This may seem like a simple question but I'd like a fairly definite answer and I haven't found one just yet. When putting a fixie cog onto a non-track hub is it enough to secure it with a normal, non-reverse thread lockring? I'm pretty sure Sheldon recommends a Loctite thread locker and a lockring as well in case the glue isn't strong enough, but he doesn't say if a lock-ring alone is enough.

Thanks
Daniel

The answer is no.Also,depending on the hub and the cogs width,there may not be enough threads left for a lockring.

Well, it depends on how strong and heavy a rider you are, of course, but in principle if you're going for a suicide hub, you better use loctite and rotafixa the cog onto the hub, before threading and tightening the lockring (note: this is not the same kind of lockring used on track hubs, but I believe you know that already), that too with loctite.

Now, there will be some people who will jump up in outrage at the idea of a suicide hub, but this is what Sheldon Brown himself says about the issue:


Suicide Hub

A rather alarmist and silly name for a freewheel hub used as a fixed-gear hub.
Any standard-thread freewheel type hub will also accept a fixed-gear ("track ") sprocket . This is a common technique for converting an older bike to fixed gear on the cheap.

Despite the silly name, this is no more dangerous than using a freewheel, as long as you keep front and rear hand brakes installed.

I agree, but with the caveat that you really need to keep both brakes, and you may end up walking your bike due to some unforeseen circumstances. Rotafixing is a much better way to secure the cog than loctite, I rode a rotafixed bike for about six months without issue. Of course then, going down a nice big hill my fixed gear began to coast.

I suggest using both.

It is very important to degrease the threads on the hub and cog(i use alcohol)before the loctite and let it CURE 24 HRS before riding.If done properly that cog is not going anywhere,with or without lockring.But as said before,keep a brake.