To accommodate the quadratic wheels, every aspect of the machine had to be redesigned, including the drive system and frame dimensions. Instead of explaining the process, we recommend watching the video below to understand it yourself.
Did you finish? Great. The square wheels don't actually rotate inside the tubes, which can make it appear even more unusual than it already is. However, this isn't the first time that The Q, the inventor featured in the YouTube video, has attempted to reinvent the wheel. He has previously created bicycles with distinctive features such as "walking" capabilities, tennis ball tires, split wheels, no hubs, and many more. The inventor is known for being imaginative, skilled, and resolute, as evidenced by his numerous videos.
We can't think of any practical use for this bicycle with square tires, but it does make for an interesting design, so why not have it?