BS-AU-50-1.7.1-1989.pdf

BRITISH STANDARD AUTOMOBILE SERIES BS AU 50-1.7.1:1989 ISO 5995-1: 1982 Tyres and wheels Part 1: Tyres Section 7: Moped tyres Subsection 7.1 Specification for tyre designations, dimensions and load ratings ISO title: Moped tyres and rims Part 1: Tyres UDC 629.113.012.5:(083.3):629.118.35:006.3/.8 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.7.1:1989 This British Standard, having been prepared under the direction of the Automobile Standards Committee, was published under the authority of the Board of BSI and comes into effect on 28 February 1989 © BSI 02-2000 The following BSI references relate to the work on this standard: Committee reference AUE/4 Draft for comment 78/71455 DC ISBN 0 580 17133 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Automobile Standards Committee (AUE/-) to Technical Committee AUE/4, 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 Bus and Coach Council Department of Transport Freight Transport Association Ministry of Defence Motor Cycle Association of Great Britain Motor Industry Research Association Retread Manufacturers Association Road Haulage Association Ltd. Society of Motor Manufacturers and Traders Ltd. Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.7.1:1989 © BSI 02-2000i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Field of application1 3References1 4Definitions1 Section 1. Tyre designation and dimensions 5Tyre designation1 6Tyre dimensions1 7Method of measurement of tyre dimensions2 Section 2. Load ratings 8Load capacities and inflation pressures3 Annex Tyres for small cubic capacity motorcycles and mopeds6 Table 1 Nominal rim diameter code1 Table 2 Section height1 Table 3 Moped tyres in highway service Designation and dimensions Rim diameter code: 14 to 222 Table 4 Moped tyres in highway service Designation and dimensions Rim diameter code: 8 to 123 Table 5 Maximum load capacity for corresponding inflation pressure Rim diameter code: 14 to 224 Table 6 Maximum load capacity for corresponding inflation pressure Rim diameter code: 8 to 125 Table 7 Load capacities and relevant inflation pressures6 Publications referred toInside back cover Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.7.1:1989 ii © BSI 02-2000 National foreword This Subsection of this Part of BS AU 50, prepared under the direction of the Automobile Standards Committee, is identical with ISO 5995-1:1982 (confirmed 1987) “Moped tyres and rims Part 1: Tyres” published by the International Organization for Standardization (ISO). Other Parts of the standard are: Part 2: Wheels and rims; Part 3: Valves. Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. Wherever the words “International Standard” appear, referring to this standard, they should be read as “Subsection of BS AU 50”. The comma has been used as a decimal marker. In British Standards it is current practice to use a full point on the baseline as the decimal marker. Cross-references. There are no corresponding British Standards for ISO 3833:1977 or ISO 4223-1:1978. The Technical Committee has reviewed the provisions of ISO 3833 and ISO 4223-1 and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include 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. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, 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 University, London South Bank University, Sat Dec 09 02:05:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.7.1:1989 © BSI 02-20001 1 Scope This International Standard establishes the designation, dimensions, and load ratings for moped tyres.1) ISO 5995-2 will deal with requirements for rims.2) 2 Field of application This International Standard applies to moped tyres, having a maximum speed of 50 km/h, fitted on rims with a nominal diameter corresponding to the codes 8 9 10 12 14 15 16 17 18 19 22. 3 References ISO 3833, Road vehicles Types Terms and definitions. ISO 4223-1, Definition of some terms used in the tyre industry Part 1: Pneumatic tyres. 4 Definitions For the purposes of this International Standard, the definitions given in ISO 4223-1 as well as the following definition apply. 4.1 moped a two-wheeled or three-wheeled motor-driven vehicle, with a maximum design speed not exceeding 50 km/h. If the driving motor is a thermic engine, its displacement or equivalent capacity must not exceed 50 cm3 Definition given in ISO 3833 Section 1. Tyre designation and dimensions 5 Tyre designation The designation shall be shown on the sidewall of the tyre and shall include dimensional and service characteristics marking, and such markings shall be close to each other. 5.1 Dimensional characteristics shall include: 5.1.1 Nominal section width The nominal section width shall be expressed by a code (see Table 2 for code correlations). 5.1.2 Nominal rim diameter The nominal rim diameter shall be expressed by a code (see Table 1 for code correlations). 5.2 Service characteristics shall include the word “MOPED” or “CYCLOMOTEUR” or “CICLOMOTORE”. 6 Tyre dimensions 6.1 Calculation of “design new tyre” dimensions 6.1.1 Design new tyre overall diameter (Do) The design new tyre overall diameter is the sum of the nominal rim diameter (Dr) plus twice the design new tyre section height (H): Do= Dr+ 2 H For those tyres using a nominal rim diameter code, see, in Table 1, the value of Dr to be used. Table 1 Nominal rim diameter code 6.1.2 Design new tyre section height (H) For the design new tyre section height (H) corresponding to nominal section width (SN), see Table 2. Table 2 Section height 1) An International Standard is in preparation relating to a special series of moped tyres having a maximum speed of 100 km/h. 2) In preparation. Code Nominal rim diameter Dr mm 8 9 10 12 14 15 16 17 18 19 22 203 229 254 305 356 381 406 432 457 483 559 Nominal section width SN Code Section height H mm 1 3/4 2 2 1/4 2 1/2 2 3/4 3 3 1/4 53 56 63 71 76 82 90 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.7.1:1989 2 © BSI 02-2000 6.2 Calculation of “maximum overall (grown) tyre dimensions in service” These dimensions include protective ribs, lettering, embellishment, manufacturing tolerances, special tread configurations and growth due to service. 6.2.1 Maximum overall (grown) width in service (Wmax) The maximum overall width in service is equal to the product of the design new tyre section width (S) by the coefficient 1,08: Wmax= 1,08 S 6.2.2 Maximum overall (grown) diameter in service (Do max) The maximum overall diameter in service is equal to the nominal rim diameter (Dr) plus twice the product of the design new tyre section height (H) by the coefficient 1,08: Do= Dr+ 2,16 H 6.3 Design new tyre dimensions and overall tyre dimensions in service Table 3 give design new tyre dimensions in service for tyres designated rim diameter codes 14 to 22. Table 4 is for rim diameter codes 8 to 12. 7 Method of measurement of tyre dimensions Before measuring, tyres shall be mounted on the measuring rim, inflated to the recommended pressure, 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 3 Moped tyres in highway service Designation and dimensions Rim diameter code: 14 to 22 Dimensions in millimetres Tyre designation Measuring rim width RM Design new tyre dimensionsGrown tyre dimensions in service Section width S Outer diameter Do Maximum overall section width Wmax Maximum overall diameter Do max 1 3/419MOPED or CYCLOMOTEUR or CICLOMOTORE 30,55058954597 214 216 217 218 219 222 ” ” ” ” ” ” 34,055 468 518 544 569 595 670 59 477 527 553 578 604 680 2 1/414 2 1/415 2 1/416 2 1/417 2 1/418 2 1/419 2 1/422 ” ” ” ” ” ” ” 3862 482 507 532 558 583 609 685 67 492 517 542 568 593 619 695 2 1/215 2 1/216 2 1/217 2 1/218 2 1/219 ” ” ” ” ” 40,568 523 548 574 599 625 73 534 559 585 610 636 2 3/415 2 3/416 2 3/417 2 3/418 ” ” ” ” 47,075 533 558 584 609 81 545 570 596 621 317”47,08159687609 3 1/418”558963796651 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.7.1:1989 © BSI 02-20003 Table 4 Moped tyres in highway service Designation and dimensions Rim diameter code: 8 to 12 Section 2. Load ratings 8 Load capacities and inflation pressures 8.1 The load capacities and the relevant inflation pressures shown in the tables refer to the maximum speed of 50 km/h in the case of tyres marked in accordance with 5.2. Dimensions in millimetres Tyre designation Measuring rim width RM Design new tyre dimensionsGrown tyre dimensions in service Section width S Outer diameter Do Maximum overall section width Wmax Maximum overall diameter Do max 212MOPED or CYCLOMOTEUR or CICLOMOTORE 34,05541759426 2 1/412”386243167441 2 1/28 2 1/29 ” ” 44,570 345 371 76 356 382 2 3/49”44,57338179393 310 312 ” ” 53,384 418 469 91 431 482 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.7.1:1989 4 © BSI 02-2000 Table 5 Maximum load capacity for corresponding inflation pressure Rim diameter code: 14 to 22 Tyre designationa Maximum load capacity, kg Inflation pressureb 250 kPa Inflation pressureb 275 kPa 1 3/419MOPED or CYCLOMOTEUR or CICLOMOTORE 80 214 216 217 217 REINFORCED 218 219 222 ” ” ” ” ” ” 75 80 85 85 90 95 110 2 1/414 2 1/415 2 1/416 2 1/416 REINFORCED 2 1/417 2 1/417 REINFORCED 2 1/418 2 1/419 2 1/419 REINFORCED 2 1/422 2 1/422 REINFORCED ” ” ” ” ” ” ” 90 90 95 100 105 105 115 130 135 145 155 2 1/215 2 1/216 2 1/216 REINFORCED 2 1/217 2 1/218 2 1/219 2 1/219 REINFORCED ” ” ” ” ” 105 110 115 120 120 150 155 165 2 3/415 2 3/416 2 3/416 REINFORCED 2 3/417 2 3/417 REINFORCED 2 3/418 ” ” ” ” 120 125 130 135 170 175 317 317 REINFORCED ”145 195 3 1/418”175 a Reinforced may be replaced by the abbreviation “REINF”. b 1 kPa = 102bar Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.7.1:1989 © BSI 02-20005 Table 6 Maximum load capacity for corresponding inflation pressure Rim diameter code: 8 to 12 Tyre designationa Maximum load capacity, kg Inflation pressureb 250 kPa Inflation pressureb 275 kPa 212MOPED or CYCLOMOTEUR or CICLOMOTORE 70 2 1/412”80 2 1/28 2 1/28 REINFORCED 2 1/29 ” ” 75 80 105 2 3/49”90 310 312 ” ” 110 120 a Reinforced may be replaced by the abbreviation “REINF”. b 1 kPa = 102bar Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.7.1:1989 6 © BSI 02-2000 Annex Tyres for small cubic capacity motorcycles and mopeds (not part of the Standard.) Some tyres of similar size designation and dimensions to those shown in Table 3 but with different performance capabilities are manufactured. These tyres designed for a maximum speed of 100 km/h have the following differences: a) the word “MOPED” or “CYCLOMOTEUR” or “CICLOMOTORE” is not marked on the tyre sidewall; b) the service characteristics indicating the “LOAD INDEX” and the “SPEED SYMBOL” may be marked on the tyre side wall. NOTESpeed symbol “J” (100 km/h) would apply; c) the load capacities and relevant inflation pressures appropriate to a maximum speed of 100 km/h, are shown in 7; d) the load capacities of Table 7 can be increased by up to 30 % when the above tyres are fitted on mopeds (max speed 50 km/h) designed for carrying an additional passenger. The relevant inflation pressure must be fixed by agreement with the relevant tyre manufacturer. Table 7 Load capacities and relevant inflation pressures Tyre designationaLoad capacity, kg Inflation pressure, kPab 216 217 REINF 218 219 20 J 31 J 22 J 24 J 80 109 85 90 250 275 250 250 2 1/415 2 1/416 2 1/416 REINF 2 1/417 2 1/417 REINF 2 1/418 2 1/419 24 J 26 J 38 J 28 J 39 J 30 J 30 J 90 95 132 100 136 106 106 250 250 275 250 275 250 250 2 1/216 2 1/216 REINF 2 1/217 2 1/217 REINF 2 1/218 2 1/219 2 1/219 REINF 31 J 42 J 33 J 43 J 35 J 35 J 45 J 109 150 115 155 121 121 165 250 275 250 275 250 250 275 2 3/416 2 3/417 2 3/417 REINF 36 J 38 J 47 J 125 132 175 250 250 275 317 317 REINF 318 41 J 51 J 42 J 145 195 150 250 275 250 3 1/41847 J175250 a “REINF” may be replaced by “REINFORCED” in the tyre size designation. b 1 kPa = 102 bar. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.7.1:1989 © BSI 02-2000 Publications referred to See national foreword. Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 02:05:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS AU 50-1.7.1:1989 ISO 5995-1: 1982 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone fi