caveman_01 said:
.... but while you guys are on the subject, how do you remove the free wheel on the hub?
You'll need a freewheel removal tool - your LBS should have a few.
Take the wheel with you, in case it's something odd - there are a few different (although rare) designs out there.
Here's where it gets a bit interesting.
There's two basic types of threaded hub:
a freewheel (or 'suicide') hub, which has just one size thread,
or a REAL track hub, which has two different diameter, different threaded sections.
^^ this one's a flip-flop hub, so you can run fixed on one side, freewheel on the other, or two different sized fixed cogs.
The smaller diameter thread is for a track lockring, and is lefthand threaded - so there's no chance that 'reverse thrust' / skids etc will unscrew the cog.
The first hub lacks this feature, so people generally resort to a metric sh!tload of Loctite, and/or English threaded bottom bracket lockrings, and/or a technique called rotafixing (head over to fixedgeargallery.com for instructions) to keep the cog from unscrewing itself. (It's cheaper and easier than buying a track hub.)
If you're removing a freewheel, the first hub is what you're working with, so do some reading before you put it together or contemplate riding the thing