ISO 4000-1:2013 pdf download.Passenger car tyres and rims一Part 1:Tyres (metric series).
This part of Iso 4000 specifies the designation, dimensions and load ratings of metric-series tyres primarily intended for passenger cars.
2 Normative references
The following referenced documents are indispensable for the application 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 3877-1, Tyres, valves and tubes — List of equivalent terms — Part 1: Tyres
ISO 4223-1, Definitions of some terms used in the tyre industry — Part 1: Pneumatic tyres
ISO 16992, Passenger car tyres — Spare unit substitutive equipment (SUSE)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in Iso 4223-1 and ISO 387711) and the following apply.
3.1
rim protector
feature incorporated into the lower sidewall area of the tyre, which is intended to protect the rim flange from damage
EXAMPLE A protruding circumferential rubber rib.
4 Designation
4.1 Size and construction
4.1.1 Characteristics
The tyre characteristics shall be designated as follows:
Nominal section width / Nominal aspect ratio Tyre construction code Nominal rim diameter code
4.1.2 Nominal section width
The nominal section width of the tyre shall be indicated in millimetres, and this part of the designation shall end in either the numeral of zero or five, so that in any single series of tyres with the same nominal aspect ratio, the values shall all end in 0 or they shall all end in 5.
For sizes mounted on 50 tapered (code-designated) rims, the nominal section width designation shall end in 5.
4.1.3 Nominal aspect ratio
The nominal aspect ratio (HIS) shall be expressed as a percentage and shall be a multiple ot 5.
4.1.4 Tyre construction code
The tyre construction code shall be as follows:
— B for bias-belted construction;
— D for diagonal construction;
— R for radial-ply construction.
In the case of tyres designed for vehicles having a maximum speed capability exceeding 240 km/h, the code-letters ZR may be indicated with the dimensional and constructional characteristics for radial-ply tyres instead of the tyre construction code R (see 4.2).
The code-letters ZR shall be used in the dimensional and constructional characteristics associated with the speed symbol Y and the load index, both placed within parentheses, to identify performance up to 300 km/h for tyres suitable for speeds exceeding 300 km/h.
EXAMPLE 235/45 ZR 17 (97Y).
For maximum speed capability and load capacity of the tyre over 300 km/h, consult the manufacturer.
Use of any other code-letter (for example in the case of a new construction type) should first be submitted to ISO for acceptance.
4.1.5 Nominal rim diameter code
For tyres mounted on 5° tapered (code-designated) rims, the code shall be as given in Table 1.ISO 4000-1 pdf download.