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GB/T 6326-2005 PDF in English

GB/T 6326-2005 (GB/T6326-2005, GBT 6326-2005, GBT6326-2005)
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GB/T 6326-2005: PDF in English (GBT 6326-2005)

GB/T 6326-2005 (replaced by GB/T 6326-2014, from Sep 2015)
National Standard
of the People’s Republic of China
ICS 83.160.10
Replacing GB/T 6326-1994
Tyre Terms and Definitions
(ISO 4223-1. 2002, Definitions of some terms used in tyre industry –
Part 1. Pneumatic tyres, NEQ)
(Replaced by GB/T 6326-2014, from Sep 2015)
Jointly Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
Table of Contents
1 Scope ... 4 
2 Normative References ... 4 
3 General Terms ... 4 
4 Category of tyre ... 5 
5 Components of Tyre ... 10 
6 Tread Pattern ... 13 
7 Rim ... 15 
8 Tyre Dimension ... 15 
9 Tyre Performance and the Test ... 18 
10 Tyre Marking ... 30 
11 Appearance Defects of Tyres ... 32 
12 Tyre Service ... 36 
13 Tyres Retread and Repair ... 40 
Annex A (Informative) Nominal Rim Diameter... 43 
Annex B (Informative) Corresponding Relation between Speed Symbols and Speeds .. 44 
Annex C (Informative) Corresponding Relation between Load Indices and Loads ... 45 
Chinese Index ... 47 
English Index ... 58 
This Standard is not equivalent to ISO 4223-1.2002 "Definitions of Some Terms Used in the
Tyre Industry - Part 1. Pneumatic Tyres" (English version).
This Standard replaces GB/T 6326-1994 "Tyre Terms".
Compared with GB/T 6326-1994, the major technical differences in this Standard are as
— Standard name is modified;
— The order of the clauses number is adjusted;
— Technological term (3.7, 1994 edition) is deleted;
— The dimension and parameters terms at tyre loads are included into the tyre
performance and the test (3.6of 1994 edition; Chapter 9 of this edition);
— Tyre marking terms are added (Chapter 10 of this edition);
— Many terms for the performance of the test of the tyre are increased or deleted and
some other terms are modified (3.11 of 1994 edition; Chapter 9 of this edition).
Annex A, Annex B and Annex C of this Standard are informative.
This Standard was proposed by the China Petroleum and Chemical Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee 19 on Tyres
and Rims of Standardization Administration of China.
The National Technical Committee 19 on Tyres and Rims of Standardization Administration
of China is entrusted for the interpretation of this Standard.
Drafting organizations of this Standard. Beijing Research & Design Institute of Rubber
Industry, Shuguang Rubber Industry Research & Design Institute, Hualin Tyre Co., Ltd.,
Yantai C.S.I. Rubber Co., Ltd., and Xiamen Zhengxin Rubber Industry Co., Ltd.
Chief drafting staffs of this Standard. Xia Songmao, Wu Jiangtao, Sheng Baoxin, Wang
Yanlin, Liu Yangguang, and Huang Huiwen.
Historical editions replaced by this Standard are as follows.
— GB 6326-1986, and GB/T 6326-1994.
Tyre Terms and Definitions
1 Scope
This Standard specifies the terms and definitions for general use, category of tyres,
components of tyres, tread pattern, rims, dimension of tyres, performance and test of tyre, tyre
marking, appearance defects, application, retread and repair.
This Standard is applicable to passenger car tyre, light truck tyre, truck tyre, earth-mover tyre,
agricultural tyre, industrial tyre, motorcycle tyre, cycle tyre and aircraft tire.
2 Normative References
The following standards contain provisions which, through reference in this Standard,
constitute provisions of this Standard. For dated references, subsequent amendments
(excluding corrections) or revisions of these publications do not apply. However, all parties
coming to an agreement according to this Standard are encouraged to study whether the latest
edition of the normative document applies. For undated references, the latest edition of the
normative document applies.
GB/T 12549 "Automotive Controllability and Stability - Terms and Definitions"
3 General Terms
A ring-shaped covering that fits around a wheel's rim for driving the automobiles,
engineering machinery, agricultural machinery, industrial vehicle, motorcycle and cycle
vehicle and helping the aircrafts take off /land.
New tyre
Tyre that has been neither used nor subjected to a retreading operation.
Grown tyre
Tyre that has undergone expansion due to use in service.
Pneumatic tyre
Tyre that needs the compressed gas or liquid in the chamber and is capable of keeping
the pressure, including tube-tyre and tubeless tyre.
Solid tyre
Tyre that has the materials of different performances filled in the carcass and is not
equipped with inner cavity.
Pneumatic tyre that needs the inner tube within the inner cavity of tyre cover, typically
including cover, inner tube and flap.
Tubeless tyre
Pneumatic tyre that is not assembled with the inner tube.
Enclosure body of tyre capable of bearing various acting forces.
Inner tube
Ring-shaped elastic tube that is used to keep the inner pressure and accompanied with
inflating valve.
Endless belt that protect the inner tube rim part against the wear by the rim.
4 Category of tyre
4.1 Based on use
Normal tyre
Tyre for normal use.
Special tyre
Tyre intended for special use.
e.g. mixed use, both on or off road or for other strict speed limit.
Mud and snow tyre
Tyre whose tread pattern and tread structure are primarily designed to achieve in
non-freezing or melting snow or muddy conditions a performance better than that of a normal
Temporary-use spare tyre
Tyre that has the support in the inner cavity of cover.
Removable tread tyre
Pneumatic tyre with replaceable tread.
Pressed-on solid tyre
Solid tyre that is pressed and fixed on the rim by the interference fit and accompanied
with the steel ring.
Cured-on solid tyre
Solid tyre directly vulcanized on the rim and not equipped with the steel ring.
Solid tyre for pneumatic tyre rim
Solid tyre fabricated on the pneumatic tyres rims.
Cylindrical base solid tyre
Solid tyre with cylindrical base and fastened on the rim.
Conical base solid tyre
Solid tyre with conical base and fastened on the divided rim.
Anti-static solid tyre
Conductive solid tyre, capable of preventing the accumulation of static charge.
Conductive solid tyre
Conductive solid tyre having resistance ≤250,000 Ω.
Oil-resistance solid tyre
Solid tyre resistant to the oil corrosion.
High-load solid tyre
Elastomeric solid tyre having the load capacity higher than the solid rubber tyre of the
same specification.
Solid elastomer tyred wheel assembles for track laying vehicles
Support wheel of track laying vehicles with the rubber layer hung the web.
Nose aircraft tyre
Tyre used on nose gear of aircraft.
Main aircraft tyre
Tyre used on main gear of aircraft.
9.3 Strength
Breaking energy
Energy required for the pressure head breaking through the crown.
Burst pressure
Pressure of tyre in case of bursting under the hydraulic action.
Safety factor of strength
Ratio of burst pressure measured in the hydraulic pressure test to the inflation pressure
corresponding to tyre load capacity.
9.4 Bead unseating resistance
Bead unseating
Separation of tubeless tyre bead from the rim bead seat.
Bead unseating resistance
Force required for separating the tubeless tyre bead from the rim bead seat.
Air permeability of inner liner and inner tube of cover.
9.5 Endurance
Endurance test(drum method)
Test carried out on the drum tester to assess tyre resistance to fatigue and effect of heat at
the test condition as required.
Mileage test
The test in which the tyre is mounted on the user's vehicle and used in the actual use, for
assessing the service life-b...
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.