We have just gone out of PBP Audax (peloton riding) because we had two faillures of two Continental Gatorskin 28 mm. The tandem is a Comotion Speedster from the easter with rims at 18-622 mm. We think we could have used a too thin rim - the standard which we seller as well as te constructor advised us to use. I am at 82 kg, my stoker is at 46 kg - saddlebag with 4 kg and the tandem. The tandem had been used for 800 km when the rear tire blast. We had gone though small towns in the first night where there where some heavy rain making the visibility difficult. The tarmac in these towns were very bad and with lots of holes. After inspection of rear tire I discovered that the front tire bulged our to the right side of the tire - same side as the blast had been on the rear tire.
Is there a production fault?
Are the ris too narrow for the tire?
The road conditions: should we have used wheels with wider rims for night riding on roads with poor tarmac.
PS: we used 115 psi