Tri-Velox Gears Limited (later "Company")
1932-1950s

A web site devoted to this product              Disraeli Gears info about Trivelox

Updated 5.29.2016

An illustration from Alec Shuttleworth and William Hill  1930s patent

Mark Hirst:   "A slow motion video demonstrating the moving cassette of the TriVelox gear. The TriVelox was co-invented in the 1930s by my great uncle, William Hill, as a way of reducing chain wear and delivering more power to the rear wheel. "

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