All The Six Fifty Bees Thread! (650b, 27.5 etc.).

that's the top of the rim, yeah? It's a U-shape + you can't see the back of it. Only the top and right side.

    ↓ eyelet                         👀
   _-_
       \
        |

I did manage to trick my brain into seeing what you're seeing though. It's the 45° bit between the flat top and the vertical side tricking you into thinking it's a flat top with offset eyelets:

     ↓ eyelet                       👀
    _-____
   |      |