• gamer@lemm.ee
    link
    fedilink
    English
    arrow-up
    1
    ·
    1 year ago

    This is done by turning the tires inside-out and pushing them through horizontally. You need a machine to do it though because that rubber is very stiff.

      • Akasazh@feddit.nl
        link
        fedilink
        English
        arrow-up
        1
        ·
        1 year ago

        That image just awakened memories from an internet (what seems like) ages ago

    • Greg Clarke@lemmy.caOP
      link
      fedilink
      English
      arrow-up
      0
      ·
      1 year ago

      How does turning then inside out solve the problem of getting them on the post? I can’t picture it in my head

      • jsveiga@vlemmy.net
        link
        fedilink
        English
        arrow-up
        6
        arrow-down
        1
        ·
        edit-2
        1 year ago

        Because the tire is topographically a radially flattened torus, when you turn it half inside out, it becomes a 2D möbius strip. At this point it effectively has only one side. When you push such construct horizontally against a solid, because the z-axis perpendicular to the strip has no negative values (it only has one side), if that coincides with the orientation of the ∇Np of the solid, the z vector wraps around the solid. When the tire snaps to its rest state (inside in), it’s easy to see why it ends up around the pillar.

        This 3D animation demonstrates the concept:

        https://youtu.be/xvFZjo5PgG0