No, they're not. That one is probably an 18" wheel off a 1-ton, right? The outer ring has a couple of relieved spots that allows it to be pried and slid sideways off the main wheel once the pressure is deflated and the tire beads are driven away from the flanges with a duckbill hammer or a slide hammer. The locking flanges are very narrow, so inspect them well for damage from mishandling or rust. I ran a 1959 3800 for a lot of years with that type of rim without any issues, but they do require a lot of caution during assembly and inflation.
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
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