UCI CYCLING REGULATIONS  16.17.013 Leg and foot rests shall be fitted as necessary, with a secure means of protecting static  lower limbs from all moving parts. Handcyclists must wear shoes for safety measures.  Covered foot rests are not allowed.  16.17.014  In road races, it is mandatory that a handcycle be fitted with a rear safety bar to prevent  the front wheel of a following handcycle from entering the space between the rear  wheels. A safety bar must not exceed the width of each rear wheel tire and all tube ends  closed or plugged. The safety bar must be fitted 15 mm (+/- 2 mm) behind the wheels. It  must be a round tube (at least 18 mm in diameters) made of adequate solid material.  Both tube ends must be plugged. The distance between the ground and the bar axis  must be 280 mm (+/- 10 mm). The structure and assembly of the safety bar must  guarantee that normal bumps, which happen during a race, don’t affect the safe  functioning of the bar (see diagram).  (text modified on 01.01.04; 01.02.09; 01.01.18)  (text modified on 01.01.04; 01.02.09; 01.02.17)  (article introduced on 01.02.17) 16.17.016  Race numbers must be fixed vertically at the back of the handcycle, in a way that allows  the commissaires, teams and neutral service to see it properly during the race. E0121  PARA-CYCLING  75 