We have experienced 2 tire failures on our tandem in the past few months. The first failure, August, 2014 was of a Continental 4 Season GP 700×25. This tire had about 1035 miles. March, 2015 we had a Continental Gatorskin 700×25 fail in the same manner. This tire had about 550 miles. Both tires had the tire sidewall separate from the bead. We have previously used Gatorskins for at least 10 years without a problem. See attached photos.
We have 40 years of tandem experience and this is the first time that I have seen this type of failure.
I sent the Continental GP 4 season to Bill at Santana and he did not seem concerned about this issue.
I contacted the USA Continental importer about 2 months ago and sent them the Gatorskin tire. I was concerned that Continental might have a manufacturing problem or if we were just unlucky twice. Continental finally responded and said that they did not have any problems and were not aware of anyone else having this problem.
I would like to know if anyone else has had this experience with any brand of tires.