Bikerider
Track hubs are usually narrower in outer locknut spacing (110 or 120). I spaced my 110 Sovos out to 126 without needing to change the axle. The only annoyance is that the chainline is very narrow (this is on an old mountain bike frame). Phil Woods are probably the ultimate and come in many different spacings.
I am undergoing a conversion as well to fixed. My dropout spacing is 126. From your experience, with respect to chainline, how important is hub dimension? The hub I was thinking of using is spaced for 120. I know I can add a spacer to both sides to get the 126, but this does not affect chainline as I understand it. I want to end up with a non-dished flippable wheel- double fixed. I am looking for a new BB to complement whatever hub I decide to use, but would like to have as straight a chainline as possible since I am replacing the whole drive train, including adding Dura-Ace vintage track cranks. the Phil Woods is the only hub that I can find that has a 126 spec. Am I right in thinking that this moves the cog more to the right, which would allow for less alignment problems, and add to a stronger hub since the bearings are more to the outside of the wheel? Thanks in advance.