I have a Rockwell Delta from the early 70s and it still has the original tires. Those tires have gone many miles and had many hard cuts with a one inch blade resawing plus a few binds. I bought a set of Urethane bandsaw tires from Rockler but so far they are still in the drawer.
As for Delta they were bought by a Taiwanese company so it is no surprise they dumped parts. I have a bunch of Delta stuff, the bandsaw, Unisaw, Contractors saw, a couple of planers, jointer, scroll saw, lathe, plus a couple of Rockwell Delta routers. All older and all mostly good quality.
One of the planers needs new feed rollers but they are expensive so I picked up another planer for less money. The scroll saw was missing a blade clamp and it took a long time to find a replacement until one showed up on eBay.