Dowsett began his career at the Maldon and District Cycling Club in the City of Chelmsford. His talent was soon recognised and Dowsett became part of the British Olympic Academy development team. He won the under-23 version of the British Time Trial Championships in 2008 and 2009. In 2010, he rode for American team and won the under-23 European time trial championship. He also won a silver medal in the Time Trial at the 2010 Commonwealth Games.
On 30 October 2012, Dowsett signed with the Spanish for the 2013 season hoping to gain a ride at a Grand Tour. After competing in the Classics season for, Dowsett was selected to ride the Giro d'Italia, his first Grand Tour appearance. Dowsett helped take second place in the team time trial on stage two. On stage eight, a individual time trial, Dowsett set the fastest time to record his biggest career victory to date, setting a time ten seconds faster than the second placed Bradley Wiggins. In June, Dowsett won the British National Time Trial Championships for the third year in a row despite crashing early on in the course. In May 2014 Dowsett set a new British 10-mile time trial record in Cambridgeshire, clocking in at 17 minutes 20 seconds and beating Michael Hutchinson's previous record by 25 seconds. Competing for England at the 2014 Commonwealth Games, Dowsett won gold in the Individual Time Trial. After a long breakaway, Dowsett took the lead of the Tour of Britain on the sixth stage but lost it before the end of the race to Dylan van Baarle and finished eighth overall. His team announced that Dowsett had signed a three-year contract extension with them in September. In December 2014, Dowsett announced he would attempt to break the UCI Hour Record at the Lee Valley VeloPark on 27 February 2015. However, he was forced to postpone the attempt after breaking his collarbone in a training accident. The attempt instead took place at the Manchester Velodrome on 2 May 2015 where Dowsett set a new world record of, beating Rohan Dennis' previous record by almost half a kilometre. Two weeks later, Dowsett won his first ever stage race, the Bayern–Rundfahrt, where he claimed the overall victory a day after winning the Stage 4 individual time-trial. In June 2015 Dowsett clinched his fourth national time trial title. He was named in the start list for the 2015 Tour de France.
Team Katusha–Alpecin (2018–2019)
In August 2017, it was announced that Dowsett would join for the 2018 season. Following the last minute break up of the team in 2019, he initially thought he would rest from professional cycling in 2020 and return to his local Maldon club, to focus on the Olympics and regaining the hour record. Instead he was part of the merger with, which became the new team for 2020.
Personal life
Dowsett suffers from haemophilia and wears a necklace, detailing his medical needs when out riding. Speaking on ITV's Cycle Show in July 2013, Dowsett cited this medical condition as being a key factor in his choosing competitive cycling in his youth, above other sports, because contact games such as football and rugby were considered too risky. His mother inserted knee shoulder and shoulder pads into his school uniform and he wore special trainers. He is believed to be the only able-bodied elite sportsman or woman with the condition. As a result, he has a special exemption from the Union Cycliste Internationale's no needles policy, introduced in 2011, to inject himself with the clotting protein Factor VIII every 48 hours. Dowsett also runs the charitable foundation Little Bleeders to raise awareness of haemophilia. Dowsett also has his own YouTube channel, where he documents his life as a professional cyclist.
