srw
It's a bit more complicated than that...
Trends wise, I think there is a case for moving Fixed and Singlespeed into its own main category now as there seems to have been a resurgence of interest over the past couple of years
Give it another year or so and the fad will blow over.
I don't think the special interests forum is popular enough to split. And I say that as a fan of both hub gears and folders.