Originally Posted by
gregm
A view from the outside of the same hub:
Looks about normal for a loose-mounted cogset where the driven cog bears all of the drive torque.
Coincidentally, since we're be discussing distribution of loads, the Campy MK 2 cassettes or Shimano models that use cogsets where the cogs are riveted together in clusters or, in some cases, mounted to a splined spider distribute the loads from the driven cog across a much larger surface area that eliminates those nasty looking intentations. They're a pain to clean compared to loose cogs, but they don't tear up the cassette carriers.