ISO/TR 16377:2012

Further clarification of ISO 28580

ISO/TR 16377:2012 seeks to document elements of clarification to ISO 28580:2009 where consensus exists. Other suggestions for clarification will demand further work and consensus building and are not included in ISO/TR 16377:2012. Although it is expected that these clarifications will be adopted in future revisions to ISO 28580, they are intended only as guidance for the user.

Précisions concernant l'ISO 28580

General Information

• Status: Published
• Publication Date: 08-Jul-2012
• ICS: 83.160.01 - Tyres in general
• Technical Committee: ISO/TC 31 - Tyres, rims and valves
• Drafting Committee: ISO/TC 31 - Tyres, rims and valves
• Current Stage: 6060 - International Standard published
• Due Date: 09-Jan-2015
• Completion Date: 09-Jul-2012

Standards Content (Sample)

TECHNICAL ISO/TR
REPORT 16377
First edition
2012-07-15
Further clarification of ISO 28580
Précisions concernant l’ISO 28580
Reference number
ISO/TR 16377:2012(E)
©
ISO 2012

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ISO/TR 16377:2012(E)
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ii © ISO 2012 – All rights reserved

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ISO/TR 16377:2012(E)
Contents Page
Foreword .iv
Introduction . v
1 Scope . 1
2 General . 1
3 Clause 3, Terms and definitions . 1
3.1 Additional definition: candidate machine . 1
3.2 Definition 3.13: deviation of alignment tyre . 1
4 Clause 6, Test conditions . 1
4.1 Subclause 6.2, Table 1, and subclause 6.4, Table 2 . 1
4.2 Subclause 6.4, Table 2 . 1
5 Clause 7, Test procedure . 2
5.1 Subclause 7.4, Table 3 . 2
5.2 Subclause 7.6.2, Note 1 . 2
5.3 Subclause 7.6.3, list item a) . 2
6 Subclause 8.1, Determination of parasitic loss . 2
7 Subclause 10.2, Conditions for reference machine, and subclause 10.3, Conditions for
candidate machine . 3
© ISO 2012 – All rights reserved iii

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ISO/TR 16377:2012(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
In exceptional circumstances, when a technical committee has collected data of a different kind from that
which is normally published as an International Standard (“state of the art”, for example), it may decide by a
simple majority vote of its participating members to publish a Technical Report. A Technical Report is entirely
informative in nature and does not have to be reviewed until the data it provides are considered to be no longer
valid or useful.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/TR 16377 was prepared by Technical Committee ISO/TC 31, Tyres, rims and valves.
iv © ISO 2012 – All rights reserved

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ISO/TR 16377:2012(E)
Introduction
ISO 28580, Passenger car, truck and bus tyres — Methods of measuring rolling resistance — Single point
test and correlation of measurement results, was published in 2009. During the approval process, several
suggestions were made for clarification which were supported by ISO/TC 31/WG 6 and are included in this
Technical Report.
© ISO 2012 – All rights reserved v

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TECHNICAL REPORT ISO/TR 16377:2012(E)
Further clarification of ISO 28580
1 Scope
This Technical Report seeks to document elements of clarification to ISO 28580:2009 where consensus exists.
Other suggestions for clarification will demand further work and consensus building and are not included in
this Technical Report. Although it is expected that these clarifications will be adopted in future revisions to
ISO 28580, they are intended only as guidance for the user.
2 General
The meaning of terms “larger truck and bus tyres” and “smaller truck and bus tyres” is not clear. It is proposed
that the terms “larger” and “smaller”, as used in these phrases, be removed, and that th
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