inside a Pinion gearbox

PINION P1.18 gearbox is a transmission for bikes that is constructed as a spur gear with two partial transmissions axially parallel, one with three gears, and the other with six gears. The multiplication of three six relations gives 18 real speed gradually spaced and ideal ergonomically, with a 11,5% jump between gears, achieving an overall gear ratio of 636%.

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