If anyone still needs some wheels for their cart we’ve been offered a couple of Mountain Board trucks.
The axles are only 15″ (380mm) long so you may have to lengthen or replace that.
The wheels have five spokes and are made of seemingly strong plastic. The bearings are free running.
The tyres are marked Runner 200×50, inflate to 50psi although only one of them holds air at the moment… That one is 8″ (200mm) in diameter & 2″ (50mm) wide when inflated.
If anyone can use them please get in touch (email@example.com).
Thanks to Siobhan (& Dominic).