This is funny - from their website:
Every year we get questions about gearing. A few points:
* If you are at all unsure of your ability to climb steep grades for long distances, use a triple. Compact doubles (34-50, etc.) are a good solution too.
* If you insist on using a standard double (39-53), put the biggest gear on the back that you can. Even fit, professional racers would use a 25t gear in the back. Flatlanders beware!
* The final climb to Mountain Lake is a lot harder with over 100 miles on your legs already.
Sure, a compact or triple would be great, but a standard double and a 25T in back???? A 39-25 would still bust my knees on some of those climbs. A 34-27 ...sure. But to me, a 39-25 is standard for "rolling" terrain....not brutal climbs (especially for those aforementioned "flatlanders").
Maybe I'm just out of shape....