I originally bought these tires (Desert IT) for theTexas National Enduro but it turned out we went to the Missouri National Hare Scramble. I decided to still run this tire combo. I think it was a great choice. The race course consisted of deep sand, sharp rocks, mud, ruts, hills, off camber, just about everything. It hooked up well everywhere except for some of the smooth rock that felt like I was on ice. I did practice ride for 2 days prior to the race and the tires held up well. The rear is pretty much destroyed now are the race but overall held up very well under the extreme conditions of the three days. I'm going to try the SI at home in Minnesota.