Tim Brummer, a much accomplished engineer and owner of Lightning Cycle Dynamics, the fasted production bikes on the planet, discusses the misperception that taller  wheeled recumbent bicycles make a for a faster machine. He even shows that smaller sized wheels can make for an increase in speed……

or

Read the Transcription!!

Ian Simms, of Greenspeed, augments this notion with the discussion and charts that you can find HERE.

btw: It is also important to note that the small wheeled Moulton is banned from racing by the UCI……..