There's no good reason for not allowing conversions. They can have shorter cranks to compensate for lower BB (and a track bike can have a longer cranks, thus eliminating the advantage of a tall BB). A wheel falling out of a dropout is unlikely and even so, no less dangerous than the weel that wedges against the seat tube. I have a conversion that has a steeper geometry and tighter wheelbase than a lot of the so-called track bikes out there.

I think it's telling that UCI has no regulation about rear fork ends for track racing.

also no QR allowed for front... learned that when I was still rocking my pos quandos...

i dont know **** about what is, or isnt allowed on the track, however, i would like to know, because riding on an acual velodrome looks like fun.

That is funny that Langsters were mentioned as only sometimes allowed on your track. Our NEW rental fleet is made up soley of Langsters!!! Specialized is local to us, and I think they cut a deal.

I assumed that the Langster was a track bike. Do the Fuji's and Motobecane/Windsor/Mercier fit into the same mold as potentially not being allowed at some tracks?

the cool factor goes between your legs when everyone is in spandex, and getting smoked by a 13yr old! luv