ZS - Rotted alloy donut.

Rides just over 80kms to get new tyre fitted. Gets train home. Rear rim has rotted. Alloy is flaking away. Spokes rusted. I would say that the bike has had water in the wheel way back. The inner tube had welded to the corrosion. May be able to get away with using a spare rim I have here at home that is steel,