I'm not a seller; I'm posting this strictly for sharing information, so I decided this would do the most good in the vintage section. I stumbled across these tires and thought they might be good for vintage bikes with 4" wheels. These are made for Rocker mini BMX bikes but I have to think they'd be better than the hand truck tires I've seen on minibikes. Max inflation is 60 psi, so they must be sturdy.

Rocker site
https://rockerbmx.com/index.php/onli...t-tyres-detail
https://rockerbmx.com/index.php/onli...o-tyres-detail

eBay - $29-$39/pair w/ free shipping
https://www.ebay.com/itm/NEW-Rocker-...r=562870910048

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