ISO/DIS 3911

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
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ISO/DIS 3911:2020(E)
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ISO/DIS 3911:2020(E)
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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

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

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.

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

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

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

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

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

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

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

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

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

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

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,

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

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