2:1 is too spinny for most of the courses they create out there. I ran a 32x15 last year on my 26er. I'll be running a 29er this year and I think I'll start with a 32x17. If that's not enough, I'll go 33x17 or 32x16. I know there are a lot of guys out there running ridiculously high gear inches. What's cool (or not cool) is that they change the course every week, so one week it might be 80% flat hardpack and turn into a dirt crit, and the next week they throw in ALL the climbs and soft dirt sections. So you never really get to dial in that "perfect" gearing, and at the same time you might get lucky. Either way, it makes for a good challenge and good conversation over beers after the race.