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 Greg Clarke   ( @Greg@lemmy.ca )  to Asklemmy@lemmy.mlEnglish · 2 years ago

How did they get these tires on this concrete post?

youtu.be

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How did they get these tires on this concrete post?

youtu.be

 Greg Clarke   ( @Greg@lemmy.ca )  to Asklemmy@lemmy.mlEnglish · 2 years ago
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how did they get these tires on this concrete post?
youtu.be
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  •  gamer   ( @gamer@lemm.ee ) 
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    2 years 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.

    •  hankteford   ( @hankteford@beehaw.org ) 
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      2 years ago

      Pushing them through what, the 4th dimension?

    •  Arthur Besse   ( @cypherpunks@lemmy.ml ) 
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      2 years ago

      why are people downvoting this amazing answer, lol

    •  Greg Clarke   ( @Greg@lemmy.ca ) OP
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      2 years 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   ( @jsveiga@vlemmy.net ) 
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        2 years 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

        •  WildlyCanadian   ( @WildlyCanadian@lemmy.ca ) 
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          2 years ago

          :(

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