147
NASA invented wheels that never get punctured
(www.zmescience.com)
This is a most excellent place for technology news and articles.
Puncture resistant, not puncture proof. Tubeless sets with sealant can take multiple punctures before losing too much air ans/or sealant.
Also larger punctures don't get sealed by the sealant alone, but you need to fill the hole with something like rubber plugs
Puncture proof would mean that they can't be punctured or that puncture had zero effect