[Brandon Holley]

Originally Posted by sdcantrell56

How durable is the urethane specifically in impact? Also was the bolt pattern molded in or was that machined separately?

During some pseudo-tests the wheels have performed well. One wheel was able to support 165 pounds of weight bouncing on it (me bouncing up and down). This was in the vertical (weaker) orientation. We'll be doing more testing this week. The thing the wheels have going for them is the tread will buffer some of the blunt impact force.

The hole pattern on the old wheel we used had clay partially filled in the bolt holes. This allowed for us to essentially have pilot holes that were drilled through on the drill press.

Originally Posted by Bruceb

Where do you get the materials? The silicone and the urethane? What do they cost? Do you cast the wheels with the bearings in the mold or do you machine the wheels later and install them?
Thanks
Bruce

There is a store in Boston that sells www.smoothon.com products. However, you can purchase these online and have them delivered to your shop. To make the wheels you see here it cost us 45 dollars. Silicone is capable of holding a remarkably tight tolerance when using it to create molds. We were able to use the hole in the old wheel which was designed for a press fit (~.874") as is. The bearings were then pressed into the new wheels...simple as that.

-Brando