Dude, whatever you do, don’t inflate these past 40 psi.
OK, you need to get them to 60 psi so the beads will pop. The i23 rims have this funny double bead thingy going on. Put soap on the beads, too. This is a wet job, so wear your bikini and a threadbare t-shirt. The neighbors want to watch. I needed two layers of Stan’s tape, and 3 oz of sealant. The sidewalls were full of little pin holes that took some time and effort to seal up. Once they all filled in, it was golden.