Quote Originally Posted by salsabike View Post
Mimi, Erik is pretty wedded to SPDs because the less float, the more efficient the pedaling cycle.
It is simply not true that having less float is more effecient. Your hip and knee has a natural rotation to it, and float just lets your body move naturally, instead of being confined to move the single way its pinned down. Speedplay X2s with unlimited float are very popular in the pro peleton, and you would think those guys would be concerned with effeciency now wouldn't you. While spds bothered my knees, getting in and out quickly was an issue for me, especially when commuting in traffic. I just feel a lot safer with my frogs.