tyres dont last for ever and its always nice to have a spare lying around
Murphys law, you WILL break 2 more tires when you spend long hours trying to find 2 tires. and then you'll have to order 2 more. Just throw 4 new tires on your buggy, stick your old tires in a pot and let them boil for like 30 minutes, break the CA glue and order new tires for your old rims.