ISO INTERNATIONAL STANDARD 4209-1 Sixth edition 2001-09-01 Truck and bus tyres and rims (metric series) - Part 1: Tyres Pneumatiques et jantes (séries millimetriques) pour camions et autobus - Partie 1:Pneumatiques Reference number ISO 4209-1:2001(E) (So @ ISO 2001 ISO 4209-1:2001(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. @ ISO 2001 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic in the country of the requester. ISO copyright office Case postale 56. CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyright@iso.ch Web www.iso.ch Printed in Switzerland @ ISO 2001 - All rights reserved ISO 4209-1:2001(E) Contents Page Foreword... 1 Scope 2 Normative reference.. 3 Termsand definitions 4 Tyre designation .... 4.1 Content. 4.2 Size and construction 4.2.1 Marking ...... 4.2.2 Nominal section width. 4.2.3 Nominal aspect ratio . 4.2.4 Tyreconstruction code 4.2.5 Nominal rim diameter .... 4.3 Service condition characteristics . 4.3.1 Marking.. 4.3.2 Load index. 4.3.3 Speed symbol... 4.4 Other service characteristics . 4.5 Example... 5 Tyre dimensions .. 5.1 Calculation of "design" tyre dimensions .... 5.1.1 Coefficients ... 5.1.2 Theoretical rim width, Rth 5.1.3 Measuring rim width, Rm 5.1.4 Design tyre section width, S 5.1.5 Design tyre section height, H.. 5.1.6 Design tyre overall diameter, Do 5.1.7 Values .... 5.2 Calculation of "maximum overall tyre dimensions in service' 5.2.1 Maximum overall width in service, Wmax .... 5.2.2 Maximum overall diameter in service, Do,max 5.3 Minimum dual spacing (MDS).. 5.4 Approved rim widths .... 6 Tyre dimension tables... 7 Method of measurement of tyre dimensions . 8 Service characteristics... 8.1 Tyre load-carrying capacity... 8 8.2 Speed symbo..... 8.3 Load-carrying capacity at various speeds.. Annex A (informative) Guideline values for metric series, 5° rims ... 12 Annex B (informative) Guideline values for metric series, 15° rims.. 15 Annex C (informative) Tyre dimension tables... .19 ion?served ili