ISO/FDIS 13988

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 13988
ISO/TC 22/SC 33
Passenger car and light truck vehicle
Secretariat: DIN
wheels — Clip and adhesive balance
Voting begins on:
2021­05­24 weight and rim flange nomenclature,
test procedures and performance
Voting terminates on:
2021­07­19
requirements
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 13988:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2021
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ISO/FDIS 13988:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

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

Introduction ..................................................................................................................................................................................................................................v

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

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

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

4 Rim flange types .................................................................................................................................................................................................... 6

5 Test procedure for clip on balance weight ................................................................................................................................. 6

5.1 Preparation of clip on balance weight for test ............................................................................................................. 6

5.1.1 Selection of balance weights .................................................................................................................................. 6

5.1.2 Measurement of key dimensions of balance weights ....................................................................... 6

5.1.3 Marking of balance weights .................................................................................................................................... 6

5.2 Preparation of the wheel for clip on balance weight testing ........................................................................... 7

5.2.1 Cleaning ................................................................................................................................................................................... 7

5.2.2 Marking .................................................................................................................................................................................... 7

5.2.3 Measurement of rim flange dimensions ...................................................................................................... 7

5.3 Installation of clip on balance weight.................................................................................................................................. 7

5.4 Tangential test for clip on balance weight ....................................................................................................................... 8

5.4.1 General...................................................................................................................................................................................... 8

5.4.2 Test equipment .................................................................................................................................................................. 8

5.4.3 Test sequence .................. .................................................... ................................................................................................ 8

5.4.4 Performance requirements tangential force............................................................................................ 9

5.5 Axial removal test for clip on balance weight ............................................................................................................... 9

5.5.1 Test equipment .................................................................................................................................................................. 9

5.5.2 Test sequence .................. .................................................... ................................................................................................ 9

5.5.3 Performance requirement axial force .........................................................................................................10

6 Test procedure for adhesive balance weights for all size weights and wheels .................................11

6.1 Test equipment ....................................................................................................................................................................................11

6.2 Wheel preparation ............................................................................................................................................................................12

6.3 Balance weight selection and installation ....................................................................................................................12

7 Shear adhesion test.........................................................................................................................................................................................13

7.1 Test procedure ......................................................................................................................................................................................13

7.2 Performance ...........................................................................................................................................................................................13

8 Pull-off adhesion test ....................................................................................................................................................................................13

8.1 Test procedure ......................................................................................................................................................................................13

8.2 Performance ...........................................................................................................................................................................................14

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This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 33,

This second edition cancels and replaces the first edition (ISO 13988:2008), which has been technically

— nomenclature for the balance weight and test procedures and performance requirements for the

Any feedback or questions on this document should be directed to the user’s national standards body. A

This document addresses clip and adhesive balance weights used on passenger car wheels. It provides

general features and configurations of the clip balance weights, general features of the adhesive balance

weights, and general features and configurations for rim dimensions relevant to clip on weights and

This document provides test procedures to evaluate weight retention on the wheel.

This document specifies procedures and minimum performance requirements for testing without

tyres the retention of balance weights for use on wheels for passenger vehicles. It also specifies general

features for configurations of clip balance weights, rim flanges for light alloy and steel wheels intended

for use on passenger cars and adhesive balance weights. Alternative materials and geometries can be

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

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

ISO 3911, Wheels and rims for pneumatic tyres — Vocabulary, designation and marking

ISO 4223­1, Definitions of some terms used in the tyre industry — Part 1: Pneumatic tyres

For the purposes of this document, the terms and definitions given in ISO 3911, ISO 4000-1, ISO 4000-2,

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

assembly of the weight (3.1.1) and the clip (3.1.3), which is intended for mounting on the rim flange (3.3)

to balance the tyre/wheel assembly about its axis of rotation and thus minimize vibrations due to the

Note 1 to entry: Figure 1 gives the terminology and nomenclature of balance weight assembly.

material of a specified mass with contours to conform to the surface of the rim flange (3.3)

specially formed metal affixed to the weight (3.1.1) to mount the balance weight on the rim flange (3.3)

optional part of a clip (3.1.3) that protrudes from its surface interfacing with the rim flange (3.3)

dimensions that are essential for fitting the balance weight (3.1.1) on the rim flange (3.3)

static force required to remove the balance weight (3.1.1) from the rim flange (3.3)

ability of the balance weight (3.1.1) to maintain its secure position on the rim flange (3.3) in various

measure of balance weight (3.1.1) press fit computed as the difference between the flange thickness and

assembly of the weight portion (3.2.1) and the adhesive portion, which is intended for mounting on the