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Hyperglide
Hyperglide is the name given to the series of ramps in bicycle derailleur tooth cassette systems. It varies gear tooth profiles, and/or pins along the faces of freewheel or cassette sprockets, or between the chainrings in a crankset, to ease shifting between them. ==Development== The design, developed by Shimano, improves on their earlier Uniglide design (which used beveled gear teeth instead of ramps), and was introduced as part of a commercially viable index shifting system. The Hyperglide ramps, along with laterally floating derailleur jockey wheels, allows for enough "slop" in the system to make indexed shifting reliable, despite variations in shift cable adjustment and manufacturing or assembly tolerances. A Hyperglide freewheel or cassette on a bike with friction shifters can further improve shifting.
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「Hyperglide」の詳細全文を読む
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