The wheels are made from two layers of 1/2″ Baltic birch plywood, plus hubs for the lower drive shaft and upper bearings. Plywood has durability and strength but the varying density makes it more difficult to balance. A better choice would be particle board, but I didn’t have any on hand and I didn’t want to buy a full sheet just for this.
I sized the wheels so that when the tires are put on the total diameter will be 12″
Watch the first video in this series: https://youtu.be/ZeIlo2T7YMM
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