't super important as long as they hold up well. The terrain I normally ride is smooth, fast single-track in places and slow, pedal pounding, rock bashing in other places. The knobby moto's seem to hook up ok, so a knobby design with more cut protection is probably what I'm looking for. Any ideas would be much appreciated.