Originally Posted by
xB_Nutt
I have used Speedplay Frogs and the x zero (or something like that) for road bikes. I think there is to much unrestricted side to side float with Speedplays for riding fixed. Also the cleat design is not very low profile on the road pedals. I would recommend some Crank Bros pedals for fixed gear riding as they allow for float, but you have a much more solid feel to the attachment of the cleat to the pedal. Plus you can get into the Crank Bros for a lot less money.
The Speedplay X are different than the Zero. By design, it doesn't have a positive end to the float range like the Zero does. You had the wrong pedal.
Watch the Tour de France or any other major cycling race, you will see 45% Speedplay Zeros, 45% Dura Ace, and maybe 10% LOOK pedals.
By the way, Lance Armstrong famously pulled out of some Dura Ace pedals at the start of his Time Trial in 2007 (I think). That won't (can't) happen with Speedplay Zeros.