馬鹿親切な奴がどんな質問にも答えるスレ 391

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https://en.wikipedia.org/wiki/Q_factor_(bicycles)

>The Q Factor of a bicycle is the distance between the pedal attachment points on the crank arms,
>when measured parallel to the bottom bracket axle.[1] It may also be referred to as the "tread"
>of the crankset. The term was coined by Grant Petersen during his time at Bridgestone Bicycles.[2]
>The "Q" stands for "quack", a reference to the wide stance and waddling gait of ducks.