Rainbow jerseys are up for grabs as para-cycling stars return to Rio de Janeiro for the 2018 UCI Para-cycling Track World Championships.
The Great Britain Cycling Team will be in action at the scene of so many British triumphs at the 2016 Paralympic Games.
Two reigning triple world champions will head to Brazil - but they will not be defending their titles as a duo.
Sophie Thornhill teamed up with Corrine Hall in Los Angeles in 2017, with the pair winning gold in the individual pursuit, 1km time trial and sprint.
Thornhill, 22, will reunite with her regular tandem teammate Helen Scott for the world championships - at the venue where they won Paralympic gold in 2016.
Likewise, Hall will once again pilot Lora Fachie - another combination that became Paralympic champions in the Rio Olympic Velodrome.
Megan Giglia did not compete at the 2017 UCI Para-cycling Track World Championships in the USA - but made a huge impact at the 2016 world championships - winning gold in both the individual pursuit and the 500m time trial - and will be keen to win back her rainbow jerseys in Brazil.
Crystal Lane-Wright returns to the track after winning bronze in the road race at the UCI Para-cycling Road World Championships in South Africa last year while Katie Toft makes her world championships debut for the Great Britain Cycling Team.
One of sport’s greatest streaks is on the line in Rio de Janeiro.
13-time world champion Jody Cundy has never been beaten in the kilo at the world championships with a run that goes back to 2006.
Cundy claimed Paralympic gold in the Rio Olympic Velodrome in 2016 in the 1km time trial and will be the red-hot favourite to win the title again.
The kilo provided just one of Cundy’s two gold-medal winning moments at the Paralympics - with his other title coming in the team sprint alongside Jon-Allan Butterworth and Louis Rolfe.
The trio will be in action again in Rio - looking to win back the world title they claimed in Montichiari in 2016 after Butterworth and Rolfe did not compete in Los Angeles twelve months ago.
Jon Gildea won two world titles in Los Angeles last year and heads to Rio for his third world championships.
The 39-year-old is the reigning individual pursuit and scratch race champion and heads to Brazil in a rich vein of form.
As with the women, a pair of tandem world champions will look to retain their titles with different partners this year.
James Ball and Matt Rotherham won gold in the 1km time trial and sprint in the USA - but new combinations will be in action in Rio.
Rotherham will pilot 10-time world champion Neil Fachie while Ball will be piloted by Pete Mitchell, himself a six-time world champion having won all of those titles alongside Fachie.
Steve Bate and Adam Duggleby will team up once again, looking to claim their first-ever world titles.
The two-time Paralympic champions have never won a world championship medal on the track - but did add silver in the time trial at the UCI Para-cycling Road World Championships to their honours last year.
There are first call-ups to the UCI Para-cycling Track World Championships for Blaine Hunt, Ben Watson and Will Bjergfelt - with Watson and Bjergfelt having competed at the UCI Para-cycling Road World Championships in Pietermaritzburg last August - and a return to the Great Britain Cycling Team for Jaco van Gass.
Great Britain Cycling Team for the UCI Para-cycling Track World Championships, Rio de Janeiro, Brazil
Lora Fachie (piloted by Corrine Hall)
Sophie Thornhill (piloted by Helen Scott)
James Ball (piloted by Pete Mitchell)
Steve Bate (piloted by Adam Duggleby)
Neil Fachie (piloted by Matt Rotherham)
Jaco van Gass
The Rio Olympic Velodrome in the Barra Olympic and Paralympic Park will play host to the 2018 UCI Para-cycling Track World Championships.
British cyclists won 12 medals on the Brazilian boards - including eight gold medals - at the 2016 Paralympic Games.
The velodrome’s 250m track is made of Siberian pine, banked to an angle of 12 degrees at its shallowest point and 42 degrees at its steepest point. The venue has a capacity of 5,600.
Rio de Janeiro has a population of around 6.5 million and is in the south-eastern strip of the country’s Atlantic coast. The city is known as the Marvellous City and is home to Sugarloaf Mountain, the world-famous Maracana Stadium, Guanbara Bay and the statue of Christ the Redeemer.
Thursday 22 March
1pm - 4.45pm
Women’s C2 and C3 3km individual pursuit qualifications
Men’s C1, C2 and C3 3km individual pursuit qualifications
6pm - 11.50pm
Women’s C4 and C5 500m time trial finals
Men’s C4 and C5 1km time trial finals
Women’s C1, C2 and C3 3km individual pursuit finals
Men’s C1, C2 and C3 3km individual pursuit finals
Friday 23 March
1pm - 4.45pm
Women’s B 3km individual pursuit qualification
Men’s B 4km individual pursuit qualification
Women’s C1, C2 and C3 500m time trial finals
Men’s C1 1km time trial finals
6pm - 9.50pm
Men’s C2 and C3 1km time trial finals
Women’s B 3km individual pursuit finals
Men’s B 4km individual pursuit finals
Women’s C1-2-3 10km scratch race final
Men’s C1-2-3 10km scratch race qualification (if required)
Saturday 24 March
1pm - 4.10pm
Women’s C4 and C5 3km individual pursuit qualifications
Men’s C4 and C5 4km individual pursuit qualifications
6pm - 10.40pm
Women’s C4 and C5 3km individual pursuit finals
Men’s C4 and C5 4km individual pursuit finals
Women’s B 1km time trial finals
Men’s B 1km time trial finals
Women’s C4-5 10km scratch race final
Men’s C4-5 10km scratch race qualification (if required)
Sunday 25 March
2pm - 6.45pm
Women’s B sprint qualification and quarter-finals
Men’s B sprint qualification and quarter-finals
Mixed team sprint qualification
Men’s C1-2-3 15km scratch race final
Men’s C4-5 15km scratch race final
8pm - 10.50pm
Women’s B sprint semi-finals and finals
Men’s B sprint semi-finals and finals
Mixed team sprint finals