This is now relevant to my interests. I just put 4ea 95% tires on the XFi for $200 mounted and balanced plus disposal. I thought those are tiny tires, but I looked at the spare and it appears to be about 50-series.
I have these:
...and I'm thinking about ganging them together and trimming the stack down to 12". Haven't figured out how to jury-rig an edge roller to add back the clip.
What think you about putting three 1/8" holes in the rim itself and using button-head bolts with a spacer behind for the depth of the lip, then round the cap over the edge of the rim? (needs a picture).
The 11-30 post shows stock hubcaps. How did those disks work out?
Maybe something like this, I've got enough Aluma-panel. Except as I
suggested in 2017 bend up a shark-fin shape on the ends to make an air curtain.