Hi,

The impact has bent the butt seam at the joint, IMO it can
be bashed back closer together. Filler may work or it may
continually work its self loose, wheels are flexible things.

To me it looks like the impact was very near the joint, and big.

The burst tyre front wheel probably took a bigger clobbering than
the rear wheel, but survived because it hit away from the joint.

Personally I clean up the edges and use relatively flexible
epoxy, just to stop the gap filing up with brake crud.

The only further observation I'd make is stick with wired
tyres (not folding) for the wheel and it should be fine.

Only a (o)ver(l)y careful person would retire it, IMO.

rgds, sreten.