Originally Posted by
mikiek
By float do you mean what I usually describe as slop. The foot can move around more on the pedal? Interesting idea.
Float = capability of pedal to permit a limited rotation of cleat/shoe/foot around an imaginary axis perpendicular to the plane of the pedal surface.
In other words, it lets you move heel in and out naturally as you pedal (if that's natural for your body), without releasing cleat from pedal. Speedplay has the most float of any pedal (last time I checked). Check Speedplay website, I'm sure they can describe this key design feature better than me.