You need this instead: https://www.ezvacuum.com/shop-vac-caster-foot-d-8581500-for-5-gallon-etc-1-pk.html and
https://www.ezvacuum.com/shop-vac-castor-foot-sv-85620003.html
The wheels would be these: https://www.ezvacuum.com/shop-vac-genie-ridgid-craftsman-metal-shank-caster-wheels-420-42-00-4-pk.html