ISO 11243:2023

INTERNATIONAL ISO
STANDARD 11243
Third edition
2023-09
Cycles — Luggage carriers for bicycles
— Requirements and test methods
Cycles — Porte-bagages pour bicyclettes — Exigences et méthodes
d'essai
Reference number
© ISO 2023
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Published in Switzerland
ii
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 The restrictions of maximum load capacity for the types of non cycle specific
luggage carrier . 3
5 Requirements and test methods . 4
5.1 General . 4
5.2 Tolerances . 4
5.3 Crack detection methods . . 5
5.4 Sharp edges . 5
5.5 Security of safety-related fasteners . 5
5.5.1 Security of screws . 5
5.5.2 Minimum failure torque . 5
5.6 Minimum requirements for rear luggage carriers to which a child seat could be
attached . 5
5.7 Protrusions . 5
5.8 Rear luggage carriers — Provision for lighting . 5
5.9 Dynamic load tests . . 6
5.9.1 Requirement . 6
5.9.2 General loading method . 6
5.9.3 Vertical test method . 8
5.9.4 Lateral test method . 8
5.9.5 Additional test method for child seat compatible luggage carrier . 9
5.10 Static load test — Vertical load .12
5.10.1 Requirements .12
5.10.2 Test method . 12
5.11 Static load test — Lateral load.13
5.11.1 Requirements .13
5.11.2 Test method . 13
5.12 Static load test — Longitudinal direction . 15
5.12.1 General .15
5.12.2 Requirements .15
5.12.3 Test method . 15
5.13 Drop impact test (only for luggage carriers of plastics or metal and plastics) . 16
5.13.1 General . 16
5.13.2 Requirement . 16
5.13.3 Test method . 16
6 Marking . .17
6.1 General . 17
6.2 Requirements . 17
6.3 Durability test . 17
6.3.1 Requirements . 17
6.3.2 Test method . 17
7 Instructions .17
8 Test report .18
Annex A (normative) Test setup requirements .20
Annex B (informative) Alternative dynamic test requirements and test methods for
luggage carrier .24
iii
Annex C (informative) Examples of luggage carrier configurations .27
Annex D (informative) Test method for child seat compatible luggage carrier option 1 .29
Bibliography .31
iv
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 149, Cycles, Subcommittee SC 1, Cycles
and major sub-assemblies, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 333, Cycles, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 11243:2016), which has been technically
revised.
The main changes are as follows:
— change of Scope;
— the following terms and definitions; “cycle specific luggage carrier”, “non cycle specific luggage
carrier”, “exposed protrusion” were added;
— improvement of Clause 3 and Clause 4;
— improvement of 5.1 and 5.5.2;
— addition of 5.6;
— improvement of 5.9, 5.10 and 5.11;
— addition of 5.12;
— improvement of 5.13;
— improvement of Clause 6, Clause 7 and Clause 8;
— deletion of some annexes and addition of some annexes with changes in the text.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
v
Introduction
This document has been developed in response to demand throughout the world, and the aim has
been to ensure that luggage carrier manufactured in conformity with it will be as safe as is practically
possible. The tests have been designed to ensure the strength and durability of the luggage carrier,
demanding high quality throughout and consideration of safety aspects from the design stage onwards.
The scope has been limited to safety considerations and has specifically avoided standardization of
components.
vi
INTERNATIONAL STANDARD ISO 11243:2023(E)
Cycles — Luggage carriers for bicycles — Requirements
and test methods
1 Scope
This document specifies safety and performance requirements for the design and testing of both non
cycle specific luggage carriers intended for mounting (with or without tools) and cycle specific luggage
carriers mounted on complete cycles. It applies to luggage carriers intended to be positioned above and
adjacent to the wheels of cycles. This document lays down guidelines for instructions on the use and
care of such luggage carriers.
This document does not apply to removable luggage (for example, handlebar bags or baskets that are
not permanently attached).
Toy carrier intended to be mounted on bicycles for young children in the scope of ISO 8098 are not
covered by this document.
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.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
luggage carrier
device, including containers such as baskets, that is mounted and permanently attached above and/
or adjacent to the rear wheel(s) (in the case of a rear luggage carrier) or front wheel(s) (in the case of a
front luggage carrier) of a cycle and that is designed for carrying luggage or children in child seats
3.2
cycle specific luggage carrier
luggage carrier that is removable, designed to be mounted on a specific cycle
3.3
non cycle specific luggage carrier
luggage carrier sold as a separate accessory intended to be mounted on a wide range of suitable cycles
3.4
luggage carrier platform
flat part of the luggage carrier (3.1) upon which loads may be placed or fixed, or the flat top rail from
which panniers may be hung, or the bottom part of a container
Note 1 to entry: The bottom part of a container, for example a basket.
3.5
luggage carrier platform length
L
maximum overall length of the luggage carrier platform (3.4)
3.6
visible crack
crack which results from a test, wherein that crack is visible to the naked eye
[SOURCE: ISO 4210-1:2023, 3.2.11]
3.7
fracture
unintentional separation into two or more parts
[SOURCE: ISO 4210-1:2023, 3.2.4]
3.8
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
[SOURCE: ISO 4210-1:2023, 3.2.3]
3.9
toy carrier
luggage carrier with a part intended for containing a maximum mass of 1 kg and not intended to carry
luggage
3.10
permanently attached luggage carrier
luggage carrier (3.1) which is permanently attached
Note 1 to entry: For example, luggage carrier welded to the frame.
3.11
normal rear luggage carrier
rear luggage carrier supported by fixings to the bicycle frame close to the rear wheel axle
3.12
frame-mounted beam luggage carrier
rear luggage carrier that is structurally a cantilever, fixed to the bicycle frame in front and/or above the
rear wheel
Note 1 to entry: It may also be fixed to the seat post, in addition to the frame, but receives no support from the
bicycle frame near to the axle of the rear wheel.
3.13
seat-post mounted beam luggage carrier
rear luggage carrier that is structurally a cantilever, fixed to the seat post of the bicycle without
additional fixings to the frame
3.14
above wheel front luggage carrier
front luggage carrier with a platform upon which loads can be placed above the front wheel
3.15
low-load front luggage carrier
front luggage carrier that is exclusively designed for carrying a pair of panniers, where the “platform”
is a pair of rails (from which the panniers hang), one each side of the wheel and not more than 200 mm
above the lower points of attachment of the luggage carrier near to the axle of the front wheel
3.16
front mounted container
container such as a basket that is mounted and permanently attached above the front wheel of a bicycle
and that is exclusively designed for carrying luggage
3.17
maximum load capacity
maximum load that can be carried
Note 1 to entry: The restrictions of maximum load capacity are defined in Table 1.
3.18
electrically power assisted cycle
EPAC
cycle, equipped with pedals and an auxiliary electric motor, which cannot be propelled exclusively by
means of this auxiliary electric motor, except in the walk assistance mode
[SOURCE: ISO/TS 4210-10:2020, 3.2]
3.19
platform height
height measured from wheel axis to the luggage carrier platform
4 The restrictions of maximum load capacity for the types of non cycle specific
luggage carrier
Manufacturers of non cycle specific luggage carrier shall take into consideration any restrictions laid
down in Table 1.
For cycle specific luggage carrier, the manufacturer is responsible for determining the maximum load
capacity.
For designs exceeding the capacity restrictions, a risk assessment should be performed by the
manufacturer in particular addressing the effect of the higher load capacity and to identify suitable
measures to address the identified risks.
In Table 1, the maximum limit (if any) for the load capacity is indicated for each type of non cycle
specific luggage carrier that falls within the scope of this document. The applicable requirements and
test methods differ according to the type and maximum load capacity.
Table 1 — The restrictions of maximum load capacity for the types of non cycle specific luggage
carrier
Rear Front
Beam carriers
Low-load
Type of lug-
Normal rear Above wheel
Seat
front Front mounted
Frame-mount-
gage carrier
luggage car- front lug-
post-mounted
luggage container
ed beam lug-
rier gage carrier
beam luggage
carrier
gage carrier
carrier
Restriction of
maximum load
no limit 10 27 10 18 10
capacity,
kg
NOTE Maximum load capacity does not include the battery mass if so equipped.
NOTE Examples of luggage carrier configurations are shown in Annex C.
5 Requirements and test methods
5.1 General
The fatigue tests shall be done on the same sample and fasteners. Static tests and the additional tests
on child seat compatible luggage carriers can be conducted on a new test sample, but if only one test
sample is available, it is permissible to conduct all of the tests on the same sample with the sequence of
testing in the order: dynamic load tests, static tests.
When more than one test is conducted on the same sample, the test sequence shall be clearly recorded
in the test report or record of testing.
If the luggage carrier is made of plastics or metal and plastics, it shall be submitted to the tests in 5.13
after being tested according to 5.9, 5.10, 5.11 and 5.12.
In the strength tests, all components shall be in the fully-finished condition.
The luggage carrier shall be tested using the connecting interface position(s) and type(s) according to
the luggage carrier manufacturer's specifications.
When the manufacturer allows more than one mounting configuration the stiffest and weakest
configuration shall be tested. The stiffness is determined by measuring the largest and smallest
displacement of the each configuration according the method described in 5.11.
The luggage carrier shall be tested with all accessories provided (e.g. lock, pumps, etc.).
For luggage carrier intended to be fitted on an electrically power assisted cycle (EPAC) and designed
to include a battery, the test shall be performed with the maximum battery load [see Clause 7 q)] in
addition to the mass defined in Clause 4.
For maximum load capacity under 27 kg, the user shall be warned that the product is not suitable for
the transportation of a child seat. See Clause 6.2 e).
Permanently attached luggage carriers are not within the scope of this document. However,
manufacturers should take into consideration and apply all clauses of this document except 5.8, 5.13,
6.2 c) and 6.2 e) as a basis of safety requirements.
5.2 Tolerances
Unless stated otherwise, accuracy tolerances based on the nominal values shall be as follows.
Forces 0/+5 %
Masses ±1 %
Dimensions ±1 mm
Angles ±1°
Time duration ±5 s
Temperatures ±2 °C
Frequencies and linear stroke ±5 %
Torque wrenches shall have a maximum permissible relative deviation of ±6 %
Note Unilateral tolerance such as 0/+5 % allows variation to occur in only one direction. The minimum
applied force shall be the standard force plus the maximum permissible error of the equipment. Typically, the
equipment is set at half the tolerance (+2,5 %).
5.3 Crack detection methods
Standardized methods may be used to emphasize the presence of cracks where visible cracks are
specified as criteria of failure in tests specified in this document.
NOTE For example, suitable dye-penetrant methods are specified in ISO 3452-1 and ISO 3452-2.
5.4 Sharp edges
Exposed edges that could come into contact with the rider's or a transported person’s hands, legs, etc.,
during normal riding or normal handling and normal maintenance shall be neither sharp nor designed
such that injuries can arise when the bicycle is used correctly. Spring ends shall be rounded or fitted
with protective caps.
5.5 Security of safety-related fasteners
5.5.1 Security of screws
Any screws used in the internal assembly of the luggage carrier shall be provided with suitable locking
devices, for example, lock-washers, lock-nuts, stiff nuts or thread locking compound.
5.5.2 Minimum failure torque
The minimum failure torque of screws for the fastening of the luggage carrier to the cycle shall be at
least 20 % greater than the manufacturer's maximum recommended tightening torque.
NOTE For example, mechanical and physical properties of bolts are specified in ISO 898-1.
5.6 Minimum requirements for rear luggage carriers to which a child seat could be
attached
Except for luggage carriers using a manufacturer-specific child seat mounting system, a luggage carrier
platform maximum width of 175 mm is recommended for rear luggage carriers to which a child seat
could be attached. And the maximum load capacity of the rear luggage carrier shall be at least 27 kg.
NOTE Some child seats can have other additional attaching requirements.
5.7 Protrusions
This requirement is intended to address the hazards associated with the users of bicycles falling on
projections or rigid components on a bicycle, possibly causing internal injury or skin puncture.
A screw thread that is an exposed protrusion shall be limited to a protrusion length of one major
diameter of the screw beyond the internally threaded mating part.
5.8 Rear luggage carriers — Provision for lighting
The rear aspect of any rear luggage carrier not equipped with an integral rear lamp and reflector can
be equipped with a bracket or brackets, either as an integral part or separate accessory (or accessories)
to allow the fitting of a rear lamp and reflector.
When this requirement is satisfied by the provision of separate accessories, these accessories should be
included when the luggage carrier is sold.
5.9 Dynamic load tests
5.9.1 Requirement
When tested by the methods described in 5.9.3, 5.9.4 and 5.9.5, there shall be no fractures or visible
cracks in any part of the luggage carrier or fasteners and the specifically designed mounting points of
the luggage carrier. The loading methods for 5.9.3 and 5.9.4 are shown in 5.9.2.
NOTE Alternative dynamic test requirements and test methods are given in Annex B.
5.9.2 General loading method
The mounting method for the dynamic load test of cycle specific luggage carriers and non cycle specific
luggage carriers differ. The mounting requirement are given in Annex A.
Attach a specified weight with a mass equal to the maximum load capacity stated by the manufacturer.
The specified weight (maximum load capacity given by the manufacturer) shall be applied in the middle
of the platform = L/2 and W/2 this is illustrated in Figure 1. Tolerance ±5 mm on the position of the
weight. The clamping shall not deform the tube or the platform:
— For luggage carriers with a platform, a weight or weights shall be evenly distributed on more than
70 % area of the top surface of the luggage carrier platform;
— The centre of gravity of this weight shall coincide with this position and also lie within h = 40 mm of
the centreline of the top of the platform;
— Luggage carriers that are suitable for mounting side bags, that side bags can be filled with the balls
that have a typical diameter of 40 mm and 24 g (e.g. squash balls) until reaching the load capacity,
other dimension and mass can be used to obtain a good matching between mass and volume. The
mass shall be evenly distributed;
— The total width of the weight shall not exceed the luggage carrier platform width by more than
100 mm. A weight or weights shall be attached in the best possible way to prevent movement. The
attachments for the weight are not included in the test weight;
— Front-mounted containers or baskets can be filled with balls that have a typical diameter of 40 mm
and 24 g mass (e.g. squash balls), until reaching the load capacity other dimension and mass can be
used to obtain a good matching between mass and volume. The load is secured by a film to avoid
moving during dynamic test.
— For low-load front luggage carriers and low-load rear luggage carriers with special attachments
according to the manufacturer specification, separate weights shall be attached on each side with
no connecting bar. Each weight shall equal half the rated capacity. This can be arranged with a
balanced pair of weights. Each weight clamped around each top rail.
Key
L luggage carrier platform length
W luggage carrier platform width
m weight with a mass, m
h height of the centre of gravity of the mass
Figure 1 — Weight position
If the luggage carrier is equipped with brackets for the fastening of lamps and reflectors an additional
weight with a mass of (200 ± 10) g shall be attached to the bracket(s) during the test. The centre of
gravity of this weight shall be located 20 mm to the rear of th
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