Originally Posted by no1mad

Just read the WC 101, and I've still questions. Regarding bike selection, I read where most people preferred mtbs. So I take it that basically any geo that puts the rider in a more upright position is more favorable over a more aggressive, aero position? Or is because the mtbs can run a much wider tire than the road/track bikes can? And how important does chainstay length and overall wheelbase factor in?