I don't know how can I thank you



Thank you so much, for your time.
Ok, guys. I removed a wheel. That corroded part on the wire bead is not that highly visible. It is a small part. I think outer tire will still hold

<<click for the full zoom>>
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My plastic levers are good. No problem with them.

Need 3 to remove the tire. I found techniques. Sometimes can be pilled off a small amount of tyre.

I can't rule out the possibility that a broken spoke punctured the tire.
A few months ago, my rim with motor was on service. The mechanic replaced a motor from the old (broken) rim to the other rim.
Now the rim bellow track is in messy. Maybe the above bolt is greased from service. And other dust/sand dont know where did it come from.

I can clean the rim with a dry cloth and blow away dust with a mini compressor, but that does not guarantee that something will not come out again from inside that double-wall rim.
And inner tube many paths I found, including black path where hole is.


Possible that is rim squeezed it. Ot that cheap tires can broken on paths where they connected.
@99t4 says:
Could be a manufacturing flaw. Sometimes the steel wire tire bead reinforcement doesn't get covered with enough "rubber." Easy for the paper thin rubber there to peel away and expose the steel wire to corrosion. Either that or the rubber was sliced away with (improper) installation methods and tools.
Exactly. Something of that is true.
