pressure testing plumbing. general rule of thumb = filling the pipes full of water, with just a little bit of air, right at the air injection point.
if a test plug or fitting comes loose, it gets fired like a bullet out of the pipe... if you just used all but air in pressure testing. if using water like noted above, if plug comes loose it is dramatically reduced to barely being shot out.
compressed air can hold a huge amount of energy!
many tire repair shops, will refuse dry rotted tires, due to risk of tire explosion.
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the scary apart with tractor tires, is they are not like car/truck tires that get replaced every so many years or miles. but rather last many years, and are at a higher risk of dry rot / surface cracks within the tire itself.