Originally Posted by Six jours
By what standard? In my experience, the tooth profile of EAI cogs promotes noise and does not release the chain as freely as Suntour, Campy, or Shimano cogs. Additionaly, EAI threading does not perfectly match hubs from any of the above listed manufacturers, resulting in a bit of effort the first time or two the hub is used with the EAI cog. It is normal to see a bit of thread damage and slivers of aluminum after removing the cog, which is a shame if it's a nice hub.
actually the eai is the only cog I have found to be remotely similar to my suntour superbe pro cogs and I love em cheap well made and pretty