Originally Posted by
MudPie
I've used the classic tie-your-foot in strap & clip system and the clipless system. It could be argued that the a tightly cinched strap & clip is more efficient than a modern clipless system in transmitting power during the pull (up) stroke.
I don't think this is true. I bet they are close. The clip-and-strap system also stretches. (If the old system was significantly better, racers would be using it.)