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1、BRITISH STANDARD AUTOMOBILE SERIES BS AU 50-1.1b: 1996 ISO 4000-1: 1995 Tyres and wheels Part 1: Tyres Section 1: Car tyres Subsection 1.1b Specification for metric series tyres ICS 83.160.10 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:08:52 GMT+00:00 200
2、6, Uncontrolled Copy, (c) BSI BS AU 50-1.1b:1996 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 July 1996 BSI 11-1998 First published June 1995 Second edition July 1
3、996 The following BSI references relate to the work on this standard: Committee reference AUE/4 Draft for comment 94/709877 DC ISBN 0 580 25905 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee AUE/4, Tyres and wheels for
4、 motor vehicles, upon which the following bodies were represented: Agricultural Engineers Association Automobile Association British Industrial Truck Association British Pressure Gauge Manufacturers Association British Rubber Manufacturers Association Confederation of Passenger Transport UK Departme
5、nt of Transport Freight Transport Association Institute of Road Transport Engineers (Inc) Motor Cycle Industrys Association of Great Britain Ltd. Motor Industry Research Association National Tyre Distributors Association Retread Manufacturers Association Road Haulage Association Ltd. Society of Moto
6、r Manufacturers and Traders Ltd. Amendments issued since publication Amd. No.DateComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:08:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.1b:1996 BSI 11-1998i Contents Page Committees responsibleInsi
7、de front cover National forewordii 1Scope1 2Normative references1 3Definitions1 4Tyre designation1 5Marking4 6Tyre dimensions4 7Tyre dimension presentation6 8Tyre dimension measurement method7 9Inflation pressures7 10Load capacities7 Annex A (normative) Guideline values for tyres (metric series)8 An
8、nex B (normative) Load capacity indices for passenger car tyres14 Annex C (informative) Marking of radial tyres designed for vehicles with maximum speeds above 210 km/h19 Annex D (informative) Other existing size markings19 Table 1 Nominal rim diameter code1 Table 2 Correlation between load index (L
9、I) and tyre load-carrying capacity (TLCC)3 Table 3 Correlation between speed symbol and speed category4 Table 4 Coefficients for calculation of tyre dimensions6 Table 5 Approved rim widths for passenger car tyres as function of nominal aspect ratio6 Table 6 Example of tyre dimension table7 Table 7 R
10、ecommended pressures for measurement of tyre dimensions7 Table A.1 H/S of 95 to 75 inclusive (K1 = 0,7; K2 = 0,7)8 Table A.2 H/S of 70 (K1 = 0,7; K2 = 0,75)9 Table A.3 H/S of 65 and 60 (K1 = 0,7; K2 = 0,75)10 Table A.4 H/S of 55 and 50 (K1 = 0,7; K2 = 0,8)11 Table A.5 H/S of 45 (K1 = 0,85; K2 = 0,85
11、)12 Table A.6 H/S of 40 and 35 (K1 = 0,85; K2 = 0,9)13 Table A.7 H/S of 30 (K1 = 0,85; K2 = 0,9)14 Table B.1 Untitled15 Table B.2 Untitled15 Table B.3 Untitled15 Table B.4 Untitled16 Table B.5 Untitled16 Table B.6 Untitled18 Table D.1 Radial tyres (metric series) Other markings20 List of referencesI
12、nside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:08:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.1b:1996 ii BSI 11-1998 National foreword This Subsection of this Part of BS AU 50 has been prepared by Technical Committee AUE/4 and s
13、upersedes BS AU 50-1-1.1a:1995, which is withdrawn. It is identical with ISO 4000-1:1995 Passenger car tyres and rims Part 1: Tyres (metric series), published by the International Organization for Standardization (ISO). Other Parts of this standard are: Part 2: Wheels and rims; Part 3: Valves; Part
14、4: Rim profiles and dimensions. The Technical Committee has reviewed the provisions of ISO 3877-1:1978 and ISO 4223-1:1989 to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to incl
15、ude all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International standardCorresponding British Standard ISO 31-0:1992B
16、S 5775 Specification for quantities, units and symbols Part 0:1993 General principles (Identical) ISO 4000-2:1994BS AU 50 Tyre and wheels Part 4 Rim profiles and dimensions Section 1 Car rims Subsection 1.1:1995 Specification for metric series rims Summary of pages This document comprises a front co
17、ver, an inside front cover, pages i and ii, pages 1 to 20, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank Un
18、iversity, London South Bank University, Sat Dec 09 02:08:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.1b:1996 BSI 11-19981 1 Scope This part of ISO 4000 specifies the designation, dimensions and load ratings of the metric series of tyres primarily intended for passenger cars. ISO 4000-2
19、deals with requirements for rims. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 4000. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties
20、 to agreements based on this part of ISO 4000 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 31-0:1992, Quantities and units Part 0: General
21、 principles. ISO 3877-1:1978, Tyres, valves and tubes List of equivalent terms Part 1: Tyres. ISO 4000-2:1994, Passenger car tyres and rims Part 2: Rims. ISO 4223-1:1989, Definitions of some terms used in the tyre industry Part 1: Pneumatic tyres. 3 Definitions For definitions of terms relating to t
22、yres, see ISO 4223-1; equivalent terms are given in ISO 3877-1. 4 Tyre designation 4.1 Size and construction The characteristics shall be indicated as follows: 4.1.1 Nominal section width The nominal section width of the tyre shall be indicated in millimetres, ending either in 0 or 5, so that in any
23、 one series of tyres with the same nominal aspect ratio, the values shall all end with 0 or all end with 5. For sizes mounted on 5 tapered (code-designated) rims, the nominal section width shall end with 5. 4.1.2 Nominal aspect ratio The nominal aspect ratio shall be expressed as a percentage and sh
24、all be a multiple of 5. 4.1.3 Tyre construction code The tyre construction code shall be as follows: NOTE 1Radial tyres designed for some existing vehicles with maximum speed capabilities in excess of 210 km/h or 240 km/h may be designated and marked differently. See annex C. In the case of tyres de
25、signed for vehicles having a maximum speed capability in excess of 240 km/h, the code-letters “ZR” may be indicated in the dimensional and constructional characteristics for radial ply tyres in place of the tyre construction code R. (See also 4.2.) For speeds in excess of 300 km/h, the tyres shall b
26、e marked with the code-letters “ZR”. (See annex C.) NOTE 2The use of another code letter (for example, in the case of a new construction type) should first be remitted to ISO for acceptance. 4.1.4 Nominal rim diameter code For tyres mounted on 5 tapered (code-designated) rims, the code shall be as g
27、iven in Table 1. For tyres requiring new concept rims, for safety reasons especially concerning mounting, the code number shall be equal to the nominal rim diameter (Dr), expressed as a whole number of millimetres. Table 1 Nominal rim diameter code 4.2 Service description The service description sha
28、ll be indicated as follows: For the special case of tyres designed for vehicles having a maximum speed capability in excess of 300 km/h, the indication of the service description is not required. For the maximum speed capability and the load capacity of the tyres, the tyre manufacturer concerned sha
29、ll be consulted. Bfor bias-belted construction; Dfor diagonal construction; Rfor radial ply construction. Nominal rim diameter code Nominal rim diameter, Dr mm 10254 12305 13330 14356 15381 16406 17432 18457 19483 Load indexSpeed symbol Licensed Copy: London South Bank University, London South Bank
30、University, Sat Dec 09 02:08:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.1b:1996 2 BSI 11-1998 4.2.1 Load index The maximum tyre load capacity corresponding to the service conditions specified by the tyre manufacturer shall be indicated by a load index taken from Table 2. This indicatio
31、n is understood to be per tyre for a single mounting. 4.2.2 Speed symbol The speed category is assigned to a tyre to denote the maximum speed for which use of the tyre is rated. The speed symbol shall be indicated by a letter taken from Table 3 corresponding to the speed category. 4.3 Other service
32、characteristics 4.3.1 The word “TUBELESS” shall appear on the tyre to characterize tyres that can be used without a tube. 4.3.2 The letter “T” immediately in front of the tyre size designation shall be used to characterize high-pressure special temporary-use spare tyres. 4.3.3 Specific indications,
33、if required, may be added to indicate: the type of vehicle for which the tyre is primarily designed, using the symbol “P”1); the temporary use of certain spare tyres using indications such as “TEMPORARY USE ONLY”; the bias-belted construction with the words “BIAS-BELTED”; the radial ply construction
34、 with the word “RADIAL”; the direction of mounting; the direction of rotation; the type of tread pattern; other characteristics. 1) This symbol may be used where there may be ambiguity regarding the tyre type. Where this optional marking is used, it should be so positioned that confusion cannot resu
35、lt from its proximity to any other service condition marking. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:08:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.1b:1996 BSI 11-19983 Table 2 Correlation between load index (LI) and tyre load-carrying c
36、apacity (TLCC) TLCCTLCCTLCCTLCC LILILILI kgkgkgkg 5019070335906001101 060 5119571345916151111 090 5220072355926301121 120 5320673365936501131 150 5421274375946701141 180 5521875387956901151 215 5622476400967101161 250 5723077412977301171 285 5823678425987501181 320 5924379437997751191 360 6025080450
37、1008001201 400 6125781462101825 6226582475102850 6327283487103875 6428084500104900 6529085515105925 6630086530106950 6730787545107975 68315885601081 000 69325895801091 030 NOTE 1The maximum tyre load capacity corresponding to the load index applies for speeds up to and including 210 km/h. For speed
38、symbol V tyres (between 210 km/h and 240 km/h), the maximum load capacity per tyre is to be reduced to the value corresponding to the following percentage: 100 % at 210 km/h; 97 % at 220 km/h; 94 % at 230 km/h; 91 % at 240 km/h. Between these speeds, linear interpolation is permitted. NOTE 2In the c
39、ase of speed symbol W and Y, the maximum load capacity per tyre corresponding to the load index applies for speeds up to and including 240 km/h for W and 270 km/h for Y. For speed symbol W tyres (between 240 km/h and 270 km/h), the maximum load capacity per tyre is to be reduced to the value corresp
40、onding to the following percentage: 100 % at 240 km/h; 95 % at 250 km/h; 90 % at 260 km/h; 85 % at 270 km/h. Between these speeds, linear interpolation is permitted. For speed symbol Y tyres (between 270 km/h and 300 km/h), the maximum load capacity per tyre is to be reduced to the value correspondi
41、ng to the following percentage: 100 % at 270 km/h; 95 % at 280 km/h; 90 % at 290 km/h; 85 % at 300 km/h. Between these speeds, linear interpolation is permitted. For ZR marked tyres and/or for speeds over 300 km/h, consult the tyre manufacturer concerned for the maximum tyre load capacity permitted
42、in relation to the maximum speed allowed for the tyre. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:08:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.1b:1996 4 BSI 11-1998 Table 3 Correlation between speed symbol and speed category 5 Marking The
43、marking shall consist of: a) the designation of the size and construction; b) the designation of service condition characteristics;2) c) the designation of other service characteristics. The location of the marking of the load and speed characteristics shall be distinct, but near the marking of the
44、size and construction. No location is specified for the markings related to other service characteristics (see 4.3). EXAMPLE 1 A tyre having a) a size and construction of: nominal section width 165 mm, nominal aspect ratio 80, radial ply construction, nominal rim diameter code 15; b) service descrip
45、tion of: load index (LI) 87, corresponding to a tyre load-carrying capacity of 545 kg, speed symbol H, corresponding to a speed category of 210 km/h; c) other service characteristics: TUBELESS: tyre to be used without a tube; shall be marked as follows: 165/80 R 15 87 H TUBELESS NOTE 3See annex D fo
46、r other existing size markings. EXAMPLE 2 A tyre marked 225/45 ZR 16 has the following characteristics: nominal section width 225 mm; nominal aspect ratio 45; radial ply construction tyre designed for operations at speeds in excess of 240 km/h (code letters “ZR”); nominal rim diameter code correspon
47、ding to 406 mm (code 16). NOTE 4See annex C for special cases of radial tyres designed for speeds in excess of 210 km/h. 6 Tyre dimensions Except for the cases in 6.1.1 and 6.1.2, the formula-derived values for tyre dimensions are to be rounded to the nearest millimetre. For rounding, see ISO 31-0.
48、NOTE 5Dimensions are expressed in millimetres. 6.1 Calculation of “design tyre” dimensions 6.1.1 Theoretical rim width, Rth The theoretical rim width, Rth, is equal to the product of the nominal section width, SN, and the rim/section ratio, K1: Rth = K1SN For tyres mounted on 5 rims (code-designated
49、) with nominal rim diameter expressed by a two-figure code, K1 = 0,7 for tyres having nominal aspect ratio (H/S) from 50 to 95 inclusive; K1 = 0,85 for tyres having nominal aspect ratio (H/S) from 30 to 45 inclusive. Other K1 values will be defined later for other tyre and rim types. Speed symbol Speed category km/h J100 K110 L120 M130 N140 P150 Q160 R170 S180 T190 U200 H210 V240 W270 Ya300 NOTEThis list is not restrictive; other categories may be added later. a