Normal
I have a feeling that spinning the tire has something to do with it. I have about 900-1000 miles on mine and I have no tears like yours. I expect to get about 2000 miles. I run 11 psi off road. I did a 130 mile dual sport ride with about 40 miles of pavement from my garage to Mojave and back. Since I was running 60+ on the pavement and the dirt I did run 16 psi for that ride. On hard ground spinning the tire will shred it big time. The rubber is just too soft. Now I have spun mine quite a bit in the desert sand. That wear it, but no chunking.If your riding style includes a lot of spinning the rear and steering that way a trials tire might not be for you. Tires are very subjective and what works for one might not for another.Chris does run a Tubliss system so pinch flats are not a concern. With the weight of my bike and me I'm sure I would pinch out at 8 psi. I've pretty much always used at least 10. Now you are considerably lighter than I and so is your bike. I would try 9 and maybe 8 psi. It will get those other side knobs more involved.
I have a feeling that spinning the tire has something to do with it. I have about 900-1000 miles on mine and I have no tears like yours. I expect to get about 2000 miles. I run 11 psi off road. I did a 130 mile dual sport ride with about 40 miles of pavement from my garage to Mojave and back. Since I was running 60+ on the pavement and the dirt I did run 16 psi for that ride. On hard ground spinning the tire will shred it big time. The rubber is just too soft. Now I have spun mine quite a bit in the desert sand. That wear it, but no chunking.
If your riding style includes a lot of spinning the rear and steering that way a trials tire might not be for you. Tires are very subjective and what works for one might not for another.
Chris does run a Tubliss system so pinch flats are not a concern. With the weight of my bike and me I'm sure I would pinch out at 8 psi. I've pretty much always used at least 10. Now you are considerably lighter than I and so is your bike. I would try 9 and maybe 8 psi. It will get those other side knobs more involved.