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• The bike must be a vehicle with a front wheel steered by a handlebar and a rear wheel driven by a system comprising pedals and a chain by the legs moving in a circular movement,
• The wheels must be of equal diameter, between 70 cm and 55 cm, and must have minimum 12 spokes.
• The bike's maximum length should be 185 cm, and maximum width 50 cm.
• The bike's minimum weight should be 6.8 kg.
• The peak of the saddle must be at least 5 cm behind a vertical plane passing through the bottom bracket spindle.
• The saddle must be between 24 cm and 30 cm in length.
• The distance between the bottom bracket spindle and the ground must be between 24 cm and 30 cm.
• The distance between the vertical passing through the lower bracket spindle and the front wheel spindle must be between 54 cm and 65 cm.
• The distance between the vertical passing through the bottom bracket spindle and the rear wheel spindle must be between 35 cm and 50 cm.
• The maximum internal distance between the front fork ends is 10.5 cm, and of the rear stays 13.5 cm.
• The frame must be built around a main triangle, constructed of tubular elements (that may have non-circular cross-sections) such that the form of each encloses a straight line.

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