Jason Kenny of Great Britain competes in the Men's Keirin Finals race on Day 11 of the Rio 2016 Olympic Games at the Rio Olympic Velodrome on August 16, 2016 in Rio de Janeiro, Brazil.

Azizulhasni Awang of Malaysia celebrates after winning the Men's Keirin First Round Repechages on Day 11 of the Rio 2016 Olympic Games at the Rio Olympic Velodrome on August 16, 2016 in Rio de Janeiro, Brazil.

Azizulhasni Awang (bronze medal) of Malaysia wins ahead of Hugo Barrette of Canada the Men's Keirin First Round Repechages on Day 11 of the Rio 2016 Olympic Games at the Rio Olympic Velodrome on August 16, 2016 in Rio de Janeiro, Brazil.

Matthijs Buchli of the Netherlands, leads Sam Webster of New Zealand leads the pack of Francois Pervis of France, Callum Skinner of Great Britain, Azizulhasni Awang of Malaysia, Krzysztof Maksel of Poland and Angel Pulgar of Venezuela during a Men's Keirin First Round race on Day 11 of the Rio 2016 Olympic Games at the Rio Olympic Velodrome on August 16, 2016 in Rio de Janeiro, Brazil.

Joachim Eilers of Germany, Damian Zielinski of Poland, Jason Kenny of Great Britain, Matthijs Buchli of the Netherlands, Azizulhasni Awang of Malaysia, Fabian Hernando Puerta Zapata of Colombia line up behind the derny driver during a Men's Keirin Finals race on Day 11 of the Rio 2016 Olympic Games at the Rio Olympic Velodrome on August 16, 2016 in Rio de Janeiro, Brazil.

Sam Webster of New Zealand, Francois Pervis of France, Callum Skinner of Great Britain, Azizulhasni Awang of Malaysia, Matthijs Buchli of the Netherlands, Krzysztof Maksel of Poland and Angel Pulgar of Venezuela during a Men's Keirin First Round race on Day 11 of the Rio 2016 Olympic Games at the Rio Olympic Velodrome on August 16, 2016 in Rio de Janeiro, Brazil.

Joachim Eilers of Germany prepares for the start of the Men's Keirin Finals race on Day 11 of the Rio 2016 Olympic Games at the Rio Olympic Velodrome on August 16, 2016 in Rio de Janeiro, Brazil.

Matthew Glaetzer of Australia, Michael D'Almeida of France, Jason Kenny of Great Britain, Christos Volikakis of Greece, Azizulhasni Awang of Malaysia, Matthijs Buchli of the Netherlands compete during a Men's Keirin Second Round race on Day 11 of the Rio 2016 Olympic Games at the Rio Olympic Velodrome on August 16, 2016 in Rio de Janeiro, Brazil.

Jason Kenny of Great Britain celebrates winning gold in the Men's Keirin Finals race on Day 11 of the Rio 2016 Olympic Games at the Rio Olympic Velodrome on August 16, 2016 in Rio de Janeiro, Brazil. (

London 2012 - The Keirin race is unique because riders follow a motorised pace bike who leaves the track just over 600 metres before the finish. Here the riders start the gold medal race as the motor bike arrives.