Since you've already replaced the tire and the tube, and I'm going to assume that you've now checked that the bead has been properly seated when you reinflate it, make sure you're not pinching the tube when you reinstall everything, but BEFORE you do this, check your rim strip to make sure that it is completely covering all of the spoke holes. A tube getting "sucked" into a spoke hole will cause it to go boom. Also, I would, just for the sake of it, replace the current rim strip with some cloth tape rimstrip. Good luck!