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・ Three-point hitch
・ Three-point lighting
・ Three-point locking
・ Three-point play
・ Three-point stance
・ Three-point turn
・ Three-quarter back
・ Three-Quarter Ton class
・ Three-Ring Marriage
・ Three-section staff
・ Three-sector theory
・ Three-Self Patriotic Movement
・ Three-Sided Coin
・ Three-Sixty Pacific
・ Three-source hypothesis
Three-speed bicycle
・ Three-spined stickleback
・ Three-spired cathedrals in the United Kingdom
・ Three-spot nudibranch
・ Three-stage quantum cryptography protocol
・ Three-stage-to-orbit
・ Three-star rank
・ Three-state bus
・ Three-state logic
・ Three-state solution
・ Three-stratum theory
・ Three-streaked tchagra
・ Three-strikes law
・ Three-striped dasyure
・ Three-striped flycatcher


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Three-speed bicycle : ウィキペディア英語版
Three-speed bicycle
The three-speed bicycle is a bicycle that uses internal hub gears at the rear wheel hub to provide three gear ratios. Typically, in low gear, the rear sprocket turns faster than the wheel; in middle gear, the rear sprocket turns at the same speed as the wheel; in high gear, the rear wheel turns faster than the sprocket.
Three-speed hubs have been in use since the early 1900s. Though they are heavier than comparable derailleur systems, internal-gear hub systems generally last longer and require less maintenance. During their heyday, three-speed hubs were used in all applications, including racing and time trialling, cargo cycling, utility cycling, and commuting. In many parts of the world, three-speed hubs are still preferred for commuting and other types of utility cycling over derailleur systems.


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Three-speed bicycle」の詳細全文を読む



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