Originally Posted by
CactoesGel
So one of the advantages of Speedplay pedals is the lower stack height. But you can really only take advantage of that using 4-hole shoes (no shim). I've been searching but can't seem to find a list of 4-hole shoes. Can anyone point me to the right direction here?

That's not entirely accurate. With a standard 3-hole shoe using Speedplay Zeros,
the stack height is 11.5 mm. The next lowest is Look Keo Blade 2, with a stack height of 13mm. It is true, though, that the lowest stack height is obtained by going with a Speedplay specific sole, which would yield a stack height of 8.5mm.
You can find a list of Sidi-approved shoe manufacturers
here.