You are correct that a cog has less threads than a freewheel. In practice, however, freewheels thread on very strongly onto track hubs. It's safe to do.
There are crappy hubs where the threads can be stripped, but there it doesn't make any difference whether you use a cog or a freewheel - the material of the hub's shell is too weak and each will strip the threads.
Originally Posted by
illdthedj
well.... dosn't a freewheel cog have more threads than a track cog? im just imagining the freewheel would only screw half way or 3/4s way onto the track hub...
i dunno, i just wanna make sure my buddy is safe and a bike shop isn't just telling him "oh yah its cool" when it isn't lol
im stilll sort of bike-newbish, but hes even more newb than me and asks me for info so im trying to make sure things are cool and he isn't being duped.