Had the rear tire go flat again. So I have swapped ot out for a Bell freestyle bike tire with Kevlar @ fibrer.
Doesn't actually say what the tire width is but that it will replace 20" with a lot of different widths....
I also swapped the tube to a Bontranger self-sealing tube.
Lets see if it leaks now ???
We have lots of things here in the desert that can puncture tires.