I'm not really in the know how of what hubs have 20/24 holes for track...
What about Mack hubs?
Also available in low flange version.
@Tijs started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I'm not really in the know how of what hubs have 20/24 holes for track...