Originally Posted by
a1penguin
Stealthhammer, you missed at least one model. I have the PD-M520s. I think these are in the 340-350g range, IIRC. If I could convince myself that I could get used to single sided, I the A600s are reasonably priced and light. Reviews seem to be favorable for quality although the shiny gets scruffed/scratched.
The PD-M520s are actually double-sided, but I should have left off the PD-A600s because although they are one-sided, they don't have a usable second side so they really more of a road pedal. They are the lightest one-sided SPDs, and nicest ones that I have found that use SH-51/SH-56 cleats though.