Regulation No. 124-00

Name:Regulation No. 124-00
Description:Wheels - Passenger Cars.
Official Title:Uniform Provisions Concerning the Approval of: Wheels for Passenger Cars and their Trailers.
Country:ECE - United Nations
Date of Issue:2007-02-02
Amendment Level:00 Series, Supplement 1
Number of Pages:30
Vehicle Types:Car, Component, Light Truck, Trailer
Subject Categories:Steering, Wheels and Tyres
Available on InterRegs.NET

Our online subscription service, offering immediate access to our extensive library of global vehicle regulations, standards and legislation. A fully searchable, accurate, user-friendly resource for consolidated regulations that are updated quickly and frequently.

Tell me more | Already a subscriber

Available on SelectRegs.com

Our fast and easy means of purchasing up-to-date global vehicle and component standards and regulations on a pay-as-you-go basis. Pay securely by credit card and your documents are delivered directly and immediately to your computer as PDF files.

Tell me more | Go straight to site

Keywords:

wheel, test, approval, wheels, annex, vehicle, rim, manufacturer, regulation, replacement, type, tyre, number, rolling, components, requirements, tests, production, paragraph, bending, inset, maximum, material, fixing, means, case, rotating, impact, technical, outset, characteristics, diameter, designation, contour, load, authority, granted, nominal, application, extension, mark, corrosion, fitting, disc, approved, additional, holes, part, length, carried

Text Extract:

All InterRegs documents are formatted as PDF files and contain the full text, tables, diagrams and illustrations of the original as issued by the national government authority. We do not re-word, summarise, cut or interpret the regulatory documents. They are consolidated, published in English, and updated on a regular basis. The following text extract indicates the scope of the document, but does not represent the actual PDF content.

E/ECE/324 )
E/ECE/TRANS/505 ) Rev.2/Add.123/Amend.1
February 24, 2011
STATUS OF UNITED NATIONS REGULATION
ECE 124-00
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF:
WHEELS FOR PASSENGER CARS AND THEIR TRAILERS
Incorporating:
00 series of amendments
Date of Entry into Force: 02.02.07
Supplement 1 to the 00 series of amendments
Date of Entry into Force: 30.01.11

REGULATION No. 124
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF
WHEELS FOR PASSENGER CARS AND THEIR TRAILERS
CONTENTS
REGULATION
1. Scope
2. Definitions
3. Application for approval
4. Approval
5. Wheel markings
6. General requirements
7. Modifications and extension of approval for wheel
8. Conformity of production
9. Penalties for non-conformity of production
10. Production definitely discontinued
11. Names and addresses of technical services responsible for conducting approval tests and of
administrative departments

REGULATION NO. 124
1. SCOPE
This Regulation covers new replacement wheels designed for vehicles of Categories M ,
M G, N , N G, O and O .
It does not apply to original equipment wheels or vehicle manufacturer’s replacement
wheels as defined in Paragraphs 2.3. and 2.4.1. It does not apply to "Special wheels", as
defined in Paragraph 2.5., which shall remain subjected to national approval.
This Regulation comprises requirements for wheel manufacture and installation.
2. DEFINITIONS
For the purpose of this Regulation:
2.1. "Wheel" means a rotating load-carrying member between the tyre and the axle. It usually
consists of two major parts:
(a)
(b)
The rim;
The wheel disc.
The rim and wheel disc may be integral, permanently attached, or detachable.
2.1.1. "Disc wheel" means a permanent combination of a rim and wheel disc.
2.1.2. "Wheel with demountable rim" means a wheel so constructed that the demountable rim is
clamped to the wheel disc.
2.1.3. "Rim" means that part of the wheel on which the tyre is mounted and supported.
2.1.4. "Wheel disc" means that part of the wheel which is the supporting member between the
axle and the rim.
2.1.5. "PCD" means the pitch circle diameter of bolt holes.
2.2. "Wheel type" means a wheel which does not differ in the following essential characteristics:
2.2.1. The wheel manufacturer;
2.2.2. Wheel or rim size designation (according to ISO 3911:1998);
2.2.3. Construction materials;
2.2.4. Wheel attachment holes;
2.2.5. Maximum load capacity;

Figure 1
2.7. "Dynamic radius" means the dynamic loaded radius defined as the theoretical rolling
circumference divided by 2Π of the largest tyre to be used on the wheel as specified by the
wheel manufacturer.
2.8. "International Tyre and Rim Standards" mean documents concerning wheel
standardization issued by the following Organizations:
(a) The International Organization for Standardization (ISO) ;
(b)
The European Tyre and Rim Technical Organization (ETRTO)
:
"Standards Manual";

3.1.2.4.
Fixing method of balancing weights;
3.1.2.5.
Necessary accessories (i.e. additional mounting components);
3.1.2.6.
International Standard reference;
3.1.2.7.
Suitable for tubeless tyre mounting;
3.1.2.8.
Suitable valves types;
3.1.2.9.
Maximum load capacity at rolling circumference;
3.1.2.10.
Maximum inflation pressure;
3.1.2.11.
Detail of material including chemical composition (see Annex 4);
3.1.2.12.
Tyre size designations specified for original equipment by the vehicle manufacturer.
3.1.3.
Documentation in accordance with Paragraph 1. of Annex 10 to this Regulation:
(a)
Vehicle characteristics (Annex 10, Paragraph 1.2.);
(b)
Additional characteristics (Annex 10, Paragraph 1.3.);
(c)
Fitting instructions details (Annex 10, Paragraph 1.4.); and
(d) Additional requirements (Annex 10, Paragraph 2.).
3.1.4. Sample wheels representative of the wheel type necessary for the execution of laboratory
tests or test reports issued by the Type Approval Authority.
3.2. In case of application for approval of an identical wheel, the applicant shall satisfy the type
approval authority that the wheel is indeed an "identical replacement wheel" as defined in
Paragraph 2.4.2.
4. APPROVAL
4.1. If the wheel submitted for approval in accordance with Paragraph 3. above meets the
requirements, then approval for this type of wheel shall be granted.
4.2. An approval number shall be assigned to each type approved. The first two digits (at
present 00 for the Regulation in its original form) shall indicate the series of amendments
incorporating the most recent major technical amendments made to the Regulation at the
time of issue of the approval. The same Contracting Party may not assign the same
number to another type of wheel.
4.3. Notice of approval or refusal or extension of approval of a type of wheel under this
Regulation shall be communicated to the Parties to the 1958 Agreement which apply this
Regulation by means of a communication form conforming to the model in Annex 1 to this
Regulation.

5.1.3. The wheel inset/outset (positive for inset; negative for outset);
5.1.4. Date of manufacture(at least the month and year);
5.1.5. Part number of the wheel/rim (optional wheel type).
5.2. Annex 3 to this Regulation gives an example of the arrangement of the wheel markings.
6. GENERAL REQUIREMENTS
6.1. Rim contour shall conform to the International Standard specified by the wheel
manufacturer.
6.2. Rim contour shall ensure the correct fitting of tyres and valves.
6.2.1. Wheels designed for use with tubeless tyres shall ensure air retention.
6.3. Materials used for the construction of the wheel shall be analysed according to Annex 4.
6.4. In the case of identical replacement wheel as defined in Paragraph 2.4.2., there shall not be
any requirement for physical testing as given in Paragraph 6.5. or vehicle fitment checking
as given in Paragraph 2. of Annex 10 to this Regulation.
6.5. The replica replacement wheels and pattern part replacement wheels shall satisfy the
following tests:
6.5.1. Steel wheels
6.5.1.1. Disc wheels
(a) Rotating bending test as per Annex 6;
(b) Rolling test as per Annex 7.
6.5.2. Aluminium alloy wheels
6.5.2.1. One piece wheels
(a)
Corrosion test as per Annex 5. If the process within a production line is always the
same, only one representative test is to be carried out;
(b) Rotating bending test as per Annex 6;
(c) Rolling test as per Annex 7;
(d) Impact test as per Annex 8.

7. MODIFICATIONS AND EXTENSION OF APPROVAL FOR WHEEL
7.1. Every modification of the wheel type shall be notified to the Approval Authority which
granted the type approval. The Approval Authority may then:
7.1.1. Either consider that the modifications made are unlikely to have appreciable adverse effects
and that in any case the type of wheel still complies with the requirements;
7.1.2. Or require a further test.
7.2. Confirmation or refusal of approval, specifying the alterations, shall be notified by the
procedure specified in Paragraph 4.3. above to the Parties to the Agreement applying this
Regulation.
7.3. The Competent Authority issuing the extension of approval shall assign a series number to
each communication form drawn up for such an extension.
8. CONFORMITY OF PRODUCTION
8.1. The conformity of production procedures shall comply with those set out in Appendix 2 to
the Agreement (E/ECE/324-E/ECE/TRANS/505/Rev.2).
8.2. The authority which has granted type approval may at any time verify the conformity control
methods applied in each production facility. The normal frequency of these verifications
shall be once every two years.
9. PENALTIES FOR NON-CONFORMITY OF PRODUCTION
9.1. The approval granted in respect of a type of wheel pursuant to this Regulation may be
withdrawn if the requirements set forth above are not met or if a wheel bearing the approval
mark does not conform to the type approved.
9.2. If a Contracting Party to the Agreement applying this Regulation withdraws an approval it
has previously granted, it shall forthwith so notify the other Contracting Parties applying this
Regulation, by means of a communication form conforming to the model in Annex 1 to this
Regulation.
10. PRODUCTION DEFINITELY DISCONTINUED
If the holder of an approval completely ceases to manufacture a wheel approved in
accordance with this Regulation, he shall so inform the authority which granted the
approval. Upon receiving the relevant communication, that authority shall inform the other
Parties applying this Regulation by means of a communication form conforming to the
model in Annex 1 to this Regulation.
11. NAMES AND ADDRESSES OF TECHNICAL SERVICES RESPONSIBLE FOR
CONDUCTING APPROVAL TESTS AND OF ADMINISTRATIVE DEPARTMENTS
The Contracting Parties to the Agreement applying the Regulation shall communicate to the
United Nations secretariat the names and addresses of the Technical Services responsible
for conducting approval tests and of the Administrative Departments which grant approval
and to which forms certifying approval or extension or refusal or withdrawal of approval, or
production definitely discontinued issued in other countries, are to be sent.

6. Technical Service responsible for carrying out the approval test: ....................................................
7. Date of test report issued by the Technical Service: ........................................................................
8. Number of test report issued by the Technical Service: ...................................................................
9. Remarks: ...........................................................................................................................................
10. Approval granted/refused/extended/withdrawn : ...........................................................................
11. Reason(s) for the extension (if applicable): ......................................................................................
12. Place: ................................................................................................................................................
13. Date: .................................................................................................................................................
14. Signature/Name: ...............................................................................................................................
15. Annexed is a list of documents making up the approval file, deposited with the Competent
Authority which granted approval, a copy can be obtained on request.

ANNEX 3
ARRANGEMENT OF THE WHEEL MARKINGS
Example of markings which shall be applied to a wheel conforming to this Regulation:
ABCDE 5½ J x 14 FH 36 01 99 ab123
This example of marking defines a wheel:
Manufactured by ABCDE
Having a rim contour designation (5½ J)
Having a one piece construction (x)
Having a nominal rim diameter code (14)
Having a non symmetrical location of the well (no mark)
Having a flat hump configuration of the bead-seat area on one side only (FH) − optional marking
Having a wheel inset of 36 mm
Manufactured in January 1999 (0199)
The manufacturer’s part number (ab123)
The rim designation shall include in the following order the rim contour designation, the construction, the
nominal rim diameter code, the location of the well and the bead-seat configuration, as in the example
5½ J × 14 FH. It is also permitted to reverse the order for the first three elements as in the example
14 × 5½ J FH.
The marking shall be at a position selected by the manufacturer. It shall be easily visible and clearly
legible after the tyre has been mounted to the wheel.

ANNEX 5
CORROSION TEST
1. Carry out a salt-spray test as per ISO 9227 for 384 hours.
1.1. Sample Preparation
A surface treated sample, taken from the production, shall be damaged by cross engraving
(ISO 2409:2007) and stone impact (ISO 20567-1:2005) to represent damaging situations during
the normal usage of vehicle (damage shall be in the area of the rim flange and inside the wheel).
1.2. Test Development
The surface treated sample shall pass a salt-spray test, in which the sample and any components
with which is normally in contact are put in upright position into the salt-spray test equipment. The
wheel is turned through 90° every 48 hours.
1.3. Evaluation
Individual measures which may affect the corrosion are to be evaluated (covers, crews, zinc or
cadmium buses, alloy insulating covers, etc.)
The test documentation shall include photos showing the main corrosion points which have been
mechanically washed in order to show the material defects.
There shall not be any significant corrosion after a test duration of 192 hours. After 384 hours the
wheel functionality, the mounting components and the tyre bead seat shall not be adversely
affected by corrosion. This shall be confirmed by a rotating bending test as per Annex 6 or by a
rolling test as per Annex 7, depending on the location of the corrosion.

3. The test is carried out with two percentage values (50% and 75%) of the max moment and on the
basis of the following standards
Coefficient of friction
0.9
Factor of safety
2.0
Nominal cycles per minute
The number of cycles per minute can be the maximum
possible but outside the testing rig resonance frequency.
Aluminium / Magnesium
Steel
Vehicle category
M , M G, N
O and O
M , M G, N
O and O
and N G
and N G
Min cycles with 75% M
2.0 × 10
0.66 × 10
6.0 × 10
2.0 × 10
Min cycles with 50% M
1.8 × 10
0.69 × 10
6.0 × 10
2.3 × 10
Acceptance limits
Shaft displacement less than 10% greater than the displacement
measured after approximately 10 000 cycles.
Technical cracks are not

accepted.
Allowable loss of tightening
Maximum 30%
torque initially applied to the
wheel fixing studs and nuts
4. TEST SCHEDULE FOR WHEEL FAMILIES
Wheels of a wheel type with the same number of wheel attachment holes, same styling, different
PCD and/or different inset/outset values can be grouped at the same or at a lower value of test
bending moment taking into account the test schedule to follow. Wheels with the largest centre
hole diameter shall be included in the test.
In the case of a negative test, due to material failures, it can be compensated by two positive tests
of the same wheel version. If either or both of the final two samples fail, then the application for
approval of the replacement wheel shall be rejected.
Necessary tests:
Number of wheels to be tested
Minimum PCD
Maximum PCD
if only one PCD
Inset variations up to 2 mm
Rotating bending test
Short test
Long test
1
1
2

1
1
2

From 2 mm to 5 mm
> 5 mm
1
1

1
If the resulting test bending moment
increases up to 10% max.
1 1

ANNEX 7
ROLLING TEST
1. TEST DESCRIPTION
In the rolling test the stress on the wheel when driving straight ahead is simulated by testing a
wheel rolling against a drum which has a minimum outside diameter of 1.7 m, in the case of an
external rolling test, or a minimum internal diameter equal to the dynamic radius of the tyre divided
by 0.4 in the case of an internal rolling test. Two wheels shall be tested.
In the case of a negative test, due to material failures, it can be compensated by two positive tests
of the same wheel version. If either or both of the final two samples fail, then the application for
approval of the replacement wheel shall be rejected.
2. FORMULA FOR CALCULATION OF THE TEST LOAD
All types of vehicles
F = S × F
F = testing load [N]
F = wheel maximum load capacity of the wheel [N]
S = factor of safety
3. TESTS PROCEDURE AND REQUIREMENTS
Tests are carried out on the basis of the following specifications:
M , M G, N and N G
O and O
Rolling direction
Straight
Factor of safety − S
2.5
2.0
2.25
Tyres
Taken from normal (series) production and, if possible, of the
maximum nominal section width recommended for the wheel
Testing speed in km/h
The max. allowed by the tyre given by the speed index, usually
60-100 km/h
Equivalent rolling distance
Tyre pressure at start of test
(nor checked or controlled
during the test)
Limits of acceptance
Allowable loss of tightening
torque initially applied to the
wheel fixing studs and nuts
2.000 km
1.000 km
Normal usage:
Up to 160 kPa
More than 160 kPa
2.000 km
1.000 km
rolling test pressure
280 kPa
min. 400 kPa
Technical cracks and/or air leakage are not accepted.
≤ 30%

ANNEX 8
IMPACT TEST
1. TEST DESCRIPTION
The fracture behaviour of the wheel striking an object at the outer rim flange shall be checked at
critical positions. For proof of adequate fracture behaviour, an impact test according to
ISO 7141:2005 shall be carried out.
In the case of a negative test, due to material failures, it can be compensated by two positive tests
of the same wheel version. If either or both of the final two samples fail, then the application for
approval of the replacement wheel shall be rejected.
2. FORMULA FOR THE CALCULATION OF TEST LOAD
D = 0.6 × F / g + 180 [kg]
D = value of falling mass [kg]
F = maximum wheel load capacity [N]
g = acceleration due to gravity 9.81 m/s
3. TEST PROCEDURE AND REQUIREMENTS
M , N , M G and N G
Procedure and requirements ISO 7141:2005
Tyre pressure
Tyres
Acceptance criteria
Number of samples to be
tested
Impact positions
The tyre pressure recommended by the tyre manufacturer based
on the load index and the max. vehicle speed, but at least
200 kPa.
Tyres taken from normal (series) production with the minimum
nominal section width and minimum rolling circumference on the
range of tyres recommended for the particular wheel.
The test shall be considered satisfactory if there is not any
visible fracture penetrating through the wheel surface and if
there is not any loss of inflation pressure within one minute of
completing the test. Fractures and indentations caused by the
direct contact with the falling weight are acceptable.
In the case of wheels with demountable rims or other
components that can be dismantled, if threaded fastenings that
are close to the spoke or ventilation holes fail the wheel is to be
considered as having failed the test.
One for each impact position.
One in the area connecting spokes to rim and further one in the
area between two spokes, very close to the valve hole.
If possible, the impact direction shall not coincide with the radial
line between a fixing hole and the wheel centre.

ANNEX 9
RESERVED
ANNEX 10
VEHICLE FITMENT CHECKS AND DOCUMENTATION
1. APPLICATION AND FITTING INFORMATION
The type approval authority shall be supplied with a copy of following information which shall also
be supplied to the consumer with the wheel.
1.1. Wheel Characteristics:
ECE approval number, wheel type and variant, international rim designation (for example,
15 H2 x 5½ J) and inset/outset.
1.2. Vehicle Characteristics:
Those vehicle characteristics should be listed that distinctly describe the vehicle type and version
for which the wheel will be used. Thereby, depending on the restriction of the range of application
of various markets with respect to certain vehicle versions and variants, various specification
characteristics are possible.
Absolutely required are the data of:
(a)
(b)
Vehicle manufacturer;
Vehicle type;
Additional optional data, e.g.:
(c)
(d)
Vehicle approval number; (if applicable variant/version)
Engine performance (also possible range of performance).
Other specification characteristics/restrictions may also be used.
1.3. Additional characteristics: Any particular requirements, special fittings and so on that are specified
when using the manufacturer’s replacement wheels or specific requirements for the ECE approved
wheel.
1.4. Fitting Instruction Detail:
Recommendations and safety precautions when fitting the wheel;
Use of any additional or substitute wheel fixing components, for example, longer wheel bolts or
studs with alloy wheels;
Wheel fixing tightening torque; drawing attention to the importance of this aspect and the need to
preferably use a calibrated torque wrench; Instruction regarding the necessity to re-tighten the
wheel fixing after 50 km of driving; References to the use and mounting of hubcaps, if applicable;

2. ADDITIONAL REQUIREMENTS
Wheel calliper check
The design of the inner contour of the wheel (wheel calliper see Figure 1) must provide sufficient
space for the brake, suspension and steering components.
In the case where the wheel calliper is outside of the vehicle manufacturer’s replacement wheel
calliper, no verification is necessary.
In the case where the calliper is inside the vehicle manufacturer’s replacement wheel calliper, a
check shall be carried out of wheel operating clearance with respect to brake, suspension and
steering components and general under body components, taking into account the effect of wheel
balance weights.
As a rule, the following criteria have to be fulfilled:
minimum clearance for brake components (worst case, for example with new brake linings):
3 mm ),
minimum clearance for suspension components (e. g. upper and lower suspension arms): 4 mm,
minimum clearance for steering components (e.g. track rod and steering joints): 4 mm, and
minimum clearance between balance weights and vehicle components: 2 mm.
The check may be carried out statically or dynamically. If the various clearances on the vehicle
manufacturer’s replacement wheel are less than those given above, then these can be accepted.
2.2. Ventilation Holes Check
An approved wheel shall not reduce the brake efficiency in comparison with a manufacturer’s
replacement wheel. The heat transfer from the brakes into steel wheels is regarded as being more
severe than that with of light alloy wheels. In the case where the vehicle manufacturer’s
replacement wheel is designed for a defined air circulation from the brake through the wheel
ventilation holes (for example by "windmilling" effect) and where the area of the ventilation holes,
in a pattern part replacement wheel, is smaller than the corresponding vehicle manufacturer’s
replacement wheel, a comparison test shall be carried out to evaluate the brake efficiency.
The test shall follow the requirements of Regulation No. 13, Appendix 4, Paragraph 1.5. Type I -
Fade test procedure. The criterion is the brake temperature. The maximum temperature
measured (discs, drum) using the vehicle manufacturer’s replacement wheel must not be
exceeded with the wheel to be approved.
Any hubcaps normally fitted are to be taken into account.

Wheels - Passenger Cars.