[thefro526]

Originally Posted by artdutra04

Or you 3D print the actual shape of your desired wheel, then cast that into a silicone mold to make a flexible mold, then use that mold to case your final wheel.

I've played with urethane casting using 3D printed molds, and I've found this to be the best method for doing volume parts. 3D print a positive part, and then cast a series of silicone molds from that positive. Then use that silicone mold to cast final parts. The nice thing about making silicone molds from positive part is that you only need to print a single part rather than a series of molds.