After about 10,000 miles of use (outside and indoors on the Turbo) the bottom bracket bearings on my FSA Gossamer chain set were worn and needed replacement. I had a lot of issues with FSA Mega Exo Bottom Brackets on another bike that never seemed to last more than a few 1000 miles but this design had lasted a lot longer
It was quite hard to read that part number from the bike:
Some internet trawling showed that you needed to replace with a like-for-like unit - namely the FSA BB-6200, this is partly due to the pre-loading design of this (Shimano Hollow-Tech BB have a manual pre-load adjustment
This is the part:
Apologies as it was a bit of a last minute decision to make the video so it's a combination of phone photographs and video
