اﻟﻌﺮﺑﻴﺔ  اﻟﺨﻠﻴﺞ  ﻟﺪول اﻟﺘﻌﺎون  ﻣﺠﻠﺲ  ﻟﺪول اﻟﺘﻘﻴﻴﺲ  هﻴﺌﺔ  
GCC STANDARDIZATION ORGANIZATION (GSO) 
 
 
   
 ﻣﺸﺮوع:  أوﻟﻲ  
 
  
GSO 02/CD/647:2011 
 
  
  
واﻟﺸﺎﺣﻨﺎت  اﻷﻏﺮاض  ﻣﺘﻌﺪدة  اﻟﺴﻴﺎرات  إﻃﺎرات   
واﻟﻤﻘﻄﻮرات  واﻟﺤﺎﻓﻼت   
اﻟﺜﺎﻟﺚ اﻟﺠﺰء:  اﻟﻌﺎﻣﺔ اﻟﻤﺘﻄﻠﺒﺎت   
MULTI-PURPOSE VEHICLES, TRUCKS, 
BUSES AND TRAILERS TYRES 
PART 3: GENERAL REQUIREMENTS 
 
 
   
 
  
 
إﻋﺪاد 
 ﻟﻘﻄﺎع اﻟﺨﻠﻴﺠﻴﺔ  اﻟﻔﺮﻋﻴﺔ  اﻟﻔﻨﻴﺔ واﻹﻃﺎراتاﻟﻠﺠﻨﺔ  اﻟﻤﺮآﺒﺎت  ﻣﻮاﺻﻔﺎت  
 
  
              ﻓﺈﻧﻬ ﻟ ﺑﺸ  واﻟﻤﻼﺣﻈ  اﻟ ﻹﺑ ﺗﻮزﻳﻌﻬ  ﺗ ﺧﻠﻴﺠﻴ  ﻗﻴﺎﺳ  ﻟﻤﻮاﺻ  ﻣﺸ  اﻟﻮﺛﻴﻘ  هﺬﻩ
 واﻟﺘﺒ  ﻟﻠﺘﻐﻴﻴﺮ  ﻋﺮﺿﺔ             ﻣﺠﻠ  ﻣ اﻋﺘﻤﺎده  ﺑﻌ إﻻ ﺧﻠﻴﺠﻴ  ﻗﻴﺎﺳ  آﻤﻮاﺻ  إﻟﻴﻬ اﻟﺮﺟ  ﻳﺠ وﻻ
اﻟﻬﻴﺌﺔ إدارة  .   
 
ﺗﻘﺪﻳﻢ  
        اﻟﻮﻃﻨﻴ  اﻷﺟﻬ  ﻋﻀ  ﻓ ﺗﻀ إﻗﻠﻴﻤﻴ  هﻴﺌ اﻟﻌﺮﺑﻴﺔ  اﻟﺨﻠﻴﺞ  ﻟﺪول اﻟﺘﻌﺎون  ﻣﺠﻠﺲ  ﻟﺪول اﻟﺘﻘﻴﻴﺲ  هﻴﺌﺔ
 اﻟ إﻋ اﻟﻬﻴﺌ ﻣﻬ وﻣ ، اﻟﻌﺮﺑﻴ  اﻟﺨﻠ  دول ﻓ واﻟﻤﻘ  ﻟﻠﻤﻮاﺻ  اﻟﺨﻠﻴﺠﻴ  اﻟﻘﻴﺎﺳ  ﻤﻮاﺻ
 ﻣﺘﺨﺼﺼﺔ  ﻓﻨﻴﺔ ﻟﺠﺎن ﺑﻮاﺳﻄﺔ  .  
  
   رﻗ اﻟﻔﻨﻴ اﻟﻠﺠﻨﺔ ﻋﻤﻞ ﺑﺮﻧﺎﻣﺞ  ﺿﻤﻦ اﻟﻌﺮﺑﻴﺔ  اﻟﺨﻠﻴﺞ  ﻟﺪول اﻟﺘﻌﺎون  ﻣﺠﻠﺲ  ﻟﺪول اﻟﺘﻘﻴﻴﺲ  هﻴﺌﺔ ﻗﺎﻣﺖ ٢وﻗﺪ -
١ "   واﻹﻃ  اﻟﻤﺮآﺒﺎت  ﻣﻮاﺻﻔﺎت  ﻟﻘﻄﺎع اﻟﺨﻠﻴﺠﻴﺔ  اﻟﻔﻨﻴﺔ ﻟﻠﺠﻨﺔ     "   اﻟﺨﻠﻴﺠﻴ  اﻟﻘﻴﺎﺳ  اﻟﻤﻮاﺻ  ﺑﺘﺤ
 ٧٤٦رﻗﻢ/ ٦٩٩١   م،    " اﻟﺠ  واﻟﻤﻘﻄ  واﻟﺤ  واﻟﺸﺎﺣﻨﺎت  اﻷﻏﺮاض  ﻣﺘﻌﺪدة  اﻟﺴﻴﺎرات  إﻃﺎرات
اﻟﺜﺎﻟﺚ : اﻟﻌﺎﻣﺔ اﻟﻤﺘﻄﻠﺒﺎت" . اﻟﻤﻮاﺻﻔﺔ  هﺬﻩ ﻣﺸﺮوع  ﺑﺈﻋﺪاد  ﻋﻤﺎن ﺳﻠﻄﻨﺔ  وﻗﺎﻣﺖ  .   
  
 اﻟﻤﻮاﺻﻔﺔ  هﺬﻩ اﻋﺘﻤﺪت  آـوﻗﺪ  ) ﻗﻴﺎﺳﻴﺔ  ﻣﻮاﺻﻔﺔ/  ﻓﻨﻴﺔ ﻻﺋﺤﺔ(  ﺧﻠﻴﺠﻴﺔ     رﻗ اﻟﻬﻴﺌ إدارة ﻣﺠﻠ  اﺟﺘﻤﺎع  ﻓﻲ )          
        ( ﺑﺘ  ﻋﻘ اﻟﺬي ،      /      /       اﻟﻤﻮاﻓ  ، ه/    /      م     . رﻗ اﻟﻤﻮاﺻ  ﺗُﻠﻐِ أن ﻋﻠ)    /    (  
ﻣﺤﻠﻬﺎ وﺗَﺤﻞ  . 
Foreword 
 
GCC Standardization Organization (GSO ) is a regional Organization which 
consists of the National Standards Bodies of GCC member States. One of GSO 
main functions is to issue Gulf St andards /Technical regulations through 
specialized technical  committees (TCs). 
 GSO through the technical program of committee TC No  . 2-1 "The Gulf 
technical Subcommittee for vehicles a nd tyres standards" has updated the GSO 
Standard No. : 647/٦٩٩١multi-purpose vehicles, tr ucks, Buses and trailers 
tyres Part 3: general requirements". The Dr aft Standard has been prepared by 
Sultanate of Oman.   This standard has been approved as a Gu lf (Standard / Technical Regulation) by 
GSO Board of Directors in its meeting No.(       ),held on      /    /            H ,     /     
/              G. The approved standard will replace and supersede the GSO standard 
No. (       /      ).    
  
  GSO STANDARD GSO  /  
 
  1MULTI-PURPOSE VEHICLES, TRUCKS, 
BUSES AND TRAILERS TYRES 
PART 3: GENERAL REQUIREMENTS  
 
 
1. SCOPE AND FIELD OF APPLICATION 
 This standard is concerned with general requirements for new tyres for multi-
purpose vehicles, Light Trucks, Heavy Trucks, Buses and trailers. It is not applicable to motor cycle, road equipment or agricultural equipment tyres. 
 
2. COMPLEMENTARY REFERENCES 
2.1 GS 645/2009 "Multi-purpose Vehicles, Trucks, Buses and Trailers Tyres – Part 1 : 
Nomenclature, Designation, Marking, Dimensions, Load Capacity and Inflation 
Pressure ". 
2.2 GS 646/2009 "Multi-purpose Vehicles, Trucks, Buses and Trailers Tyres – 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 
 The breaking energy of tyres shall not be less than the values specified in    
Table1.when tested in accordance with the GSO Standard mentioned in item 2.2. 
4.3 Endurance GSO STANDARD GSO  /  
 
  24.3.1 No 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 than 3.5 percent from th e outer diameter as measured before the 
test. 
4.3.3 The tyre pressure at the end of the test shall be not less than the initial pressure 
specified. 
4.4 Treadwear indicators 
4.4.1 Each tyre shall have at least six traverse rows of treadwear indicators, equally 
spaced around the circumference of the tyre and situated in the principal grooves 
of the tread. 
4.4.2 Tyres designed for mounting on rims of nominal rim diameter code 12 or less, not 
less than four traverse rows of treadwear indicators is acceptable. 
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 buses shall be with speed symbol ‘M’ or higher 
4.5.4   The tyres fitted on Light Truck, marked with prefix ’LT‘ or suffix ’C‘, shall be 
with speed symbol ‘L’ or higher 
4.5.5 The tyres fitted on the heavy truck shall be with speed symbol ‘k’ or higher  
٤5.6   The tyres of the category ’special use ‘ (see GSO 645 3.2.3.3) fitted on Light and 
heavy Trucks shall be with speed symbol G or higher  
  
 
5. MARKING 
 The marking of tyres shall be in accordance with the GSO standard mentioned in 
item 2.1  
 6. TESTING 
6.1 Sampling GSO STANDARD GSO  /  
 
  3 Two tyres with identical characteristics, e.g. size designation and service 
description or maximum load rating and speed capability, shall comprise a test 
sample. 
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 re quirements 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 following 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. 
 
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, 
certifying 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 rim 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. GSO STANDARD GSO  /  
 
  47.1.7 A guarantee valid for at least one year. 
7.2        The results of tests carried out shall be supplied to GSO. 
 
7.3 The tyres shall be exported within twelve (12) months from the date of production 
indicated on the tyre. 
7.4 The approved conformity 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 sta ndard shall be carried out on tyre samples. 
 
 
 GSO STANDARD GSO  /  
 
  5 
Table (1) 
Minimum Static Breaking Energy 
 
 
 
Load 
range PR Breaking energy min.J 
Rim diameter 
code ≤ 12 Rim diameter 
code 13 and 14
Tube type 
marked "LT" Other tyres 
marked "LT" 
Tubeless with 
rim diameter 
code 13 to 17.5 
inclusive Other tyres 
Tube 
type Tubeless 
A 2 68 - 226 - - 
B 4 136 192 294 - - 
C 6 203 271 362 768 576 
D 8 271 384 514 893 734 
E 10 339 - 576 1 412 972 
F 12 407 - 644 1 785 1412 
G 14 - - 712 2 282 1 695 
H 16 - - 768 2 599 2 090 
J 18 - - - 2 825 2 203 
L 20 - - - 3 051 - 
M 22 - - - 3 220 - 
N 24 - - - 3 390 - 
Note: Rayon cord tyres to be 60% of the values shown. GSO STANDARD GSO  /  
 
  1 
APPENDIX  (A) 
 
MODEL OF A CERTIFICATE OF CONFORMITY 
FOR MULTI-PURPOSE VEHICLES, TRUCKS 
BUSES AND TRAILERS TYRES 
 
 
 
Name of Manufacturer:                                                          Ref .No : 
Country of Production:                                                                   Date      :  
 
To:  GCC Standardization Organization (GSO) 
 
We hereby certify that the tyres manufactured by as: 
 
Type.( Tyre Designation/Size)   
Tube/Tubeless :                          Bias/Radial :                      Speed symbol:     
Intended for use in: (multi-purpose vehicles/L ight Trucks/Heavy Trucks/Buses/trailers) 
Produced in the week  No …….Year…….. till the end of week No ……..of 
the year………….will satisfy the GSO Technical Regulation Nos. .................... 
The production period mentioned in the certificate shall not be more than one full year 
 
Note: All tyres are guaranteed for 12 months against manufacturing defects under normal 
operating conditions and with recommended inflation pressure. 
 
 
Stamp, name and signature of  
responsible person for the 
Concerned department of  
manufacturer