So about 3 days ago I got a random flat tire, I pulled off the tire to check the tube, there was an obvious puncture but no sign in the tire or rim that could have caused it. I put in a NEW tube and thought I was ready to go. About 30 minutes later the tire was flat again. I pulled out the tube and there was an odd bulge/dimple thing going on, and it was on the outer part of the tube so i know it wasn't caused by the nipple holes and yes I do have proper rim tape. So I decided to use an entirely different back wheel, put a brand new tire on the different wheel along with another new tube. Again, about 30 minutes later it was flat.. Different wheel, NEW tire and NEW tube and it goes flat again. I go home and put in yet another new tube, inflate, wait, and sure enough, it goes flat again. I pull out the tube for the fourth time now and it also has the weird bulge/dimple thing going on.. I dont know if I got myself some faulty tubes or if my tire could be affecting the tubes, even though I checked the lining of the tire and rim and everything is smooth and fine. I'm wondering if the way the tube was folded on the box could have put a crease in the tube which would cause a defect when inflating the tube..
here is a picture of the bulge/dimple thing going on, you can see its towards the outside, so not touching the rim..
and heres a picture of the puncture, you can see how i turned it and the hole is more towards the side..