I hope this isn't too much of a dumb question. If it is, I'll feel even dumber knowing that I was unable to answer my own question with the searches I tried!
So I've built a few singlespeed bikes and I'm ready for a fixed gear track bike to take to the local velo. I've got a proper track frame that's spaced at 120mm and I have a wheelset I was planning on using (Mavic GP4's with Mavic hubs) and the rear is 126mm. Can I simply replace the axle with a 120mm axle? I've replace the axle on a few different road hubs, but it was always with the same size. I guess the better question is, how does an actual "track hub" differ from a "road hub?" If it's just axle length, I think this wheelset will be awesome for my intended purpose.
Thanks a million for your help! Looking forward to riding this bad boy