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・ Keira dynasty
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・ Keiran Hyde
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Keirin
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・ Keirra Trompf
・ Keirrison
・ Keirsey Temperament Sorter


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Keirin : ウィキペディア英語版
Keirin

is a form of motor-paced cycle racing in which track cyclists sprint for victory following a speed-controlled start behind a motorized or non-motorized pacer. It was developed in Japan around 1948 for gambling purposes and became an official event at the 2000 Olympics in Sydney, Australia.
Races are about 2 kilometers long: 8 laps on a 250 m track, 6 laps on a 333 m track, 5 laps on a 400 m track. Lots are drawn to determine starting positions for the sprint riders behind the pacer, which is usually a motorcycle, but can be a derny or tandem bicycle. Riders must remain behind the pacer for a predetermined number of laps. Initially it makes circuits at about , gradually increasing to about . The pacer usually leaves the track approximately 600–700 meters before the end. The winner's finishing speed is around .
Competition keirin races are often conducted over several rounds with one final. Sometimes eliminated cyclists get the opportunity to try again in the repechages.
==World championships==

Keirin has been a UCI men's World Championship event since 1980 and a UCI women's World Championship event since 2002. Danny Clark of Australia and Li Na of China were the first UCI world champions. The 2013 men's and women's world champions are Jason Kenny and Becky James of the United Kingdom.

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「Keirin」の詳細全文を読む



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