That's what I'm trying to do. I don't have the wheel, otherwise I'd take apart and see what I have. I want to build a wheelset with a Formula track hub, but use hollow axles so that I can still use quick release. The problem is that hub/axle specs for Formula are not readily available. If I go ahead and order the hub and then take apart to see what I have, I might find out that a standard Shimano axle won't fit. At which point I wouldn't be able to return the hub.