It’s interesting to see that the rim of a bicycle wheel is essentially made the same way that Jimmy DiResta made the rim of a magnifying glass in last week’s Maker’s Roundup. I guess there’s only so many ways to turn a straight piece of metal into a circle.
Beyond that, there are a lot of fascinating bits in this video, which shows you how an aluminum Campagnolo bicycle wheel comes into existence. Check out the clever use of removable magnets during the assembly process, and the wicked machine that precisely tensions the spokes at the end: