Movement mildly affected in one arm and one leg on the same side.

Mildly affected movement or coordination in the lower trunk and legs.

Absence of one lower leg from the knee.

Absence of both legs from mid-calf.

The absence of both hands.


C4 riders include those with coordination affected to a low level on one side, in the lower back and legs, or the absence of limbs.

Riders in this class are grouped because they have a compromised start or delivery of power.