I ran 2.2 Chissels in a local TTC a few months ago. My rig came in 2nd in the mud run (only 3 out of 11 made a full run). And on the Frame twister it came in 5th (5 out of 11 made full run). Both very muddy events (mud run the most obviously). I thought they worked great in mud. But where they lacked was attempting rock after getting them wet and muddy. No grip at that point. At the end of tank trap was a steep rock climb. I just couldn't get any traction on it. I screemed through the whole course to get hung up at the end 5 feet. No working winch kept me from finishing in that event:evil:.
That being said, i think there are much better large mud type tires. The 2.2 Proline tsl's are amazing in most every way. I think most people will be running them in the next local TTC. But that is probably 4 or 5 months away and something better may come out by then?