Calculating Metres of Development
One could also calculate "gear centimetres," but in practice this is not done. An equivalent system customarily used by continental European cyclists is "metres of development", and measures the distance travelled with each turn of the crank. That is, metres of development is calculated as:
Circumference of drive wheel in metres × number of teeth in front chainring / number of teeth in rear sprocket.
Thus gear inches and development differ by a factor of π plus imperial/metric conversion. To convert from gear inches to metres of development, multiply by 0.08 (more exactly: 0.0798, or precisely: 0.0254π).
Read more about this topic: Gear Inches
Famous quotes containing the words calculating and/or development:
“I know that the right kind of leader for the Labour Party is a kind of desiccated calculating machine.”
—Aneurin Bevan (1897–1960)
“The American has dwindled into an Odd Fellow—one who may be known by the development of his organ of gregariousness.”
—Henry David Thoreau (1817–1862)