svcattle - I'm not 100% sure, but I think your wheels are not the "RH5" 2 piece split in the middle rims as identified in the picture below in the lower left corner of the diagram. Your wheel looks more like the "RH" 2 piece wheel with the one piece continuous locking ring on the outward side of the wheel.

I would suggest re-looking at them to really confirm what you have. I think the "RH" wheels are much safer and still usable, although listed as obsolete in the chart.

PS - The chart was screenshot from this Stovebolt Legacy Tech Tip New Wheels for Advance Design Big Bolts.
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~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
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