Originally Posted by
prathmann
Based on the picture, that looks like a defective tire unless the sidewall was cut in some way (such as by a brake pad mounted too high or a sharp object on the road that scratched the sidewall).
This was my first thought when I saw the pic. If it is the same wheel and the same type of failure, this would be a good thing to check.
As for tires, I run Gatorskins at full pressure on my road bikes and whatever Performance has cheap at full pressure (or occasionally a bit above) on my commuter. Yet to have a tire blow out.