[ three-speed ]
/ ˈθriˌspid /
a system of gears having three forward gear ratios, especially on a bicycle.
a bicycle having such a system of gears.
having three forward gear ratios.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for three-speed
Two-speed and three-speed gears are now very commonly fitted to cycles.How it Works|Archibald Williams
For the full enjoyment of tandem riding, therefore, a two-speed gear is a necessity, while a three-speed gear is better.