I agree- - - -the "close-up" picture finally provided enough detail to show the narrow locking ring that allows the single-piece outer bead ring to be removed once the tire is deflated and the outer ring is driven down a little to expose the lock ring. Previous pics just didn't provide enough detail. That type of wheel is very safe when it's assembled and inflated properly. Use an inflation cage, or wrap a piece of heavy chain through the hand holes and around the tire, and use a long clip-on inflating hose with a hand valve to slowly inflate the tire while standing a safe distance away.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!