Originally Posted by
aggiegrads
When I think about the profile of a tire mounted on a too-wide rim, I envision a “flattened” vs round profile. This would result in higher forces applied axially (pressure times larger area) and a proportional loss of lateral force which keeps the tire seated on the bead.
And yet I’ve read that you get a better aerodynamic profile with a wide rim and tire near the rims width. So somehow that works.