[sportzkrazzy]

The polyurethane material is definitely the way to go. We tested pretty much everything out there and that was the most durable, highest traction materiel we could find for manipulating both totes and rcs. The trick is keeping them clean. Wiping them down in between in match does the trick. The best thing about it is that you can get for any much any size intake roller you need maxing out at 4 inches. We just stretched it over a 4 inch andymark performance wheel because that's what we had laying around at the shop. It required no adhesives just relied on the friction between the materiel and the hub to hold it and it worked great. The only thing we did was machine it down drastically to save weight. 179 Used them as well at IRI and they 3d printed plastic hubs for them. Originally they tried to make them out of abs but the hubs where not holding up do to the loads and impacts however after they switched to pla they held up great. Maybe someone from 179 can provide a little more incite on printing methods ie infill, wall thickness,and print direction.