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A typical set up for the mountain bikes is triple front gears and 6-8 rear gears.
A 3 speed box in series with a 6 speed gearbox is comparable. The 50cc racing Kreidler motorcycles had a 15 speed system. With that many ratios available, cyclists often tape a gear chart to the handlebars to remember the best shifting sequence. Gear ratios are plotted on natural log graph paper and the spacing analyzed. An ideal set up has equal spacing and no duplicate ratios. At 16 to 20 hp, enough power is generated for brisk acceleration of a Last Vetter equipped motorcycle weighing 350 lbs.
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