'There is nothing more un-aerodynamic than spheres and cylinders – which is essentially what the human body is – riding a tubular triangulated bike frame design. And then suddenly the regulations were allowing us to create nice aero-formed profile frames,' said Hill.   The final product was revolutionary, its design and shape unique, incorporating a single rear stay, a fork with just one blade and an aerofoiled profile frame.  One complicating factor, though, was that the Barcelona velodrome was (and remains) open-air – so Lotus developed a shape to accommodate the impact of both drag and crosswinds.

https://road.cc/content/feature/check-out-chris-boardmans-olympic-winning-lotus-type-108-294779

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