Originally Posted by MadMan2k
I was under the impression that flip-flop BMX hubs had freewheels on both sides, so that you can use either LHD or RHD depending on preference.
They have threads on both sides. Most of the time big threads no one side and smaller on the other. This way one side is 15-really big and the small side is 14-13. And you can get the freewheels according to LHD or RHD.