PBS defined this classification as "Tricycle 1 (T1) is for athletes with severe locomotor dysfunction and insufficient balance for cycling.
"[1] In 1997, this classification was defined by Alison Gray in Against the odds : New Zealand Paralympians as: tetraplegic - almost no use of trunk, arms and hands".
[2] The Telegraph defined this classification in 2011 as "T 1-2: Athletes on tricycles, who have severe locomotive dysfunctions and limited ability to pedal" [3] The class includes people with cerebral palsy.
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.
[11] At the 2012 Summer Paralympics, events for this classification include T 1-2 Road Race and Mixed T 1-2 Time Trial.