I had that happen to me once. I thought it was the tire itself, so I called Supergo, where I got the tire. They asked me if I knew how much pressure my rims could take. ??? Huh? I had no idea that certain rims only take certain pressures. Once I put in a new inner tube, and I blew it up to the pressure I usually used for my old tire (110 psi), I was good to go. I'd only blown the tire up to just past 120 psi when I had the problem.

BTW, my rims are fine- they don't even need truing, so I know it wasn't that...