On the website of a wheel manifacturer, I can find the following specs about the cog compatibility of their track wheels:
Our track hubs are then compatible with threaded track cogs of Shimano 1.29” x 24 specification.
Is this possible? I am skeptical, because I can't find any cog that has this kind of threading. For reference,
- EAI cogs specs show "standard 1.370"x24tpi English threading"
- Shimano cogs specs say "ISO 1.375" x 24 tpi"
I suspect the specs on the track hubs refer to the lockring threading instead, because that's the only measure I can find through a Google search that actually corresponds, see https://www.worldwidecyclery.com/products/shimano-dura-ace-track-cog-lockring-1-29-24-tpi-left-hand-thread
If I am right and that's the case, what's the threading on the track hub I should assume for the actual cog?