Quote Originally Posted by Eden View Post
Very, very rarely - they really are a liablility on a race bike - though you will find that the pros get their bikes tailored to the day that they are riding them on. If they are riding a very flat course they will have a very different bike from when they are riding a mountainous one, both in gearing and other things as well. For most of us mere mortals, we need to find the setup that gives us the most flexibility to do all tasks.
Yep, but they do use them at times and the rest of us can neither do the tailoring of a bike for each ride nor have the fitness and power/weight ratio of the pros.