Originally Posted by
RCMoeur
Compounded by the fact that bead failures are ones that are the hardest to boot or temporarily fix due to the stress concentration. This happened to me without warning in the fall of 2022 on my Bike Friday. No brake pad wear into the sidewall, no signs of obvious distress - just a tire that had seen a lot of revolutions on this bike.
I recently binned a couple of Marathons that looked like they were ready to fail at the bead, very few signs of wear otherwise but I know they were a few years old.