speed gear
noun
an adjustable gear for driving a machine at various speeds.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use speed gear in a sentence
Fig.8 shows another European design, in which a variable-speed gear is used.
The auto slowed down, as the low-speed gear came into play, and bowled along under a stretch of shady trees.
The Motor Boys Overland | Clarence YoungHe threw in the second speed gear and in a little while had lessened the distance between the auto and the motor-cycle.
The Motor Boys Overland | Clarence YoungThe next instant the auto fairly sprang forward, as Jerry threw on the high-speed gear and opened wide the flow of gasolene.
The Motor Boys Overland | Clarence YoungWith its four-change speed-gear a motor cycle seems better adapted for easy and economical travelling than the human machine.
A Book of Exposition | Homer Heath Nugent
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