I tried a 120/90 AT81 (Non Desert) on my recent trip to Colorado-7 PSI. The first day of riding I thought it worked quite well. Trail was moist and good traction overall. As the week went on, it dried out. I had it step out quickly a few times. Just did not seem to like the dry ground. On day 4 I ended up getting a pinch flat and put on my spare MT 43 trials tire. The trials tire was much better everywhere. Today I rode on some hard Missouri clay with rocks. Again it was just average. MT 16 is much better. I guess I should of gave the desert RC a try but it needs to be a lot better to replace the MT 16. The MT 16 just seems to have a lot wider range. The AT 81 did wear very well.
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