Originally Posted by
A.Sphere
I knew it was a suicide conversion - but without a lockring its a bit too suicide-ish for me. I went up to my LBS and they think a BB lockring will fit. They said they have some in their scrap bin that they can put on for me so I will give that a try. Eventually I will just buy a new rear wheel - or try to build one up (though I have no idea how to do that).
Even with a 'lockring' on it, it will still be suicide-ish. The reason a fixed hub lockring works is because the threading is reversed from the cog. If the cog slips and starts to unthread, the direction of its rotation will
tighten the lockring and keep the cog from unthreading completely.
A BB ring over your cog will provide no such security. The force with which the cog unthreads will just take that BB ring (on the same threading) right along with it. Red loctite or JB Weld that cog on there if you want peace of mind.