so i have an XC frame and fork that i'd like to put together. they are both take a standard 1 1/8" headset. the problem is that the steer tube is too short to use with any headsets i have.

i've read about "zero stack" (i know it goes by other names too) headsets, but my understanding so far has been that those always use a larger headtube diameter; ergo they aren't compatible with a standard 1 1/8" frame. is this correct? if not, what's out there?

provided those aren't an option, i think my lowest options are either Crank Bros directset or Extralite Head 2, both under 21mm.