Tandem is a para-cycling classification for cyclists that require a sighted pilot for a non-sighted rider.
PBS defined this group as "Athletes who are blind or visually impaired compete with no classification system.
Members of the classification panel must not have a relationship with the cyclist and must not be involved in the World Championships in any other role than as classifier.
[7] Classification often has three components: physical, technical and observation assessment.
[7] Below are some historical world records for this classification in the 200m men's Indoor track / Flying start.
Karissa Whitsell and Mackenzie Woodring (pilot) compete in Beijing Summer Paralympics on September 07, 2008
Tandem cyclists get their medals at the 1996 Summer Paralympics
Australian tandem cyclists Terri Poole (right, vision impaired) and Sandra Smith (left, pilot for Terri) show off the gold medals they won in the 1km time trial and the 3km pursuit at the 1996 Atlanta Paralympic Games
Australian cyclists Sandra Smith (pilot, on front) and Terri Poole (vision impaired, on back) race their tandem on their way to one of their two gold medals on the track at the 1996 Atlanta Paralympic Games