Well here's the left rear wheel cracked, luckly we were not on some big outting this would have sucked and probably an incident would have happened
Removed:
As on the go-kart
The right wheel as mounted on the gokart does not show failure, but once removed you can see edge cracks on the circle.
I decided to replace both rims, and all 8 bolts and nuts also, $97.88 total with tax.
Might have by end of this week.