[Dkoning]

I am from team 74 and we did form urethane wheels. We used skyway 8" wheel chair wheels, tore off the rubber around the outside. This gave us our rim. We machined two molds out of some scrap blocks. Placed the hubs into the molds that had a center pin large enough for the center hub. Clamped it down with a plate to hold it tight to the bottom. Then we just hand poured the urethane around the outside. We waited 24 hours and pulled the wheels out of the molds. The urethane held up well. We had good traction on the
HDPE. We ran two regionals with the first set. We decided to put a brand new set of wheels on for nationals. We still could have ran the old ones.