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GB/T 2933-2025 English PDF
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GB/T 2933: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 2933-2025 | English | 380 |
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Vocabulary, designation and marking of wheels and rims for pneumatic tyres
| Valid |
| GB/T 2933-2009 | English | 514 |
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Wheels and rims for pneumatic tyres -- Vocabulary, designation and marking
| Valid |
| GB/T 2933-1995 | English | 639 |
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Wheels/rims for pneumatic tyres--Nomenclature, designation and marking
| Obsolete |
| GB 2933-1982 | English | 599 |
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Wheels/Rims--Nomenclature terminology, symbol, marking and units for measurement
| Obsolete |
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GB/T 2933-2025: Vocabulary, designation and marking of wheels and rims for pneumatic tyres
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT2933-2025
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.50
CCS T 22
GB/T 2933-2025 / ISO 3911.2021
Replacing GB/T 2933-2009
Vocabulary, Designation and Marking of Wheels and Rims
for Pneumatic Tyres
(ISO 3911.2021, Wheels and Rims for Pneumatic Tyres - Vocabulary, Designation and
Marking, IDT)
Issued on: JUNE 30, 2025
Implemented on: JANUARY 1, 2026
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative References... 5
3 Terms and Definitions... 5
4 Designation of Wheels and Rims... 19
5 Marking Specifications... 21
Bibliography... 23
Vocabulary, Designation and Marking of Wheels and Rims
for Pneumatic Tyres
1 Scope
This document defines the relevant terminology of wheels and rims for pneumatic tyres and
specifies the designation and marking of wheels and rims for pneumatic tyres, including the
content, location and minimum dimension requirements.
This document applies to automotive wheels.
2 Normative References
This document does not have normative references.
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 wheel
A rotating member that bears loads between the tyre and the axle. It typically consists of two
main components. the rim and the spokes. The rim and the spokes may be integral, permanently
attached, or detachable.
NOTE. see Figure 1 ~ Figure 8.
3.2 Wheel Components
3.2.1 rim
The component on the wheel that mounts and supports the tyre.
3.2.2 disc; wheel disc
The supporting component on the wheel between the axle and the rim.
3.2.3 single wheel
A wheel that supports the tyre at one end of the axle.
3.2.4 inset wheel
A wheel with the center plane of the rim located inboard of the spoke mounting surface.
3.8.6 five- or more piece rim
A circlip composed of five or more components, when combined with other components,
constitutes a five-piece, six-piece, seven-piece or eight-piece rim.
4 Designation of Wheels and Rims
4.1 Designation
The designation of wheels and rims shall be expressed using numbers and letters in the
following order of priority.
a) Nominal diameter of rims.
---Existing rims are represented by the size designation1);
---For new rims used with new tyres, the nominal diameter is expressed in millimeters.
b) Rim construction type (optional).
---The symbol “” indicates one-piece rims;
---The symbol “” indicates multi-piece rims.
c) Nominal width of rims.
---Existing rim size designation1);
---For new rims used with new tyres, the nominal width is expressed in millimeters.
d) Rim profile.
One or more letters are used to represent the rim profile on the tyre mounting side.
EXAMPLE. B and J in ISO 4000-2, K in ISO 4209-2, and C, D, E and F in ISO 18804.
The profile marking is typically located after the nominal rim width, but it may also
be located before the nominal rim width or located on both sides of the nominal rim
width, as shown in the example of the marking on agricultural machinery rims in 4.2.
e) Flange height.
For rims intended for off-road vehicles, the one or several digits (in inches) following
the slash “/” in the size designation1) represent the flange height.
This mode of representation is permitted for multi-piece rims.
4.2 Rim Size / Profile Type
The following are examples of existing rim designation.
Passenger vehicles. 13 4.5B, 15 6J.
Light commercial vehicles. 15 5 1/2J, 15-5.5F SDC.
NOTE 1.SDC represents semi-deep groove rim.
Medium / heavy commercial vehicles. 20-7.5, 22-8.0, 22.5 8.25.
Agricultural machinery. 28 W12, 28 W10H, 26 DW16, 38 W18LA.
1) Size designation is based on the inch size.
NOTE 2.“DW” represents a rim with a secondary groove, “L” represents a low flange, and “A”
indicates a wide flange radius.
Off-road vehicles. 25-13.00/2.5.
NOTE 3.“/2.5” is the flange height designation.
5 Marking Specifications
5.1 Marking of Disc Wheels and Detachable Rims
The marking of disc wheels and detachable rims shall indicate the following information.
a) Rim designation;
b) Identification mark (name, symbol or trademark) of the wheel or rim manufacturer;
c) Date of manufacture;
d) Part number or code of the wheel or rim manufacturer.
5.2 Marking of Retaining Rings and Lock Rings
The retaining rings and lock rings2) shall indicate the following information.
a) Identification mark indicating the rim with which the component can be used;
b) Identification mark of the manufacturer;
c) Date of manufacture.
5.3 Divide Wheels
Both components of the divide wheels shall be marked in accordance with 5.1.
5.4 Height / Legibility
The marking shall be permanently indented or embossed and free of burrs. The typeface shall
be at least 3 mm in height and clearly legible.
5.5 Location / Visibility
The marking on wheels and detachable rims shall be visible after the tyre has been assembled
and inflated. For disc wheels, the marking may appear on the rim or spokes.
5.6 Additional Markings
2) The retaining ring and lock ring can be disassembled from the rim body. Since their design and
development vary from manufacturer to manufacturer, they should not be considered interchangeable.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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