“The Pinion P1.18 bicycle transmission is constructed as a spur gear with two parallel partial shaft transmissions, one with three gears, and the other with six gears. The multiplication of three by six ratios gives 18 real ratios spaced in even, ergonomically ideal, steps of 11.5 percent. The P1.18 thus achieves a total gear ratio of 636 percent.”
By Valerie August 30, 2013
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