Originally Posted by Miele Man

Yes, I mean a lockring from a square taper bottom bracket adjustable cup. However, in your case it might not work if the internal diameter of the 11 teeth cog is smaller than that of a 14 teeth cog.

I don't use anything to protect the Delrin cog spacers and I've yet to break one of them in use once the lockring is snugged up against them.

The bike that I just built as a single speed has a cheap lockring holding the spacers and cog in place. I'm putting a better looking lockring on later. Here are two images of that setup.



Cheers