Originally Posted by cardstock
I am not trying to be a jerk, just FYI. The smallest freewheel you can get is 14 tooth and if you have a fancy BMX specific rear hub you can get drivers as low as 9 teeth. And as far as I know normal 1/8" chains work on all of them.
a 14t freewheel does require a special sized hub however, one unlikely to be laced to a 700c rim