SirMike1983
Riding a '38 Autocycle Deluxe
The S8 was an extruded duraluminum rim. I believe they were supposed to match up with the high pressure Schwinn "puff" 26 x 1 tires. The corrosion to watch on the durals is the white powdery type, but dural is good material so it's probably fine. I'm unaware of a direct replacement for the 26 x 1 puff tires that replicates them today. It may just end up being a case of swapping in a regular new tire that fits rather than trying to duplicate the puff tires.