Originally Posted by
Vixtor
Track lockrings are smaller in diameter and there thread pitch is also different from a bb lockring. Only the lockring part of the threads are reverse threaded, the cog part is the regular righty tighty.
lulz....
@sillygolem.
You got it, that's pretty much the general idea.
I am not sure rather or not if 16t metric BMX freewheel exists though. The most common sizes for metric BMX freewheel are 14 and 15, even some 13. Though, none of them will fit on an ISO/English threaded hub.
Just stay away from metric and you'll be fine.