Originally Posted by
helicomatic
Sorry, a "flip flop" hub describes a hub with two sides to mount a freewheel or cog on. see
http://www.sheldonbrown.com/singlespeed.html#flip-flop
Here's what a BMX flip flop hub looks like:
You can see that the right side threading is a little smaller than the threading on the left, that's the side your freewheel would fit on. Freewheels 16T and larger would go on the larger diameter thread on the left side.
Thank you! That was a delightfully clear explanation! One more quick question - what is the reason for the different size freewheels? In what circumstances would you want a larger or smaller freewheel and does that then mean you have to change which rims you use?