Old 09-29-05, 04:27 PM
  #14  
harov3
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Join Date: Feb 2005
Location: Western Australia
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Bikes: Kona Kikapu/hoss deluxe mix, 1950's Malvern Star gent 28" turned into a stealth commuter with drums and a three speed.

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Originally Posted by 2manybikes
Just when you think you've seen it all!

As the rpm of the transmission wheels change, probably centifigal force pushes weights to the outside of the driving wheel and the sides of the pulley get closer together for an effective larger diameter, and the opposite on the driven wheel. No gears to change but a pair of variable diameter pulleys.

To much energy waste with a fiber/rubber drive belt for a bicycle.

Yup that would be it! And just think if you stopped pedaling it would react by changing to its lowest ratio, very helpful when your belting down some hill.
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