Still having problems with flats on my rear tire.

[Joel Alexander]

So I did the sanding and polishing of the spoke screws inside the rim as Lectric suggested. Put a new tube and 5 days later full catastrophic failure of the rear tube riding at 25 mph. So I had to call an Uber XL to get home. I lost $32 dollars for the uber.

Now, what do you guys suggest? New rim with spokes? New spokes? Motorcycle rim and spokes?
I need to fix this problem asap and permanently because this bike is my only means of transportation.

So I've found the best fix to be upgrading to a motorcycle/scooter tire. They are much heavier on the side walls allowing the bead to stay put.