two-speed

adjective

(of a transmission system) having two settings
(of an economic system) allowing one sector to grow at a faster rate than another

Fig. 14 is a sectional view of the “Hub” two-speed gear, the chain-wheel or free-wheel clutch being omitted.

For the full enjoyment of tandem riding, therefore, a two-speed gear is a necessity, while a three-speed gear is better.

Two-speed and three-speed gears are now very commonly fitted to cycles.

This arrangement gives six spindle speeds, and double this number is obtained by using a two-speed countershaft overhead.

The gear-ratio of a two-speed gear is the ratio of the high to the low gear.

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