did you try replacing the hub bearings? unless there is a steel/Alloy reinforcement for seating the nipples I would not reuse that rim.
you should really talk with Zip about rebuilding the rear hub.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk