Originally Posted by
UnfilteredDregs
So...how does one go about choosing the depth of the rim? I gather that deeper = worse crosswind performance. If so I'd wonder if anyone ever messed with some sort of perforation, akin to a winglet, to recover/minimize parasitic drag...
Sort of. Rim design is also important. The old v-style rims are most aero from a direct headwind, but much less aero when wind comes from other directions (almost always), in addition to handling problems. Newer toroidal and semi-toroidal shapes are designed to be much better in crosswinds (like Zipp and Flo), both from an aero and handling point of view.