1、 Reference numberISO 29802:2009(E)ISO 2009INTERNATIONAL STANDARD ISO29802First edition2009-11-01All terrain (AT) tyres and rims Symbol marked pneumatic tyres on 5 degrees tapered rims Designation, dimension, marking and load ratings Pneumatiques et jantes tout terrain Pneumatiques marqus par un symb
2、ole pour jantes repos de talon conique 5 degrs Dsignation, dimensions, marquage et coefficients de charge ISO 29802:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the t
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7、Web www.iso.org Published in Switzerland ii ISO 2009 All rights reservedISO 29802:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Tyre size designations2 4.1 Dimensional and constructional characteristics .2 4.2 Service
8、condition.3 4.3 Other service characteristics .4 5 Marking.4 6 Tyre dimensions 5 6.1 General .5 6.2 Calculation of design tyre dimensions .5 6.3 Calculation of “maximum overall tyre dimensions”6 6.4 Calculation of “maximum overall grown tyre dimensions”6 6.5 Calculation of “minimum tyre dimensions”
9、.7 6.6 Range of approved rim widths.8 7 Method of measurement of tyre dimensions8 8 Reference load-carrying capacity9 9 Load ratings .9 10 Inflation pressures 9 11 Rims10 11.1 Designation and marking10 11.2 Rim contours .10 11.3 Rim diameter and hump circumference11 12 Valve hole.12 12.1 General .12
10、 12.2 Snap-in valves .12 ISO 29802:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO te
11、chnical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates close
12、ly with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft
13、 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. Attention is drawn to the possibility that some of the elements of this docume
14、nt may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 29802 was prepared by Technical Committee ISO/TC 31, Tyres, rims and valves, Subcommittee SC 10, Cycle, moped, motorcycle tyres and rims. INTERNATIONAL STANDARD ISO 29802:2009
15、(E) ISO 2009 All rights reserved 1All terrain (AT) tyres and rims Symbol marked pneumatic tyres on 5 degrees tapered rims Designation, dimension, marking and load ratings 1 Scope This International Standard specifies the designations, dimensions, markings and load ratings of pneumatic tyres primaril
16、y intended for all terrain vehicles (ATV). It also specifies the designation, marking and contours of rims. The tyres are based on the following parameters: a) speeds not exceeding 130 km/h (speed symbol M); b) fitted to (AT) 5 tapered drop centre rims; c) nominal rim diameter codes of 7 to 14 inclu
17、sive. 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 31-0:1992, Quant
18、ities and units Part 0: General principles ISO 3877-1, Tyres, valves and tubes List of equivalent terms Part 1: Tyres ISO 4223-1:2002, Definitions of some terms used in the tyre industry Part 1: Pneumatic tyres 3 Terms and definitions For the purposes of this document, the terms and definitions give
19、n in ISO 4223-1, ISO 3877-1 and the following apply. 3.1 NHS not for highway service marking that identifies tyres for off-road applications ISO 29802:2009(E) 2 ISO 2009 All rights reserved4 Tyre size designations 4.1 Dimensional and constructional characteristics 4.1.1 General The characteristics s
20、hall be indicated as follows: Prefix Nominal overall diameter code Nominal section widthcode Tyre construction code Nominal rim diameter code Example AT 23 10 - 10 4.1.2 Prefix AT (all terrain) identifies tyres and rims designated for service on all terrain vehicles (ATV). 4.1.3 Nominal overall diam
21、eter code The code shall be as given in Table 1. Table 1 Nominal overall diameter code Nominal overall diameter code Design tyre overall diameter, Do mm 16 406 18 457 19 483 20 508 21 533 22 559 23 584 24 610 25 635 26 660 27 686 4.1.4 Nominal section width code The nominal section width of the tyre
22、 shall be indicated by means of a code with steps of 1 unit starting from 6. ISO 29802:2009(E) ISO 2009 All rights reserved 34.1.5 Tyre construction code The tyre construction code shall be as follows: D or “-” (a dash) for diagonal ply construction; R for radial ply construction. 4.1.6 Nominal rim
23、diameter code The code shall be as given in Table 2. Table 2 Nominal rim diameter code Nominal rim diameter code Nominal rim diameter, Drmm 7 178 8 203 9 229 10 254 11 279 12 305 13 330 14 356 4.2 Service condition 4.2.1 General The tyre shall be marked with a symbol and a service condition descript
24、ion. In the case of tyres restricted to off-road service and marked “NHS”, the marking of the service condition description is optional. 4.2.2 Symbol of reference inflation pressure Symbols shall be used to identify the reference inflation pressure given in Table 3. Table 3 Reference inflation press
25、ures Symbol Inflation pressure kPa 25 35 45 ISO 29802:2009(E) 4 ISO 2009 All rights reserved4.2.3 Service condition description 4.2.3.1 General The service condition description shall be indicated as follows: Load index Speed symbol (example 35 F) 4.2.3.2 Load index The load index is a numerical cod
26、e associated with the maximum load a tyre can carry at the speed indicated by its speed symbol under service conditions specified by the tyre manufacturer. The correlation between load indices and tyre load carrying capacities shall be as given in Annex A of ISO 4223-1:2002. 4.2.3.3 Speed symbol The
27、 speed symbol shall be as given in Table 4. The speed symbol or speed category indicates the reference speed defined as the speed at which the tyre can carry the load corresponding to its load index under the specified service description. Table 4 Correlation between speed symbol and speed category
28、Speed symbol Speed category km/h Fa80aaThe reference speed for tyre load identification of all terrain tyres shall be 80 km/h, i.e. speed symbol F. 4.3 Other service characteristics 4.3.1 The word “TUBELESS” shall be used to characterize tyres that can be used without a tube. 4.3.2 Specific indicati
29、ons, if required, may be added to show, for example, the preferred direction of rotation, indicated by an arrow. 5 Marking The marking shall consist of: a) the designation of the dimensional and constructional characteristics; b) service condition description; c) other service characteristics. The l
30、ocation of the marking of the service condition description (load index and speed symbol) and the symbol identifying the reference inflation pressure shall be distinct but in the vicinity of the marking of the dimensional and constructional characteristics. No location is specified for the markings
31、related to other service characteristics (see 4.3). EXAMPLE AT 20 10 9 34 F ISO 29802:2009(E) ISO 2009 All rights reserved 5The characteristics of a tyre with the above markings are as follows: AT: tyre designated for service intended for service on all terrain vehicles (ATV); 20: nominal overall di
32、ameter code; 10: nominal section width code; - : diagonal ply construction; 9 : nominal rim diameter code; : symbol to identify a reference inflation pressure of 35 kPa; 34: load index (LI) corresponding to a tyre load capacity of 118 kg; F: speed symbol corresponding to a speed category of 80 km/h.
33、 6 Tyre dimensions 6.1 General The formula-derived values for design tyre dimensions shall be rounded to the nearest millimetre. For rounding of values, see ISO 31-0:1992, Annex B. 6.2 Calculation of design tyre dimensions 6.2.1 Theoretical rim width, RthThe theoretical rim width, Rth, is equal to t
34、he product of the nominal section width, Sn, (see Table 8) and to the rim/section ratio, K1, where the value of K1is 0,8 rounded to the nearest standardized rim width code. th 1 nR KS= 6.2.2 Measuring rim width, RmMeasuring rim width, Rm, enables one to select the nearest standardized rim width code
35、 from Rth(see Table 8). 6.2.3 Design tyre section width, S The design tyre section width, S, is given in Table 8. ()nmth0,4SS R R=+ 6.2.4 Design tyre overall diameter, DoThe design tyre overall diameter, Do, is given in Table 1. 6.2.5 Design tyre section height, H The design tyre section height, H,
36、is equal to half the value given by the design tyre overall diameter, Do, minus the nominal rim diameter, Dr. ISO 29802:2009(E) 6 ISO 2009 All rights reserved()or2D DH= For the values of Drto be used, see Table 2. 6.3 Calculation of “maximum overall tyre dimensions” 6.3.1 General This calculation is
37、 for use by vehicle manufacturers in designing for tyre clearance. These dimensions shall be calculated with the coefficients (see Table 5) appropriate to the tyre nominal section width code and the design tyre section height. 6.3.2 Maximum tyre overall width, WmaxThe maximum tyre overall width, Wma
38、x, is equal to the product of the design tyre section width, S, and the appropriate coefficient a: maxWSa= where a = 1,07 for nominal section width code u 10; a = 1,06 for nominal section width code W 11. 6.3.3 Maximum tyre overall diameter, Do,maxThe maximum tyre overall diameter, Do,max, is equal
39、to the nominal rim diameter, Dr, (see Table 2) plus twice the product of the design tyre section height, H, and the appropriate coefficient, rounded to the nearest millimetre: ()o,max r2D DHb=+ where b = 1,06. 6.4 Calculation of “maximum overall grown tyre dimensions” 6.4.1 General These dimensions
40、shall be calculated with the coefficients (see Table 5) appropriate to the tyre construction and maximum tyre dimensions. ISO 29802:2009(E) ISO 2009 All rights reserved 7Table 5 Coefficients for calculation of maximum grown overall tyre dimensions in service Coefficients Tyre construction Speed km/h
41、 c d 60 1,07 80 1,09 100 1,09 1,11 Diagonal/radial 100 a a aConsult tyre manufacturer. 6.4.2 Maximum grown tyre overall width in service, WGThe maximum grown tyre overall width in service, WG, is equal to the product of the design tyre section width, S, and the appropriate coefficient, c, referring
42、to the vehicle design maximum speed capability (see Table 5): GWSc= 6.4.3 Maximum dynamic tyre overall diameter in service, Do,dynThe maximum tyre overall diameter in service, Do,dyn, is equal to the product of the maximum overall diameter in service, Do,max, and the appropriate coefficient, d, refe
43、rring to the vehicle design maximum speed capability (see Table 5): o,dyn o,maxD Dd= 6.5 Calculation of “minimum tyre dimensions” 6.5.1 General These dimensions shall be calculated with the coefficients appropriate to the design tyre section width and design tyre section height. 6.5.2 Minimum tyre s
44、ection width, SminThe minimum tyre section width, Smin, is equal to the product of the design tyre section width, S, and the appropriate coefficient: min0,95SS= 6.5.3 Minimum tyre overall diameter, Do,minThe minimum tyre overall diameter, Do,min, is equal to the nominal rim diameter, Dr, plus twice
45、the product of the design tyre section height, H, and the appropriate coefficient: ()o,min r20,94DDH=+ ISO 29802:2009(E) 8 ISO 2009 All rights reserved6.6 Range of approved rim widths The range of approved rim widths is calculated as the product of the nominal section width, Sn, and the coefficients
46、 shown in Table 6 rounded to the nearest standardized rim width code. Table 6 Approved rim widths Approved rims Minimum Maximum 0,65 0,85 7 Method of measurement of tyre dimensions Before being measured, the tyre shall be mounted on its measuring rim, see Table 8, inflated to the recommended pressur
47、e, see Table 7, and allowed to stand for a minimum of 24 h at normal room temperature, after which the inflation pressure shall be readjusted to the original value. Table 7 Inflation pressures to measure dimensions Symbol Inflation pressure kPa 20 30 40 Table 8 Tyre dimensions and approved rims Dime
48、nsions in millimetres Nominal section width code Measuring rim width code Design section width Maximum grown tyre overall width in service Approved rim width code SnRmS WGminimum maximum 6 5.00 154 168 4.0 AT 5.0 AT 7 5.50 177 193 4.5 AT 6.0 AT 8 6.50 204 222 5.0 AT 7.0 AT 9 7.00 227 247 6.0 AT 7.5
49、AT 10 8.00 254 277 6.5 AT 8.5 AT 11 9.00 281 306 7.0 AT 9.5 AT 12 9.50 304 331 8.0 AT 10.0 AT 13 10.50 331 361 8.5 AT 11.0 AT ISO 29802:2009(E) ISO 2009 All rights reserved 98 Reference load-carrying capacity 8.1 The 100 % reference load-carrying capacity is the load corresponding to the load index marked on the tyre. 8.2 The load-carrying capacities are calculated at inflation pressure of 25 kPa for the basic load v
