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Gear Halpern-Meier Tetrahedron
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A tetrahedron with gears. Unlike the earlier Gear Pyraminx this one resembles the Halper-Meier Tetrahedron.

After his Gear Pyraminx the creator came up with another design of a tetrahedron with gears. In this case the cuts were placed in a different depth which made the small triangle in the center of each face visible. In addition this changes the number of teeth for the edge and corner pieces.
To fully restore the original position, you have to repeat one move 24 times, that is, the corner has to be turned around 28 times.
This puzzle allows a special move were two opposing edges are moved the same time.
Edge length: 76 mm
Weight: 32 grams (a true leightweight)

In 2020 a mass produced version "Gear Pyraminx Magic Cube" hit the market, including one with a transparent body. See images 6-12.



Thank you to the following people for their assistance in helping collect the information on this page: Andreas Nortmann, Lawrence Cuthbert.


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