There are good quality radial tires with tall sidewalls. Big O and Discount have them on hand. Others as well. Some difference with 16 inch wheels or 15 inch wheels but good rubber is out there. For tubeless applications, I seal the rivets that hold the center to the rim with epoxy( yep the glue) warm the rim, get it clean and spread some around and over the head of the rivets. Instant tubeless rims.Chewed up holes for the tube are more work. But with some attention to detail, even those can be fixed and work with modern fill stems. Get the tallest narrow tire you can(close to 31 inch diameter with a 16 inch wheel) and you will be close to freeway speeds. I use 235 75 r on 15 inch on 5.5 inch wide rims. Easy to get and work well.
