ISO/DIS 3911

Wheels and rims for pneumatic tyres -- Vocabulary, designation and marking

Roues et jantes pour pneumatiques -- Vocabulaire, désignation et marquage

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 3911
ISO/TC 22/SC 33 Secretariat: DIN
Voting begins on: Voting terminates on:
2020-09-08 2020-12-01
Wheels and rims for pneumatic tyres — Vocabulary,
designation and marking
Roues et jantes pour pneumatiques — Vocabulaire, désignation et marquage
ICS: 01.040.43; 43.040.50
THIS DOCUMENT IS A DRAFT CIRCULATED
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ISO/DIS 3911:2020(E)
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ISO/DIS 3911:2020(E)
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ISO/DIS 3911:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

Annex A (normative) Wheel/rim size designation .............................................................................................................................18

Annex B (normative) Marking ..................................................................................................................................................................................20

© ISO 2020 – All rights reserved iii
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ISO/DIS 3911:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2. www .iso .org/ directives

Attention is drawn to the possibility that some of the elements of this document may be the subject of

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any patent rights identified during the development of the document will be in the Introduction and/or

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Any trade name used in this document is information given for the convenience of users and does not

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For an explanation on the meaning of ISO specific terms and expressions related to conformity

assessment, as well as information about ISO's adherence to the WTO principles in the Technical

Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information

The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 33, Vehicle

dynamics and chassis components, Working Group 5. Wheels.
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DRAFT INTERNATIONAL STANDARD ISO/DIS 3911:2020(E)
Wheels and rims for pneumatic tyres — Vocabulary,
designation and marking
1 Scope

This International Standard presents a vocabulary of terms related to, and systems for the designation

and marking of, wheels and rims intended for use with pneumatic tyres. The intention is to define

fundamental wheel and rim terms rather than provide a comprehensive tabulation of all wheel design

features. Also specified are the content, location and minimum size of the wheel and rim marking, with

the purpose of establishing, on a worldwide basis, a uniform identification system for wheels and rims.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

ISO 4000-2, Passenger car tyres and rims — Part 2: Rims
ISO 4209-2, Truck and bus tyres and rims (metric series) — Part 2: Rims

ISO 4251-3, Tyres (ply rating marked series) and rims for agricultural tractors and machines — Part 3: Rims

3 Terms and definitions
3.1
wheel

rotating load-carrying member between the tyre and the axle, usually consisting of two major parts,

the rim and the wheel disc, which may be integral, permanently attached or detachable

[SOURCE: See Figures 1 to 8.]
3.1.1
rim
that part of the wheel on which the tyre is mounted and supported
3.1.2
disc
wheel disc

that part of the wheel which is the supporting member between the axle and the rim

3.1.3
single wheel
wheel which supports one tyre on one end of an axle
3.1.4
dual wheel

wheel with sufficient inset and configuration so that two such wheels, when assembled with each other,

support two tyres on one end of an axle
[SOURCE: See Figure 2.]
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ISO/DIS 3911:2020(E)
3.1.5
inset wheel

wheel so constructed that the rim centreplane is located inboard of the attachment face of the disc

[SOURCE: See Figure 1 a).]

Note 1 to entry: Inset is the distance from the attachment face of the disc to the rim centreplane.

3.1.6
zeroset wheel

wheel so constructed that the rim centreplane is coincident with the attachment face of the disc

[SOURCE: See Figure 1 b).]
3.1.7
outset wheel

wheel so constructed that the centreplane of the rim is located outboard of the attachment face of the disc

[SOURCE: See Figure 1 c).]

Note 1 to entry: Outset is the distance from the attachment face of the disc to the centreplane of the rim.

Note 2 to entry: Track, the distance between the centreplanes of the tyres on an axle, increases as the outset of

the wheels is increased.
3.1.8
dual spacing

distance between the centreplanes of the rims to provide the required clearance between the tyres

[SOURCE: See Figures 2, 5 and 6.]
3.2 Wheel types
3.2.1
disc wheel
permanent combination of a rim and wheel disc
[SOURCE: See Figures 1 and 2.]
3.2.2
divided wheel

wheel so constructed that its two main parts, the rim portions of which might or might not be the

same in width, when securely fastened together with clamping bolts or equivalent mechanical means,

combine to form a rim having two fixed flanges
[SOURCE: See Figure 3.]
3.3
wire wheel

wheel so constructed that its rim is joined to the centre member (shell) by a series of wire

spokes[SOURCE: See Figure 4.]
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ISO/DIS 3911:2020(E)
a) Inset wheel b) Zeroset wheel c) Outset wheel
Key
1 rim centreplane 7 attachment face diameter of wheel
2 disc 8 attachment face
3 nut seat 9 inset
4 bolt hole 10 rim
5 pitch circle diameter of bolt holes 11 zeroset
6 centre hole diameter 12 outset
Figure 1 — Passenger car and light commercial vehicle disc wheels — Nomenclature
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ISO/DIS 3911:2020(E)
a) Single application b) Dual application
Key
1 rim centreplane 8 centre hole diameter
2 disc 9 attachment face
3 inset 10 attachment face diameter of wheel
4 external face of disc 11 rim
5 nut seat 12 dual spacing
6 bolt hole 13 offset
7 pitch circle diameter of bolt holes
Figure 2 — Commercial vehicle disc wheels — Nomenclature
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ISO/DIS 3911:2020(E)
Key
1 rim centreplane
2 fixed flanges
3 clamping bolts or equivalent mechanical means
4 outset
5 attachment face
Figure 3 — Divided wheel — Nomenclature
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ISO/DIS 3911:2020(E)
a) Conventional mounting type b) Centre mounting type
Key
1 rim centreplane 5 inset
2 rim 6 cone seat for retaining nut
3 wire spokes 7 spline
4 centre member (shell) 8 hub seat reference plane
Figure 4 — Wire wheels — Nomenclature
3.4 Wheels with demountable rims
3.4.1
wheel with 28° mounting bevel

wheel so constructed that one or two demountable rims are clamped to the cast wheel body, which also

serves
...