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If someone would show me that without any background I'd say...too much speed verses a sharp impact with not enough tire pressure for the conditions or tire. Given that sidewalls are dumb and don't know how stiff they are, I'd still say not enough pressure. I don't know what the interior surface area of a given tire is but 30PSI as an example X 300 sq/in as an example = 9000lb of force at the interior of the tire. I'm not convinced that any sidewall on these types of tires are going to add significantly to that. But I could be wrong so just ignore all that. Thinking out loud

Just spent all weekend in the Preserve with @bruinjon, and conditions were perfect 👍

My fat ass is also 220, and I don't ever air down the rear. When it brakes loose on the dirt at street pressure (34psi) it is very predictable and usually fun. The front however gains noticeable line holding ability when dropping from street 35 to dirt 28 and I don't air down every time I hit the dirt either. I spent this last weekend exploring the Mojave Preserve at a very leisurely pace, so I didn't bother to air down at all, no problems. Now if I'm riding at say an @Rogers type pace, dropping the front pressure a bit yields a great advantage in the corners on loose stuff. BTW who's bike is that Eric? I rode the Park City Ultimate Race too and there was some rocks but good grief! 12 psi?

Yeah when you factor in how much these bikes weigh... A small drop in pressure yields big results. I don't think you have to air them down all that far. I've heard the 28PSI rule as well But I weigh 220 and will probably try 30 pounds as a starting point.

Yep. I destroyed both my rims on my '11 GSA doing LAB2V at about 21 psi. Very expensive mistake. After that I never went below 28 psi.

I actually see this happen a lot. Not with motorcycles but on side by sides. I went up to wind rock for Christmas with my RZR Hi lifter and that place is well known for causing people to lose their tires. I ran 4 to 5 PSI higher than what most people recommend and surprise...gobs of traction, no lost tires. And this over some seriously sharp rocks. I covered 40 miles, sweating bullets the whole way because I didn't have a spare. I found the same thing with my mountain bikes where people are recommending pressures that just don't make sense for my body weight. I ignore them and don't have anywhere near the issues they have. I think people like to tease the limits of tire pressure too much sometimes. If low equals good then lower must equal better. I think they end up crossing a line.

My views of the Continental TKC80 on and off road. Some fast dirt section and control slow. Second post but I do follow on FB incidentally.