One quick observation- - - -the wheels appear to be the Firestone RH-5 type, which, regardless of condition, should be swapped for a safer design of wheel. They're the infamous "widowmakers" that have a habit of separating while the tires are being inflated and maiming the people working on them. If there's approximately a 2" wide raised flat spot in the barrel section of the wheel, it's an RH 5. It's been illegal to service them for a lot of years, according to the Department of Transportation. Properly inflated wheel/tire combinations aren't going to explode suddenly without warning, but it's virtually impossible to get a professional tire shop to work on them! DO NOT attempt to add air to an obviously low or flat tire!
Just a heads-up!
Jerry