Buzzer:
Hmmm spot the deliberate mistake, Buzzer
Although he was provided with one our old tyre fitter at Ballidon quarry never used a cage, he reckoned that it wouldn’t stop the blast if a tyre blew and the days of the locking ring (which could fly off and kill) were long gone by then. Apart from being on the beach at D day the closest he came to harm was when a loaded Aveling Barford dumper ran away downhill and demolished his tyre bay. 
Pete.