هيئة التقييس لدول مجلس التعاون لدول الخليج العربية  
GCC STANDARDIZATION ORGANIZATION (GSO)  
 
 
مشروع مواصفة نهائي 
Final Draft of  Standard FDS  
  
 
 
 
إعداد اللجنةالفنية الفرعية  الخليجية رقم TC 02/SC 01 
 
Prepared by GSO Technical Sub -Committee No. TC 02/SC 01  
 
  
 
GSO 02  /01/FDS/  1052  :2018  
 
 
 
 
إطارات السيارات  
الاستخدام المؤقت للعجلات الاحتياطية/ الإطارات وطرق اختبارها  
 
Motor Vehicles Tyres: Temporary Use Spare Wheels/Tyres and 
Their Methods of Test  
 
 
 
   ICS:  83.160.10; 83.160.01    
هذه الوثيقة مشروعلمواصفة قياسية  خليجية تم توزيعها 
لإبداء الرأي والملحوظات بشأنها ، لذلك فإنها عرضة 
للتغيير والتبديل ، ولا يجوز الرجوع إليها كمواصفة 
قياسية  خليجية إلا بعد اعتمادها من الهيئة. This document is  a draft Gulf Standard  
circulated for comments. It is, therefore, 
subject to alteration and modification 
and may not be referred to as a Gulf 
Standard  until approved by GSO.  GSO 1052 :2018                                                                   GSO STANDARD  
 
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هيئةةة التقيةةي  لةةدو  مجلةة  التعةةاو   لةةدو  الخلةةي  العربيةةة هيئةةة إقليميةةة تضةةم فةة  عضةةويتها أجهةة   التقيةةي  
الوطنيةةة فةةة  الةةدو  الأعضةةةاء، ومةةن مهةةةا  الهيئةةةة إعةةةداد المواصةةفات القياسةةةية واللةةوا ا الفنيةةةة الخليجيةةةة 
بواسطة لجا  فنية متخصصة . 
قةةةةر  المجلةةةة  الفنةةةة  لهيئةةةةة التقيةةةةي  لةةةةدو  مجلةةةة  التعةةةةاو  لةةةةدو  الخلةةةةي  العربيةةةةة فةةةة  اجتماعةةةة   قةةةةةةم ( ) 
الةةةةةةةةةذي عقةةةةةةةةةد بتةةةةةةةةةا ي ......./......./....... هةةةةةةةةةة ، الموافةةةةةةةةة/ ......./...../.......   اعتمةةةةةةةةةاد تحةةةةةةةةةةدي  
اللا حةةةةةةة الفنيةةةةةةة الخليجيةةةةةةة  قةةةةةةم 2018 1052 SO G   "إطةةةةةةا ات ال ةةةةةةيا ات  الاسةةةةةةتخدا  الم قةةةةةة  
للعجةةةةةةةلات الا/تياطيةةةةةةةة/ الإطةةةةةةةا ات وطةةةةةةةر  اختبا هةةةةةةةا "   التةةةةةةة  تةةةةةةةم د اسةةةةةةةتها و إعةةةةةةةدادها ضةةةةةةةمن برنةةةةةةةام  
عمةةةةةةل اللجنةةةةةةة الفنيةةةةةةة الفرعيةةةةةةة الخليجيةةةةةةة  قةةةةةةم TC 02/SC01 " اللجنةةةةةةة الفنيةةةةةةة الفرعيةةةةةةة الخليجيةةةةةةة
لمواصفات المركبات والإطا ات " المد جة ف  خطة دولة الكوي  . 
على أ  تلغ  اللا حة الفنية الخليجية الخليجية  قم GSO 1052 :2000  و تحل محلها 
 
    
  GSO 1052 :2018                                                                   GSO STANDARD  
 
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Motor Vehicles Tyres: Temporary Use Spare Wheels/Tyres and Their 
Methods of Test  
 
 
1- SCOPE AND FIELD OF APPLICATION  
 This standard is concerned with the temporary -use spare wheels and tyres 
for passenger cars and multipurpose vehicles.  
 
2- COMPLEMENTARY REFERENCES  
 
2.1       GSO 48 “Motor Vehicles - Conformity Certificates”.  
 
2.2             GSO 51 “Passenger Car Tyres - Part 1: Nomenclature, Designation,  
            Marking, Dimensions, Load Capacity and Inflation Pressure”.  
 
2.3       GSO 52 “Passenger Car Tyres - Part 2: General Requirements”.  
 
2.4       GSO 53 “Passenger Car Tyres - Part 3:  Methods of Test”.  
 
2.5       GSO 645  "Multi -purpose Vehicles, Trucks, Buses and Trailers Tyres – Part:  
          1: Nomenclature, Designation, Marking, Dimensions, Load Capacity and    
                  Inflation Pressure ”. 
 
2.6       GSO 646 "Multi -purpose Vehicles, Trucks, Buses and Trailers Tyres – Part  
      2: Method of Test”.  
 
2.7       GSO 647 “Multi -purpose Vehicles, Trucks, Buses and Trailers Tyres, Part   
      3: General Requirements".   
 
3- NOMENCLATURES AND DEFINITIONS  
 
3.1  Wheel: A complete wheel consisting of a rim and a wheel disc.  
 
3.1.1  "Wheel  size designation ". It means a designation comprising at least the 
nominal rim diameter, the nominal rim width and the rim profile . 
 
3.1.2  "Wheel offset " means the distance from the hu b abutment face to the 
centre l ine of the rim . 
 
3.2  Temporary -use spare wheel: A wheel different from one of the standard 
wheels on the vehicle type.  
 
3.3  Temporary -use spare tyre: It is a  tyre that specifically designed to be different 
from a normal tyre and  intended only for temporary use under restrict ed 
driving conditions . 
 
3.4  Unit: An assembly of a wheel and tyre.  GSO 1052 :2018                                                                   GSO STANDARD  
 
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3.5  Standard unit: A unit which is capable of being fitted to the vehicle for 
normal operation.  
 
3.6  Spare unit: A unit which is intended to be exchanged for a standard unit in 
case of malfunction of the latter.  A “spare unit” may be either of the 
following:  
 
3.4  Standard spare unit: It is an assembly of a wheel and tyre identical in terms 
of wheel and  tyre size designations, wheel offset and tyre structure to that 
fitted in the same axle position and to the particular model or version of the 
vehicle for normal operation. It includes the case of a wheel that is produced 
from a different material, for ex ample, steel instead of aluminium alloy, that 
may use different wheel fixing nut or bolt designs but which is otherwise 
identical to the wheel intended for normal operation.  
 
3.5  Temporary -use spare unit: It is an assembly of any wheel and tyre that is not 
within that defined as a "Standard spare unit" in paragraph  3.4. Temporary -
use spare units may be of the following types:  
 
3.5.1  Type 1   
It is an assembly in which the tyre is a temporary -use spare tyre as defined in 
paragraph 3.3.  
 
3.5.2  Type 2   
It is an assembly in which the wheel has a different offset from that of the 
wheel fitted in the same axle position for normal operation of the vehicle.  
 
3.5.3  Type 3   
It is an assembly in which the tyre is of a different structure from that fitted in 
the same axle position for normal operation of the vehicle.  
 
3.5.4  Type 4   
It is an assembly in which the tyre is a normal tyre as defined in paragraph  3.5 
of GSO51/2017  but where the size designation of the wheel or the tyre or 
both, differ from those of the wheel or tyre fitted in the same axle position for 
normal operation of the vehicle.  
 
3.5.5  Type 5   
It is a n assembly in which a wheel and tyre  unit as defined in p aragraph  3.54 
or 3.56 of GSO51/2017  is fitted to the vehicle for normal, long -term  road use, 
but used in an emergency in a totally deflated condition.  
 
3.6  "Maximum mass ". It is  the maximum value of the vehicle stated by the 
manufacturer to be technically permissible (this mass may be higher than 
the "permissible maximum mass" laid down by the national administration).  
 
3.7  “Max imum axle load” . It is the maximum value, as indicated by the 
manufacturer, of the total vertical force between the contact surfaces of GSO 1052 :2018                                                                   GSO STANDARD  
 
 5 
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  deleted paragraphs  the tyres or tracks of one axle and the ground and resulting from the part of 
the vehicle mass supported by that axle; this load may be higher than the 
"authorized axle load" laid down by the national administration. The sum of 
the axle loads may be greater than the value corresponding to the total 
mass of the vehicle.  
 
3.8  “Functional dimensions” dimensions derived from the size designation of  the 
wheel and/or tyre (e.g. diameter, width, aspect ratio) and from the 
mounting of the unit to the vehicle (e.g. wheel offset).  
 
3.9 "Run-Flat Warning System " describes a system which delivers information to 
the driver that a tyre is operating in the fla t tyre running mode .  
 
4- DESIGNATION  
 The designation shall be as specified in the standard mentioned in item 2. 2. 
   
5- REQUIREMENTS  
  
5.1  Tyres intended for the use as part of temporary -use spare units as defined in 
paragraph 3. 5 shall meet the requirements of the  GSO  standard mentioned 
in item 2.3  or 2.7 .  
 
5.2  For vehicles having at least four wheels, the load capacity of the temporary -
use spare unit shall be at least equal to one half of the highest of the 
maximum (gross) axle load of the vehicle.  
 
5.3  The design speed of the temporary -use spare unit shall be  at least 120 km/h , 
for types 1, 2 and 3 .  
 
5.4  If the vehicle is equipped with a temporary -use spare unit stored in a 
deflated condition, a device must be provided on the vehicle which permits 
the tyre to be inflated to the pressure specified for temporary -use within a 
maximum of 10  minutes.   
 
5.5  Under normal service conditions the braking performance shall be obtained 
without any wheel locking, deviation of the vehicle from its intended course, 
abnormal vibration, abnormal wear of the tyre durin g the test or excessive 
steering correction.  
 
6- MARKING  
 
6.1  The temporary -use spare unit shall exhibit  the following characteristics :  
 
6.1.1  A maximum speed warning symbols shall be permanently displayed as 
follows :  
 
6.1.1.1  a) A 80  km/h maximum speed warning symbol arranged in accordance with 
the diagram below shall be permanently displayed on the outer face of the 
wheel in a prominent position  (see Figure 1) :  GSO 1052 :2018                                                                   GSO STANDARD  
 
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                            Figure 1 : 80 km/h Speed Warning Symbol  (Option 1)  
 
 
b) Alternatively a single warning symbol arranged in accordance with the 
diagram below, shall be permanently displayed on the outer face of the 
wheel in a prominent position  (see Figure 2) . 
 
 
 
 
                         Figure 2 : 80 km/h Speed Warning Symbol  (Option 2)  
 
c) Upper case letters shall be at least 5  mm high and the numbers "80" and 
"50" shall be  at least 20  mm high with the elements that make up each 
character of the number at least  3 mm line thickness. Lower case text sh all 
at least have a line h eight  of 5 mm. All text shall be enclosed in a border and 
be on a background of contrasting color.  
 
d) The requirements of this paragraph shall apply to types 1, 2 and 3 
temporary -use spare unit as defined in paragraphs  3.5.1, 3.5.2 and 3.5.3.     
 
6.1.1.2  a) A 120  km/h maximum speed warning symbol arranged in accordance 
with the diagram below shall be permanently displayed on the outer face 
of the wheel in a prominent position.  
 
GSO 1052 :2018                                                                   GSO STANDARD  
 
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                      Figure 3 : 120 km/h Speed Warning Symbol  (Option 1)  
 
 
b) Alternatively a single warning symbol arranged in accordance with the 
diagram below, shall be permanently displayed on the outer face of the 
wheel in a prominent position.  
 
 
 
                           Figure 4 : 120 km/h Speed Warning Symbol  (Option 2)  
 
 
c) Upper case letters shall be at least 5  mm high and the numbers "120" and  
"75" shall be at least  20 mm high with  the elements that make up each  
character of the number at least  3 mm line t hickness. Lower case text shall  
at least have a line height of 5 mm. All text sh all be enclosed in a border and  
be on a background of contrasting color.  
 
d) the requirements of this paragraph shall only apply to a type 4 temporary  
use spare unit as defined in paragraph 3.5.4 , to be supplied for use on an M1  
and N1 category vehicle.  
 
6.1.2          Sticker  with the f ollowing statements in Arabic: “CAUTION! TEMPORARY USE  
                  ONLY” MAX. 80 km/h.  “REPLACE BY STANDARD UNIT”.  
 
6.1.3  When mounted to the vehicle for temporary -use the outward facing surface 
of the wheel and/or tyre shall exhibit a distinctive color or color pattern 
which is quite clearly different from the color(s) of the standard units. If it is 
GSO 1052 :2018                                                                   GSO STANDARD  
 
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  deleted paragraphs  possible to attach a whe el cover to the temporary -use s pare unit, the 
distinctive colo r or color pattern shall not be obscured by this wheel cover.   
 
6.2  If the vehicle is e quipped with a temporary  use spare unit, the o wner's 
manual of the vehicle shall contain at least the following information:  
 
6.2.1  An instruction to drive with caution and at no more than the permitted 
maximum speed of 80  km/h when a type 1, 2 or 3 temporary -use spare unit 
is fitted, and to reinsta ll a standard unit as soon as possible. It shall be made 
clear that this instruction also applies to a type  5 temporary -use spare unit 
being used in the flat tyre running mode .  
 
6.2.2   An instruction to drive with caution and at no more than the permitted  
maximum speed of 120  km/h, when a type  4 spare unit is fitted, and to 
reinstall a standard unit as soon as possible.  
 
6.2.3  A statement that operation of the vehicle is not permitted with more than 
one temporary -use spare unit fitted at the same time. This requirement shall 
only apply to a type 1, 2  and 3 temporary -use spare units.  
 
6.2.4  A clear indication of the inflation pressure specified by the vehicle 
manufacturer for the tyre of the temporary -use spare unit.  
 
6.2.5   For vehicles equipped with a temporary -use spare unit stored in a deflated 
condition, a description of the procedure for inflating the tyre to the pressure 
specified for temporary -use by means of the device referred to in 
paragraph  5.4. above.   
 
6.2.6  A statement of the risk resulting from non -compliance with the restrictions on 
the use of a temporary -use spare unit including, as appropriate, a statement 
relating to use restricted to a specific axle .  
 
7-               DIMENSIONS, LOAD CAPACITY AND INFLATION PRESSURE   
Dimensions, load capacity and inflation pressure shall be in accordance 
with the contained in publications  current at the date of manufacture of 
the tyre or any later date, of at least one of the following organizations:  
7.1             “ISO Standards”.  
 
7.2             “The Tyre and Rim Association Inc” T.R.A. in (U.S.A.).  
  
7.3              “The European Tyre and Rim Technical Organizations” (ETRTO).  
 
7.4              “Japan Automobile Tyre Manufacturers’ Association Inc.” (JATMA).  
 
7.5              “Deutsche Institut for Normung” (DIN).  
 
7.6              “British Standards Institution” (BSI).  GSO 1052 :2018                                                                   GSO STANDARD  
 
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  deleted paragraphs  7.7              “Scandinavian Tyre and Rim Organization” (STRO).  
 
7.8  “The Tyre and Rim Association of Australia”.  
 
7.9  “Association Francaise  de Normalisation” (AFNOR)  
 
8-         TESTING  
 
8.1         Sampling  
 
8.1.1         All tyres and/or wheels in the consignment shall be visually inspected.  
 
8.1.2           For the other tests the consignment shall be divided into groups with the  
       same type (designation and use).  A sample of two tyres and/or wheels  
       shall be chosen at random from each group for tests.  
 
8.2              Methods of test  
The following tests shall be carried out on the tyres taken in accordance    
with item 8.1: 
 
8.2.1  All tests mentioned in GSO Standard 53/ 2017  “Passenger Car Tyres - Part 3: 
Methods of Test” , and GSO 646/2017 “ Multi -purpose Vehicles, Trucks, Buses 
and Trailers Tyres – Part 2: Method of Test”.  
 
8.2.2  Braking and Deviations Test  
 
8.2.2.1        Preparation for test  
a) The test track shall be substantially level and have a surface affording 
good adhesion.  
 
b) The test shall be performed when there is no wind liable to affect the 
results.   
 
c) The vehicle shall be loaded to its maximum mass as defined in 
paragraph  3.6. The axle loads resulting from the loading condition 
shall be proportional to the maximum axle loads as defined in 
paragraph  3.6. 
 
d) Except in the case of a run -flat tyre, the tyres shall be inflated to the 
pressures recommended by the vehicle manufacturer for the vehicle 
type and loading condition. A run -flat tyre shall be tested in the fully 
deflated condition . 
 
e) All vehicle openings (doors, windows, bonnet, boot, convertible top, 
etc.), shall be closed except as required for instrumentation purposes.  
 
f) The force applied to a brake control shall be equal or less than 500 N.  
 GSO 1052 :2018                                                                   GSO STANDARD  
 
 10 
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  deleted paragraphs  g) Road test shall be conducted on more than 3.7 m wide, level clean 
and dry roadway.  
  
h) The ambient temperature s hall be between 0oC and 38oC, and the 
maximum wind velocity shall be 5 m/s.  
 
i) The vehicle shall be aligned in the centre of the roadway at the start 
of each brake application.  
 
j) The test shall be carried out with the temporary -use spare unit fitted 
alternately in place of one front wheel and one rear wheel. However, 
if use of the temporary -use spare unit is restricted to a specific axle, 
the test shall be carried out only with the temporary -use spare unit 
fitted to that axle.  
 
k) The test shall be carri ed out using the service braking system from an 
initial speed of 80 km/h with the engine disconnected.  
 
8.2.2.2   Test procedure   
The performance of the vehicle shall be determined by measuring the  
stopping distance in relation to the prescribed speed of the vehicle  
and/or by measuring the mean fully developed deceleration during the 
test.  The stopping distance shall not exceed the value  listed in Table 1.  
 
                                            TABLE 1  
           Breaking Performance Reference Test  Values  
 
Vehicles 
category  Temporary -use 
spare unit type*  Prescribed 
speed, 
km/h  Applied 
force to the 
foot control, 
N Stopping 
distance, 
m Mean fully 
developed 
deceleration 
(dm)**, ms-2 
M1 Types 1, 2, 3 and 5  80 500 50.7 5.8 
N1 Types 1, 2, 3 and 5  80 700 61.2 5 
M1 Type 4  120 500 108 5.8 
N1 Type 4  120 700 128.8  5 
M1 or N1  Types 1, 2, 3 and 5  80 500 (+0/ -50) 46.4 6.43 
M1 Type 4  120 500 (+0/ -50) 98.4 6.43 
 
* See paragraphs 3.5.1 -3.5.5  
**
)s-(s 25.92v-v=d
b e2
e2
b
m  
 
where:  
vo = initial vehicle speed at beginning of braking in km/h,  
vb = vehicle speed at 0.8 v o in km/h,  
ve = vehicle speed at 0.1 v o in km/h,  
sb = distance travelled between v o and v b in metres,  
se  = distance travelled between v o and v e in metres.  GSO 1052 :2018                                                                   GSO STANDARD  
 
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- The stopping distance shall not exceed the value resulting from the 
following formula:       
 
S ≤ 0.1 V  +  V2/150   
 
Where:  
S   = stopping distance in m.  
 
V   = initial speed km/h.  
- Stopping distances reported are to be corrected for initial speed using 
the following formula, providing that the actual initial speed deviated 
from the desired initial speed by no more than 3.2 km/h.    
 
 Sc  =  Sm  x  Vd2/Va2    
 
Where:  
Vd   = desired  initial speed km/h.  
Va   = actual initial speed km/h.  
Sm  = measured stopping distance m.  
Sc   = corrected stopping distance m.  
 
A vehicle shall be deemed to comply with the stopping distance 
requirement if one of four stops does not exceed the maximum  allowable 
stopping distance calculated and also with item 5.5.  
 
 9-  CRITERIA OF TECHNICAL CONFORMITY  
 
9.1  Tyres and/or wheels accompanied with the vehicles the criteria of technical 
conformity shall be in accordance with GS O 48 “Motor Vehicles - Conformity 
Certificates”.  
 
9.2.1  Two months at least before dispatching the consignment of any type of 
compact spare tyres and/or wheels, the manufacturer shall send to GSMO 
in English and/or Arabic languages, certifying that this type of tyres and/or 
wheels meets the requirements of GS standards for tyres.  The certificate shall  
be in accordance with the standard mentioned in item 2.2, and shall include  
the following:    
 
9.2             Tyres and/or wheels coming separately as replacement parts  
9.2.1.1       Type including designation, recommended maximum speed load range   
                  and service description.  
 
9.2.1.2        Manufacturer’s name.  
9.2.1.3        Country of origin . GSO 1052 :2018                                                                   GSO STANDARD  
 
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REFERENCES : 
 
1. ECE No. 64 “A temporary use spare unit, run flat tyres and/or a run flat -system, 
and/or a tyre pressure monitoring system”, Revision 3; 9th November 2010.   
 
2. ECE No. 64 “A temporary use spare unit, run flat tyres and/or a run flat -system, 
and/or a tyre pressure monitoring system”, Revision 1/Amendment 1; 23th May 
2012.  
 
3. ECE No. 64 “A temporary use spare unit, run flat tyres and/or a run flat -system, 
and/or a  tyre pressure monitoring system”, Revision 1/Amendment 2; 14th 
February 2013.  
 
4. ECE No. 64 “A temporary use spare unit, run flat tyres and/or a run flat -system, 
and/or a tyre pressure monitoring system”, Revision 1/Amendment 3; 22th 
February 2017.