But some projects need big, beefy wheels, and these custom cast aluminum wheels certainly make a statement. Mostly, “Watch your toes!” To be honest, [Brian Oltrogge]’s wheels are an ...

Alloy wheels are rims made from a combination of materials, such as aluminum or magnesium ... Their manufacturing process ...

so the bot builders mold custom wheels with integrated hubs. The four-piece mold was machined out of aluminum to hold the plastic hubs, which were also machined but could easily have been 3D-printed.