Originally Posted by
carleton
The only difference between the Zero and Zero Track is in the pedal (lollipop). There is a ramp that the cleat uses to disengage from the pedal. The Track Zero has little to no ramp on it. It takes a bit more effort to unclip. Sprinters prefer this.
plus this:
"The Zero Track Sprint Special is identical to the Zero Stainless, but has extra-stiff release tension for maximum security".
http://www.speedplay.com/index.cfm?f...home.zerospecs