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You could again with the same tyre, new tube. Inflate it just a little, then push the tyre sideways so you can visually check that the inner tube isn't bulging out. You wanna just see the tyre bead and the rim tape. Then inflate fully, test at low speed.
But if you were careful like this before the incident then I'd say the tyre has just stretched too much.
Ndeipi
@99wombats
Having issues with tubed rear tyre - tube got out under bead the other day. I just re-seated tyre (I thought) and tried to ride it and it popped out again within 50 metres. Headed back home but stupidly left tube bulging so the inner just exploded.. have replaced tube and have been v careful to not get it under the bead. Looks ok so far but problem only really appeared after riding it before. However tyre seemed pretty loose on the rim, it’s a Marathon on a Sputnik rim - could any form of tyre wear cause this escaping tube issue? Can the bead stretch? I guess it’s a relatively old tyre, at least 3-4 years old. Few bits of stringy rubber round the bead but no obvious major damage. Rims have just been replaced. Not sure if I just need to be careful during install or shopping for a new tyre.. any thoughts?