ISO INTERNATIONAL STANDARD 10454 First edition 1993-06-01 Truck and bus tyres Verifying tyre capabilities - Laboratory test methods Pneumatiques pour camions et autobus -- Vérification de I'aptitude des pneumatiques - Méthodes d'essai en laboratoire Reference number ISO10454:1993(E) IS010454:1993(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (isO member bodies). The work of preparingInternationalStandardsis normallycarriedout throughISo technical committees. Each member body interested in a subject for 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. 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 ISO/TC 31, Tyres, rims and valves, Sub-Committee SC 4, Truck and bus tyres and rims. Annexes A and B of this International Standard are for information only. ISO1993 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without per mission in writing from the publisher. International Organization for Standardization Case Postale 56 . CH-1211 Geneve 20 · Switzerland Printed in Switzerland ii INTERNATIONAL STANDARD ISO 10454:1993(E) Truck and bus tyres Verifying tyre capabilities Laboratory test methods 1 Scope 2 Normative reference This International Standard specifies test methods for The following standard contains provisions which, verifying the capabilities of truck and bus tyres. Of the through reference in this text, constitute provisions test methods presented, only some may be required of thisInternational Standard.At the timeof publi- depending on the type of tyre to be tested. cation, the edition indicated was valid. All standards aresubject torevision,andpartiestoagreements based on this International Standard are encouraged to investigate the possibility of applying the most re- The tests are carried out in a laboratory under controlled conditions. centeditionofthestandardindicatedbelow.Mem- bers of IEC and ISO maintain registers of currently valid International Standards. It includes a strength test for assessing the capability ISO 4223-1:1989, Definitions of some terms used in of the tyre structure, with respect to braking energy the tyre industry Part 1: Pneumatic tyres. in the tread area. A second test, the endurance test, assesses the re- Definitions sistance of the tyre with respect to service at full load and moderate speed over long distances. For the purposes of this International Standard, the definitions given in ISO 4223-1 and the following definitions apply. Thetest methodspresented inthisInternational Standard are not intended for gradation of tyre per- formance or quality levels. 3.1 bead separation: Breakdown of bond between components in the bead area This International Standard applies to all truck and bus 3.2 belt separation: Parting of rubber compound tyres. between belt layers or between belts and plies. 1