[SkywayWheels]

Dude, you write:

"at high RPMs the wide plastic spokes move a LOT of air. The drag from the spokes is dramatic. "

If you carefully use a dremel or router or other abrasive machine you can shape the spoke without compromising the material.

As with any composite, an error in re-machining can be catasprophic. Be very careful and watch for stress-witnesses.

BMX racers have known for years that Skyway wheels can take abuse. Just sayin'.