Great app; could use a minor tweak for traditionalists
All the standard information is available for almost any conceivable setup. Its not currently possible to display all the usual measurements in traditional schizophrenic units at the same time (i.e. gear-inches and speed in English units and development in centimeters), but the info can be easily found.
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Bike Gear Calculator - Bike Gears, Cycling Gear Calculator, Bicycle Gear Calculator