## Chapter XVI TRICYCLE 

## Definition 

16.16.001 The tricycle is a vehicle with three wheels of equal diameter. The front wheel, or wheels, shall be steerable; the rear wheel, or wheels, shall be driven through a system comprising pedals and a chain. 

16.16.002 Recumbent pedal tricycles are not permitted in UCI para-cycling competitions. 

(text modified on 26.06.07) 

16.16.003 A tricycle with two rear wheels shall conform to UCI construction and measurements for a bicycle, including the bottom bracket, seat tube and saddle position, but excluding the rear triangle. 

16.16.004 A tricycle with two front steerable wheels shall conform to the general principles of UCI construction and measurements for a bicycle, including the rear triangle. 

16.16.005 Wheels of the tricycle may vary in diameter between 70 cm maximum and 55 cm minimum, including the tire, using conventional cycle components. Modified hub attachments may be used if necessary. The width of tricycle double wheels may vary between 85 cm maximum and 60 cm minimum, measured at the centre of each tire where the tires touch the ground. 

16.16.006 If a tricycle two-wheel rear axle does not have a differential, only one wheel must be driven, due to the different speeds of the wheels in bends. 

16.16.007 A tricycle shall not measure more than 200 cm in length and 95 cm in width overall. 

16.16.008 To facilitate easy mounting by the rider, the tricycle top tube may slope down rearwards, with the limit being parallel with the down tube. 

16.16.009 The two wheels of a tricycle may be offset a maximum of 10 cm either side of a centreline which passes through the single wheel and the frame top tube. 

