A cyclist on a recumbent bicycle rides through the Old Downtown area in Windsor, California, May 4, 2018. Picture taken May 4, 2018. REUTERS/ Stephen Lam 

A man rides a recumbent bicycle as he walks his dog past houses decked out in Union flags and bunting a day before the wedding of Britain's Prince Harry and Meghan Markle in Windsor, Britain May 18, 2018. REUTERS/Toby Melville 

Damjan Zabovnik of Slovenia fixes duct tape to his knees to protect his skin from contact with the rotating back wheel of his high speed streamline bicycle during a training session at the DEKRA test drive oval in the eastern town of Klettwitz, August 31, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the Nevada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. Zabovnik designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 31, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia powers his high speed streamline bicycle during a test run at the DEKRA test drive oval in the eastern town of Klettwitz, August 31, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. He designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 31, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SPORT CYCLING) 

Technician Oliver Lehtonen attempts to catch the high speed streamline bicycle as rider Damjan Zabovnik brings it to a halt during a training session at the DEKRA test drive oval in the eastern town of Klettwitz, August 31, 2013. Zabovnik of Slovenia will attempt to break the world record for human-powered vehicles later this month in the Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. He designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 31, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SPORT CYCLING) 

Damjan Zabovnik (L) of Slovenia hugs his technician Oliver Lehtonen after a successful test run in his high speed streamline bicycle at the DEKRA test drive oval in the eastern town of Klettwitz, August 31, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. He designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 31, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SPORT CYCLING) 

Team technician Oliver Lehtonen (top) watches Damjan Zabovnik climb out of his high speed streamline bicycle after a test run at the DEKRA test drive oval in the eastern town of Klettwitz, August 31, 2013. Zabovnik of Slovenia will attempt to break the world record for human-powered vehicles later this month in the Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. He designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 31, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SPORT CYCLING) 

Team technician Oliver Lehtonen pulls off the launcher to release Damjan Zabovnik's high speed streamline bicycle for a test run at the DEKRA test drive oval in the eastern town of Klettwitz, August 31, 2013. Zabovnik of Slovenia will attempt to break the world record for human-powered vehicles later this month in the Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. He designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 31, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia looks at the road through the mirror below a top window in the shell of his high speed streamline bicycle during a training session at the DEKRA test drive oval in the eastern town of Klettwitz, August 31, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. He designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 31, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia climbs into the front part of his high speed streamline bicycle during a training session at the DEKRA test drive oval in the eastern town of Klettwitz, August 31, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. He designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 31, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SPORT CYCLING) 

Team technicians Joze Krizan (L) and Oliver Lehtonen prepare Damjan Zabovnik's high speed streamline bicycle for a test run at the DEKRA test drive oval in the eastern town of Klettwitz, August 31, 2013. Zabovnik of Slovenia will attempt to break the world record for human-powered vehicles later this month in the Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. He designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 31, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia climbs out of the front part of his high speed streamline bicycle during a training session at the DEKRA test drive oval in the eastern town of Klettwitz, August 31, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. He designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 31, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia runs his training machine next to his bicycle shell in a garage in the village of Skale near Velenje, August 14, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the U.S. Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. Zabovnik designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 14, 2013. REUTERS/Srdjan Zivulovic (SLOVENIA - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia puts on his boots before embarking on a test run with his high speed streamline bicycle at the DEKRA test drive oval in the eastern town of Klettwitz, August 31, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. He designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 31, 2013. REUTERS/Thomas Peter (GERMANY - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia assembles his bicycle in a garage in the village of Skale near Velenje, August 14, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the U.S. Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. Zabovnik designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 14, 2013. REUTERS/Srdjan Zivulovic (SLOVENIA - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia assembles his bicycle in a garage in the village of Skale near Velenje, August 14, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the U.S. Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. Zabovnik designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 14, 2013. REUTERS/Srdjan Zivulovic (SLOVENIA - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia inspects the shell of his bicycle in a garage in the village of Skale near Velenje, August 14, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the U.S. Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. Zabovnik designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 14, 2013. REUTERS/Srdjan Zivulovic (SLOVENIA - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia prepares his bicycle in a garage in the village of Skale near Velenje, August 14, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the U.S. Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. Zabovnik designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 14, 2013. REUTERS/Srdjan Zivulovic (SLOVENIA - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia mounts the gearing onto his bicycle in a garage in the village of Skale near Velenje, August 14, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the U.S. Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. Zabovnik designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 14, 2013. REUTERS/Srdjan Zivulovic (SLOVENIA - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia inspects the shell of his bicycle in a garage in the village of Skale near Velenje, August 14, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the U.S. Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. Zabovnik designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 14, 2013. REUTERS/Srdjan Zivulovic (SLOVENIA - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia poses with his bicycle in a garage in the village of Skale near Velenje, August 14, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the U.S. Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. Zabovnik designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 14, 2013. REUTERS/Srdjan Zivulovic (SLOVENIA - Tags: SPORT CYCLING) 

Damjan Zabovnik of Slovenia inspects the sprocket of his bicycle in a garage in the village of Skale near Velenje, August 14, 2013. Zabovnik will attempt to break the world record for human-powered vehicles later this month in the U.S. Navada desert, pushing his self-designed carbon-fibre recumbent bike beyond 133 km/h. Zabovnik designed his bike in a way that the driver is positioned head first in the narrow shell, powering the back wheel and watching the road ahead through a small mirror that looks out of a window at the top. Picture taken August 14, 2013. REUTERS/Srdjan Zivulovic (SLOVENIA - Tags: SPORT CYCLING) 

Members of the Rolling Thunder New Mexico-Chapter one greet U.S. Army combat medic Shawn Aiken before presenting him with a recumbent bicycle in El Paso, Texas May 20, 2013. Aiken, who served 16 months in Iraq and 13 months in Afghanistan and has been active duty for nearly 10 years, has severe post-traumatic stress disorder. He was injured by an RPG in 2010, which left him with a crushed left hip and a traumatic brain injury. Picture taken May 20, 2013. To match Special Report USA-PENTAGON/PAYERRORS REUTERS/Ivan Pierre Aguirre (UNITED STATES - Tags: HEALTH MILITARY BUSINESS EMPLOYMENT) 

U.S. Army combat medic Shawn Aiken and his family walk out of their home to greet members of the Rolling Thunder New Mexico-Chapter one before being presented with a recumbent bicycle to help with physical therapy in El Paso, Texas May 20, 2013. Aiken, who served 16 months in Iraq and 13 months in Afghanistan and has been active duty for nearly 10 years, has severe post-traumatic stress disorder. He was injured by an RPG in 2010, which left him with a crushed left hip and a traumatic brain injury. Picture taken May 20, 2013. To match Special Report USA-PENTAGON/PAYERRORS REUTERS/Ivan Pierre Aguirre (UNITED STATES - Tags: HEALTH MILITARY BUSINESS EMPLOYMENT) 

U.S. Army combat medic Shawn Aiken stands outside his home to wave goodbye to members of the Rolling Thunder New Mexico-Chapter one in El Paso, Texas May 20, 2013. The group gave a recumbent bicycle to Aiken to help with physical therapy. Aiken, who served 16 months in Iraq and 13 months in Afghanistan and has been active duty for nearly 10 years, has severe post-traumatic stress disorder. He was injured by an RPG in 2010, which left him with a crushed left hip and a traumatic brain injury. Picture taken May 24, 2013. To match Special Report USA-PENTAGON/PAYERRORS REUTERS/Ivan Pierre Aguirre (UNITED STATES - Tags: MILITARY HEALTH BUSINESS EMPLOYMENT) 

Didi Senft, a 56-year-old cycling fan better known as 'El Diablo', poses for the media before riding on his so-called 'guitar bicycle' in Storkow, some 50 km (31 miles) south of the German capital Berlin, April 8, 2008. Didi made the giant 'guitar bicycle' in the shape of a guitar, which measures five metres (16.4 feet) high about 12 metres (39.3 feet) long. REUTERS/Fabrizio Bensch (GERMANY) 

Mike Pierce works out on an exercise bike in a commercial freezer in San Diego, California cooled to -10 degrees Fahrenheit (- 23 degrees Celsius) that simulates the conditions in Antarctica October 24, 2006. Pierce will be competing in the Antarctica UltraMarathon a 100k race scheduled for December 2006. REUTERS/Fred Greaves (UNITED STATES) 

Mike Pierce works out on an exercise bike in a commercial freezer in San Diego, California cooled to -10 degrees Fahrenheit (- 23 degrees Celsius) that simulates the conditions in Antarctica October 24, 2006. Pierce will be competing in the Antarctica UltraMarathon a 100k race scheduled for December 2006. REUTERS/Fred Greaves (UNITED STATES) 

Mike Pierce works out on an exercise bike in a commercial freezer in San Diego, California cooled to -10 degrees Fahrenheit (- 23 degrees Celsius) that simulates the conditions in Antarctica October 24, 2006. Pierce will be competing in the Antarctica UltraMarathon a 100k race scheduled for December 2006. REUTERS/Fred Greaves (UNITED STATES) 

Mike Pierce works out on an exercise bike in a commercial freezer in San Diego, California cooled to -10 degrees Fahrenheit (- 23 degrees Celsius) that simulates the conditions in Antarctica October 24, 2006. Pierce will be competing in the Antarctica UltraMarathon a 100k race scheduled for December 2006. REUTERS/Fred Greaves (UNITED STATES) 

Mike Pierce works out on an exercise bike in a commercial freezer in San Diego, California cooled to -10 degrees Fahrenheit (- 23 degrees Celsius) that simulates the conditions in Antarctica October 24, 2006. Pierce will be competing in the Antarctica UltraMarathon a 100k race scheduled for December 2006. REUTERS/Fred Greaves (UNITED STATES)