Originally Posted by
icemilkcoffee
Are you trying to put a 11t small cog on the 7403 freehub? The 11t small cog does not work with freehubs with full length splines. It only works with freehubs with splines that stop short of the end:
It's not an 11-tooth. I know that for sure. I'm pretty sure it's a 12-tooth. And I'm not trying; I succeeded, so it's definitely not an 11-tooth. My freehub looks different from the two you pictured here. It has threads on the end, intended, I believe, for the old style cassette. I understand this was a transition-period hub meant for both styles.