This document specifies the safety and performance requirements for the design, assembly and testing of bicycles and their components for various saddle heights (see Table 1), and provides technical instructions for the manufacturer to prepare instructions for the use and maintenance of bicycles. guide. This document applies to youth bicycles with a maximum saddle height greater than or equal to 635 mm and less than 750 mm, city and touring bicycles, mountain bikes and racing bicycles, including folding bicycles, with a maximum saddle height greater than or equal to 635 mm (see Table 1 and Figure 1) and shared bicycles. This document does not apply to special types of bicycles, such as: delivery bicycles, recumbent bicycles, tandem bicycles, small wheel competition bicycles and bicycles designed and equipped for riding in demanding conditions, such as approved competitions, performances Or stunt bikes. Note: For bicycles whose maximum saddle height is less than or equal to 435 mm, see GB 6675.2; for saddles whose maximum height is greater than 435 mm and less than.