David Noton / Cyclists riding bikes along riverside path at dawn, near Vang Vieng, Laos, March 2009.

Kirkendall-Spring / Close up on mountain biker's foot pedalling, in Cascade foothills, Washington, USA. April 2013. Model released.

Mark Hamblin / 2020VISION / Mountain bikers on upland path on route to Ben Macdui, Cairngorms National Park, Scotland, UK, August.

Jack Dykinga / Mountain Biker stood on a ridge at sunrise overlooking the Grand Canyon, Grand Canyon NP, Arizona, USA

Ashley Cooper / Bikes in bike racks in Amsterdam, Netherlands. A huge percentage of the population cycle in this flat, low lying country. April 2013.

Ashley Cooper / Cyclist on the new CS7 Cycle Superhighway that goes from Southwark bridge to Tooting. London England, UK, October 2010.

Pat Tuson / Bikes attached to railings showing the need for more bicycle racks in the vacinity of the station, Kings Cross, London, England, UK, August 2014.

Pat Tuson / Santander Cycles or Boris Bikes, bicycle hire scheme docking station, corner of Hampstead Road and Euston Road, Camden, England, Britain, UK, March 2016.

Pat Tuson / Santander Cycles or Boris Bikes, bicycle hire scheme docking station with number 29 bus, corner of Hampstead Road and Euston Road, Camden, England, UK, March 2016.

Alex Mustard / Discarded bicycle in the River Nene, Peterborough, Cambridgeshire, England. UK August. The bridge was build by William Cubitt in 1850 and is the only cast iron bridge still in use on a major high sp...

Pete Oxford / Car carrying bikes near volcano, Cotopaxi Volcano, Cotopaxi National Park, Andes, Ecuador

Willem Kolvoort / Cyclists riding bikes along the 'Saaler Bodden' north-east of Rostock, Germany, June 2013.