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@moth
^^^ compare the rouesartisanales article with http://www.notubes.com/literature/BST.pdf
I think they're both right that conventional side-wall hook geometry is mechanically horrible, and what keeps clinchers on rims is not the hook but the bead being stretched tight onto the bead-seat. Stan's 'stored energy' terminology is a bit bollocks, but tyres deforming near the ground contact patch and rubbing on the top of the side wall is a plausible effect that would add to rolling resistance, and something your link doesn't address.