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Twist Grip Shifters

Twist grip speed control started with the first motorcycle, a steam powered oddity made by Sylvester Roper in 1869.  His motorcycle was controlled by a twist grip throttle.  The twist grip for control of bicycle derailleurs was first popularized in the 1960s by the Sturmey-Archer company, famous for their internally geared hub shifters.   Other  makers followed with their own twist shifters, a notable one being the 1990 the Campagnolo twist-grip shifter below.

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