The BMW and old XLM spoked tubeless rims all avoided having the spokes go into the well of the rim to enable spoke tensioning. I dont know if Excel or someone make rims like this.
Re the hump, I remember a tubed Tenere I had in the late 80s whose Tagasako? rims for some reason had that bead-locating hump which made changing tyres a pain. I set it up on a crate without a tyre, put it in gear and ground it off.
I suppose a stiff tyre like a Desert run tubeless would stay on a humpless rim better than some, but the Tenere above suggests spoked rims did come with a hump, maybe they still do? Even then, if you visualise non-racing cornering forces on a low psi tyre in sand it does not seem too bad.
Ch
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