Keirin

thumb|right|300px|KEIRIN Logomark – "racing track" – 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.

right|thumb|300px|Derny publicity material thumb|Derny Taon 125, 1955/1956 thumb|650cc Triumph TR65 Thunderbird "Stayer" first used at [[Leicester Velodrome in 1982 and now at Herne Hill Velodrome. Note the roller at the back and stood-up riding position that distinguish a Stayer from a true Derny.]]