Cog Lockring
Can anybody please tell me what type of lockring I would need to get so I can attach the track cog to my old school freewheel type hub. It was originally a multi-gear rear hub. Then I took off the threaded cassette freewheel. I'm looking for a non-track hub lockring. Something I guess is normal threading. Thanks in advance.
P.S Links to where I can purchase them would be great.