Never been so happy to have done a workout indoors rather outdoors. So here is what happened:
I had Shasta on the calendar for today. The first four efforts at 200% were all good. The fifth not so much. Right into the sprint my chain dropped.
I enjoyed the Adrenaline while it lasted and put everything back together. I carefully tried it again with the same result. I afterwards went for some easy sweetspot and threshold. Chain stayed on.
Any ideas what could be causing this? Here is the workout
and a few pictures of the front and rear derailer.
For what it’s worth, I did put it off the turbo for a better picture.