My bike has always had a flip-flop hub installed. I recently decided I would like to try using the fixed gear side. I purchased an All-City 17T x 1/8" Track Cog and an Origin8 Standard Track Cog Lock Ring.
Only after the parts arrived did I realize my hub's fixie side already has a lock ring! Now I have two lock rings. I'd like to use the new Origin8 lock ring (black, left), but I'm a little confused about which direction/orientation the lock-ring should be installed.
Both lock rings seem to be compatible with my threads and could potentially work. However, the new lock ring has a fairly dramatic tapered end visible when viewed from the side. It seems to be quite a bit asymmetrical. In researching that asymmetry I realized even the old/original/stock silver lock ring is asymmetrical! It's more subtle than the Origin8 lock ring, but one end is flat and one is slightly tapered for both the old and new rings.
Naturally, I did not note the orientation of the original lock ring before I removed it.
I feel it's customary/typical for a device to be installed so that the branding and instruction text faces out and is not hidden. That feels wrong in this case though. Doing that here would create a small gap between the cog and the lock ring's tool divots/holes/notches.
I found a Global Cycling Network video ('How To Change A Track Bike Or Fixie Sprocket') where they say (linked to exact time)...
Our lock ring is not symmetrical. One side is recessed and the other is flat. You want to fit the flat side against the sprocket
I'm assuming the advice from GCN applies equally to all track cog lock rings. Should the Origin8 lock ring be installed:
- recessed/tapered side against the cog (text visible)
- flat side against the cog (text hidden)