Originally Posted by sillygolem

A suicide works like this:

BMX freewheels 16t and bigger are ISO thread, as are track cogs and old English bottom bracket lockrings.

The freewheel is removed, Loctite is applied to the threads, and the cog and lockring are screwed on.

This is not as secure as the cog/lockring combo on a track hub because these have left hand threads for the lockring. When you backpedal on a suicide hub, eventually the twisting is going to move the cog, and that will loosen the lockring. On the track hub, this rubbing force is in the direction that tightens the lockring.