ISO 4209-1 pdf download – Truck and bus tyres and rims(metric series)一 Part 1: Tyres

ISO 4209-1 pdf download – Truck and bus tyres and rims(metric series)一 Part 1: Tyres.
It is applicable to bias-belied, diagonal and radial tyres for trucks and buses, mounted on 5° tapered rims and on 150 tapered (drop-centre) rims
It Is also applicable to d,Ilerent concepts and types of tyres and rims: In these cases, however, appropriate rwTllsection ratios K1, A4, coefficients K2, K3, CR and construction codes have been added to Tables 3, 4 and 5.
ISO 4209-2 deals with requirements for rims.
2 Normative reference
The following normative document contains provisions which, through reference In this text, constitute provisions of this part of ISO 4209. For dated references, subsequent amendments to, or revisions of, any of these pubicalions do not apply. However, parties to agreements based on this part of ISO 4209 are encouraged to investigate the possillty of applying the most ecent edition o4 the normative document ndicatod below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards,
ISO 4223-1 Delirrtons of some terms used in the tyre industry — ParT 1: Pneumatic tyros.
3 Terms and definitions
For the purposes of this part of ISO 4209. the terms and definitions given in ISO 4223-1 apply.
4 Tyre designation
4.1 Content
The designation of the tyre shall be shown on its sidewall and shall include the following markings, to be shown close to each other:
— size and construction (see 4.2);
— service condition characteristics (see 43).
The nominal section width shall be expressed in millimetres.
For tyres fined to 5° taper rims and for tyres fitted to 15° taper rims, the nominal tyre section widtti shall end in 5.
4.2.3 Nominal aspect ratio
The nominal aspect ratio shall be expressed as a percentage and shall be a muilipee of 5
4.2.4 Tyre construction code
The lyre construction code shall be as follows:
B for bias-belted construction:
D. or —, for diagonabias construction:
R for radial construction.
NOTE Other codes wdl be establd for new lyre concepts (consth,chons),
4.2.5 Nominal rim diameter
The nominal rim ckameter for 5° tapered bead seat rims and for 15° tapered bead seat (&op-oentre) rims shell be expressed by a code (see Table 1 for code correlation)
NOTE 15° tapered nins are to be used only for tyres with load Index 122 and larger
However, It shall be expressed in millimetres for new and future conCepts where the mounting of existing tyres on
new concept rims or of new concept tyres on existing rims epuld be incompatle.
4.3 ServIce condition characteristics
4.3.1 Marking
The characteristics shall be indicated as follows:
Load index single / Load index dual Speed symbol.