GB/T 3565.1:2022 Safety requirements for bicycles - Part 1: Terms and definitions
1 Scope
This document defines the terms and definitions given in Table 1 related to the safety and performance requirements for the design, assembly and test of bicycles and their parts and components of various saddle heights.
This document is not applicable to specialized types of bicycles such as delivery bicycles, recumbent bicycles, tandems, BMX bicycles, and bicycles designed and equipped for use in severe applications such as sanctioned competition events, performances or stunting.
Note: For bicycles with a maximum saddle height of 435mm or less, see GB 6675.2, and with a maximum saddle height of more than 435mm and less than 635mm, see GB 14746.
Table 1 Maximum saddle height
In mm
Bicycle type City and trekking bicycles Young adult bicycles Mountain bicycles Racing bicycles
Maximum saddle height ≥635 635~<750 ≥635 ≥635
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
aerodynamic extension
extension (or extensions) secured to the handlebar or stem, to improve the rider’s aerodynamic posture
3.2
band brake
brake in which a circumferential band is wrapped around the exterior of a cylindrical drum which is attached to or incorporated in the wheel-hub
3.3
bar end
extension secured to the end of a handlebar to provide an additional hand grip and usually with its axis perpendicular to the axis of the end of the handlebar
3.4
bicycle
two-wheeled (3.63) vehicle that is propelled solely or mainly by the muscular energy of the person on that vehicle, in particular by means of pedals
3.5
bolted joint
components joined together with threaded fasteners
3.6
brake lever
lever that operates a braking device
3.7
braking distance
distance travelled by a bicycle between the commencement of braking (3.10) and the point at which the bicycle comes to rest
3.8
braking force
tangential rearward force between the tyre and the ground, or the tyre and the drum or belt of the test machine
3.9
city and trekking bicycle
bicycle (3.4) designed for use on public roads primarily for means of transportation or leisure
3.10
commencement of braking
point on the test track or test machine at which the brake-actuating device operated directly by the rider's hand or foot or by a test mechanism starts to move from its rest position
Note: On the test track, this point is determined by the first brake-actuating device (front or rear) to operate.
3.11
composite material
component that is entirely or partially made of a non-metallic matrix materials which is reinforced by metallic or non-metallic materials such as short or long fibres, fabric, or particles
3.12
composite wheels
wheel (3.63) assembly containing any composite material (3.11)
3.13
crank assembly
assembly consisting of the drive side and the non-drive side crank arm, the bottom-bracket spindle or the crank shaft, and all components of the drive system fixed on the crank
Example: The chain-wheel set.
3.14
delivery bicycle
bicycle (3.4) designed for the primary purpose of carrying goods
3.15
disc brake
brake in which pads are used to grip the lateral faces of a thin disc attached to or incorporated in the wheel hub
3.16
drive belt
seamless ring belt which is used as a means of transmitting motive force
3.17
dropper seat-post
seat-post used to realize lifting/lowering without adjusting the seat-post clamp during riding
3.18
exposed protrusion
protrusion which, through its location and rigidity, could present a hazard to the rider either through heavy contact with it in normal use or should the rider fall onto it in an accident
Foreword i
Introduction iv
1 Scope
2 Normative references
3 Terms and definitions
Bibliography
Index
