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/  647:2017  
 
 
 
 
إطارات المركبات التجارية الجزء الثالث: المتطلبات العامة  
Tyres for Commercial Vehicles  
Part 3: General Requirements  
 
 
 
 
   ICS:  43.020  
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 647:2017            GSO STANDARD 
 
 
 2 
 new paragraphs  
  modified paragraphs  
  deleted paragraphs  تقديم 
 
هيئةةة التقيةةي  لةةدو  مجلةة  التعةةاو   لةةدو  الخلةةي  العربيةةة هيئةةة إقليميةةة تضةةم فةة  عضةةويتها أجهةة   التقيةةي  
الوطنيةةة فةة  الةةدو  الأعضةةاء ، ومةةن مهةةا  الهيئةةة إعةةداد المواصةةفات القياسةةية واللةةوا ا الفنيةةة الخليجيةةة 
بواسطة لجا  فنية متخصصة . 
قةةةةر  المجلةةةة  الفنةةةة  لهيئةةةةة التقيةةةةي  لةةةةدو  مجلةةةة  التعةةةةاو  لةةةةدو  الخلةةةةي  العربيةةةةة فةةةة  اجتماعةةةة   قةةةةةةم ( ) 
الةةةةةةةةةةذي عقةةةةةةةةةةد بتةةةةةةةةةةا ي ......./......./....... هةةةةةةةةةةة ،الموافةةةةةةةةةة. ......./...../.......    اعتمةةةةةةةةةةاد تحةةةةةةةةةةدي  
المواصةةةفة القياسةةةية الخليجيةةةة  قةةةم  GSO 647:2017  "إطةةةا ات المركبةةةات التجا يةةةة  الجةةة ء الثالةةة   
المتطلبةةةةات العامةةةةة " التةةةة  تةةةةم د اسةةةةتها و إعةةةةدادها ضةةةةمن برنةةةةام  عمةةةةل اللجنةةةةة الفنيةةةةة الفرعيةةةةة الخليجيةةةةة 
 قةةةةةم TC 02/SC01   " اللجنةةةةةة الفنيةةةةةة الفرعيةةةةةة الخليجيةةةةةة لمواصةةةةةفات المركبةةةةةات والإطةةةةةا ات " 
المد جة ف  خطة دولة الكويت . 
على أ  تلغ  المواصفة القياسية الخليجية  قم GSO 647:1996  و تحل محلها 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 GSO 647:2017            GSO STANDARD 
 
 
 3 
 new paragraphs  
  modified paragraphs  
  deleted paragraphs  Tyres for Commercial Vehicles  
Part 3: General Requirements  
 
 
1- SCOPE AND FIELD OF APPLICATION  
 
 This standard is concerned with new tyres for commercial vehicles ( Light 
Trucks, Heavy Trucks, Buses and trailers). This standard is not applicable for 
tyre types identified by speed category less than 80  km/h. It is also not 
applicable to motor cycle, road equipment or agricultural equipment tyres.  
 
2-        COMPLEMENTARY REFERENCES  
2.1 GSO 645/2017 " Tyres for Commercial Vehicles  – Part 1: Nomenclature, 
Designation, Marking, Dimensions, Load Capacity and Inflation Pressure ".  
2.2 GSO 646/2017 " Tyres for Commercial Vehicles  – Part 2: Method of Test”  
3- DEFINITIONS  
 
 Refer to the definitions stated in the Gulf standard mentioned in 2.1 
4- REQUIREMENTS  
 
The following shall be met in the tyres of multi -purpose vehicles, trucks, buses 
and trailers.  
4.1 Appearance  
4.1.1  The tyre shall exhibit no visual evidence of tread, sidewall, ply, cord, inner -
liner, or bead separation, chunking, broken cords, cracking or open splices.  
4.1.2  The tread shall be even and no exposed tyre ply cord shall be visible.  
4.2 Strength  
       When tyres tested in accordance with test procedure listed in GSO 646/2017 
Standard, t he average breaking energy of tyres shall not be less than the 
values specified  in Table  1 for that tyre’s size and load range.  
4.3 Endurance  
 When tyres tested in accordance with test procedure listed in GSO 646/2017 
Standard :  
 
4.3.1  There shall be n o evidence of tread, side wall, ply, cord, inner liner, or bead 
separation, tread chunking, broken cord, cracking or open splices when the 
tyre subjected to the endurance test.  
4.3.2  The outer diameter of the tyre, measured six hours after the endurance test, 
shall not differ by more tha n 3.5 % from the outer diameter as measured 
before the test.  GSO 647:2017            GSO STANDARD 
 
 
 4 
 new paragraphs  
  modified paragraphs  
  deleted paragraphs  4.3.3  The tyre pressure at the end of the test shall be not less than the initial 
pressure specified.  
4.4 Treadwear I ndicators  
4.4.1  Each tyre shall have at least six traverse rows of treadwear indicators, equally 
spaced around the circumference of the tyre that enable a person 
inspecting the tyre to determine visually whether the tyre has worn to tread 
depth of and situated in the prin cipal grooves of the tread  depth of 1.6 mm.  
4.4.2 Tyres designed for mounting on rims of nominal rim diameter code 12 or less, 
shall have at least three such  treadwear indicator s. 
4.5 Speed Symbol  
4.5.1  The speed symbol shall be marked on the tyre, and it  shall be as indicated 
in GSO standard mentioned in item 2.1.  
4.5.2  The tyres fitted on MPV shall be with speed symbol ‘S’ or higher.  
4.5.3  The tyres fitted on City buses shall be with speed symbol ‘J’ or higher  
4.5.4  The tyres fitted on other buses shall be with speed symbol ‘M’ or higher  
4.5.5   The tyres fitted on Light Truck, marked with prefix ‘LT ’or suffix ‘C’, shall be with 
speed symbol ‘L’ or higher  
4.5.6  The tyres fitted on the heavy truck shall be with speed symbol ‘ K’ or higher  
4.5.7   The tyres  of the category ‘special use  ’(see paragraph 3.6.3 of GSO 645 ) 
fitted on Light and heavy Trucks shall be with speed symbol G or higher  
4.5.8  The speed symbol marked on the professional off -road tyre (POR) shall be 
not less than ‘ L’ and not greater than ‘Q’ for C2 tyres.  
 
4.5.9 The speed symbol marked on the professional off -road tyre (POR) shall be 
not less than ‘G’ and not greater than ‘K’ for C3 tyres.  
  
5-         MARKING  
 
 The marking of tyres shall be in accordance with the GSO standard 
mentioned in  item 2.1  
6- TESTING  
6.1 Sampling  
Two tyres with identical characteristics, e.g. size designation and service 
description or maximum load rating and speed capability, shall comprise a 
test sample.  GSO 647:2017            GSO STANDARD 
 
 
 5 
 new paragraphs  
  modified paragraphs  
  deleted paragraphs  a) One tyre shall be used for the measurement of strength.  
b) A second tyre shall be used for the endurance test.  
 
 Each test sample shall conform to the requirements specified in 6.3.1 and 
6.3.2.  
6.2 Methods of Test 
 The tests shall be carried out in accordance with GSO Standard mentioned 
in item 2.2.  
6.3      Tests 
 The fo llowing tests shall be carried out on samples taken in accordance with 
item 6. 1.  
6.3.1 Visual inspection  
 
6.3.2         Dimensions  
 
6.3.3  Strength  
 
6.3.4     Endurance  
 
6.3.5  High speed performance  
 
7-            CRITERIA OF TECHNICAL CONFORMITY  
7.1 Two months at least before dispatching the consignment of any type of 
tyres, the manufacturer shall send to the Standardization Organization for 
GCC (GSO) a conformity certificate – in his formal paper – in English and/or 
Arabic languages, c ertifying that this type of tyres meets the requirements of 
GSO technical regulation for tyres.  The certificate shall include the following 
(Appendix "A" shows an example of this certificate):  
7.1.1  Designation of dimensions, construction, nominal tyre ri m diameter and 
speed symbol  
7.1.2    Trade name, trade mark, brand name or manufacturer’s name.  
7.1.3  Country of production  
7.1.4  Regroovable (if designed)  
7.1.5  Tube type or tubeless   
7.1.6  The production period which shall not be more than one full year.  
7.1.7  A guarantee valid for at least one year.  
7.2        The results of tests carried out shall be supplied to GSO.  
 GSO 647:2017            GSO STANDARD 
 
 
 6 
 new paragraphs  
  modified paragraphs  
  deleted paragraphs  7.3 The period from the date of manufacture till the date of sale shall not exceed 
24 months for tyres of buses and light trucks, and 30 months for heavy duty 
truck tyres. The dealer or distributor shall give the purchaser a guarantee 
certificate valid for one year at least as from the date of sale and the 
guarantee shall be applicabl e to tyres equipped on new cars . 
7.4 The approved conform ity certificate shall be valid only for one year from the 
date of approval.  
7.5 In case of Standardization Organization for GCC (GSO) acceptance of the 
certificate mentioned in item 7.1, the type of tyres shall be considered 
acceptable.  
7.6 In case the certificate is  not accepted (because information is incomplete 
or subject to question), the information may be completed.  If not 
completed or if necessary, substantiated tests, as required by the standard 
shall be carried out on tyre samples.  
 
 
TABLE 1  
Minimum Static Breaking Energy (J)  
 
Tyre characteristic  All tyres of 
rim 
diamtere 
code ≤ 12  Light truck 
(“LT” or 
“C”) and 
rim 
diamter 
code ≤ 
17.5 Tyres other than : Light truck, rim diamtere code ≤ 
12 
Tube 
type  Tubeless > 
17.5 rim 
diameter 
code  Tube 
type  Tubeless > 
17.5 rim 
diameter 
code  
Plunger diameter 
(mm)  19.05 mm  19.05 mm  31.75 
mm 31.75  
mm 38.1  
mm 38.1 
 mm 
Breaking Energy  J J J J J J 
Load Range        
A 67 225 …….  …….  …….  …….  
B 135 293 …….  …….  …….  …….  
C 203 361 768 576 …….  …….  
D 271 514 892 734 …….  …….  
E 338 576 1412  971 …….  …….  
F 406 644 1785  1412  …….  …….  
G …….  711 …….  …….  2282  1694  
H …….  768 …….  …….  2598  2090  
J …….  …….  …….  …….  2824  2203  
L …….  …….  …….  …….  3050  …….  
M …….  …….  …….  …….  3220  …….  
N …….  …….  …….  …….  3389  …….  
 
 
 
 
 
 
 
 GSO 647:2017            GSO STANDARD 
 
 
 7 
 new paragraphs  
  modified paragraphs  
  deleted paragraphs  RFERENCES : 
 
1. ECE No. 54 “Uniform provisions concerning the approval of pneumatic tyres for   
            commercial vehicles and their trailers, Revision 3; 26th March 2013 .  
 
2.       ECE No. 54 “Uniform provisions concerning the approval of pneumatic tyres for   
      commercial vehicles and their trailers, Revision 3/ Amendment 1: 3rd February   
  2015 .  
 
3. ECE No. 54 “Uniform provisions concerning the approval of pneumatic tyres for  
commercial vehicles and their trailers, Revision 3/ Amendment 2; 5th February 
2016 .  
 
4. ECE No. 54 “Uniform provisions concerning the approval of pneumatic tyres for  
commercial vehicles and their trailers, Revision 3/ Amendment 3; 26th March 
2013 . 
  
5. ECE No.  54 “Uniform provisions concerning the approval of pneumatic tyres for  
commercial vehicles and their trailers, Revision 3/ Corrigendum 1; 18th December 
2014 .  
 
6. ECE No. 54 “Uniform provisions concerning the approval of pneumatic tyres for  
commercial vehicles and their trailers, Revision 3/ Corrigendum 2; 25th August 
2014 .  
 
7.      FMVSS No. 119 “New pneumatic tires for motor ve hicles with a GVWR of more    
           than 4,536 kilograms (10,000 pounds) and motorcycle”; 2008  
 
8.      GS 645 “ Multi-Purpose Vehicles , Trucks, Buses and Trailers Tyres  Part 1 ”; 2005  & 2009  
 
9.      GS 646 “ Multi -Purpose Vehicles , Trucks, Buses and Trailers Ty res Part 2 ”; 1996  & 2009  
 
10.      GS 647 “ Multi -Purpose Vehicles , Trucks, Buses and Trailers Ty res Part 3 ”; 1996  & 2009