I was replacing a tube in my rear tire. I'm pretty sure I aligned it right inside the tire. I pumped it up to just inside the max PSI (60). I turned around to look for my wrench and I look back and see a bulge on the side. I head over to see if I can release some air to prevent a blowout but I was too late. It popped.
I was really surprised to see that my rim had a warp or bulge right where the blowout ocurred. Do I have a cheap rim? This was an old 26" Fuji MTB. I had replaced the tubes before on this bike with no problems. I've heard of "double wall" rims. Do I need to upgrade? Thanks.