BRITISH STANDARD AUTOMOBILE SERIES BS AU 50 1 3 2b 1997 ISO 4250 2 1995 Including Amendment 1 1997 Tyres and wheels — Part 1 Tyres — Section 3 Off the road tyres — Subsection 3 2b Specification for na[.]
BRITISH STANDARD AUTOMOBILE SERIES BS AU 50-1 3.2b:1 997 ISO 425 0-2: 995 Including Amendment 1:1997 Tyres and wheels — Part : Tyres — Section 3: Off-the-road tyres — Subsection 3.2b Specification for narrow and wide base tyre loads and inflation pressures IC S 0 ; 83 60 ; 83 60 9 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy BS AU 0-1 3.2b:1 997 National foreword This British Standard reproduces verbatim ISO 4250- 2: 995 (including Amendment : 997) and implements it as the UK national standard It supersedes BS AU 50- 2a: 991 which is withdrawn The UK participation in its preparation was entrusted to Technical Committee AUE/4, Tyres and wheels for motor vehicles, which has the responsibility to: — aid enquirers to understand the text; — present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; — monitor related international and European developments and promulgate them in the UK A list of organizations represented on this committee can be obtained on request to its secretary Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue 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, the ISO title page, pages ii to iv, pages to 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 This British Standard, having Amendments issued since publication been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on November 997 © BSI 04- 2000 ISBN 80 285 76 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Amd No Date Comments BS AU 0-1 3.2b:1 997 Contents Page National foreword Foreword Text of ISO 42 50- © BSI 04- 000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Inside front cover iii i ii Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy blank Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy BS AU 50-1 3.2b:1 997 Contents Page Foreword iii Scope Definitions Special conditions Selection for new machine design Inflation pressures — General Load/inflation tables Load capacities for earth- mover tyres on industrial vehicles Table — Diagonal ply rating marked narrow base tyres for earth- moving slow speed service, reference speed km/h (loaded conditions) Table — Diagonal ply rating marked narrow base tyres for earth- moving service for relatively short hauls, reference speed 50 km/h Table — Diagonal ply rating marked wide base tyres for earth- moving slow speed service, reference speed km/h (loaded conditions) Table — Diagonal ply rating marked wide base tyres for earth- moving service for relatively short hauls, reference speed 50 km/h Table — Diagonal ply rating marked 65 series tyres for earth- moving service Table — Diagonal ply rating marked tyres in grader service, reference speed 40 km/h Table — Diagonal ply rating marked tyres, reference speed km/h Table — Diagonal ply rating marked tyres for compactor service Table — Symbol- marked narrow base radial tyres, reference speed km/h (loaded conditions) Table — Symbol- marked wide base radial tyres, reference speed km/h (loaded conditions) Table 1 — Symbol- marked narrow base radial tyres, reference speed 50 km/h 10 Table — Symbol- marked wide base radial tyres, reference speed 50 km/h 10 Table — Symbol- marked 65 series radial tyres for earth- moving service 11 Table — Symbol- marked radial tyres for compactor service — Reference speed km/h (loaded conditions) 11 Table — Symbol- marked radial tyres in grader service, reference speed 40 km/h 12 Table — Load capacities for earth- mover tyres on industrial vehicles 12 Descriptors: Civil engineering, self- propelled machines, earth- moving equipment, tyres, pneumatic tyres, loads (forces) , load capacity, internal pressure ii Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy © BSI 04- 2000 BS AU 50-1 3.2b:1 997 Foreword 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 technical 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 closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization Draft 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 International Standard ISO 4250-2 was prepared by Technical Committee ISO/TC 31, , Subcommittee SC 6, This third edition cancels and replaces the second edition (ISO 4250-2:1991), of which it constitutes a technical revision ISO 4250 consists of the following parts, under the general title : — — — Tyres, rim s and v alv es Off- the- road tyres and rim s Earth- m ov er tyres and rim s Part : Tyre designation and dim ensions; Part 2: Lo ads and inflation p ressures; Part 3: Rim s © BSI 04-2000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy iii iv Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy blank BS AU 50-1 3.2b:1 997 Scope 2.1.1.5 ISO 4250 consists of three parts (see the Foreword) tyre ballast laying down the technical designation and (if used, this is also included in determination of dimensions of tyres and rims for earth- movers; it GMM ) also gives load tables for these tyres 2.1.1.6 This part of ISO 4250 gives working definitions of field modifications masses and load cycles, and specifies tyre loads and operating mass change due to machine alterations reference inflation pressures for narrow and wide made other than by the original manufacturer (such base tyres primarily intended for earth- mover as modifications for additional capacity, machines reinforcements, etc ) NOTE Terms used are in accordance with ISO 3877- : 978, Tyres, term s — Part : Tyres v alv es and tub es — List o f eq uiv alent Definitions For the purposes of this part of ISO 4250, the following definitions apply 2.1 Definitions of masses 2.1 maximum load 2.2 Definitions of operating conditions 2.2.1 maximum speed peak velocity attained by the machine 2.2.2 earth-moving haulage cycle cycle where machine self- loads or receives a load from loading equipment, transports it elsewhere and returns unloaded maximum loads of individual tyres determined by NOTE manufacturer’s rated gross machine mass (GMM) surfaces at medium speeds, up to 65 km/h, and short distances, distribution assigned to each axle, divided by the number of tyres for that axle NOTE The maximum GMM includes masses calculated in 2.1 1 to 2.1 inclusive 2.1 1 operating mass; net weight (deprecated) actual mass of the base machine with equipment specified by the manufacturer, operator (75 kg), full Transportation usually occurs over unimproved up to km away NOTE Machines in this category are mainly haulage trucks (dumpers) and tractor- scrapers 2.2.3 loader cycle cycle where the machine is used to pick up material and move it a short distance away NOTE Tyre loads fluctuate depending on the conditions involved when the equipment picks up the load fuel tank, and full lubricating, hydraulic and cooling NOTE systems distances are short, usually less than 75 m away 2.1 2.2.4 optional equipment mass Transportation speeds are low, up to km/h, and load-carry cycle difference in operating mass between the optional cycle where the machine, primarily intended for item and standard item replaced (such as engine, loader service, picks up a load, transports it brakes, tyres, etc ) elsewhere and returns unloaded NOTE NOTE This includes the operating mass of additional items offered by the manufacturer which are not replacements for standard items (such as cabs, body- liners, side- boards, to 600 m air- conditioners, etc ) NOTE 2.1 mass of special modifications difference in the operating mass of the machine due to modifications not previously covered in optional equipment mass (such as additional reinforcements, etc ) NOTE 2.2.5 dozer (tractor) cycle condition where a machine is used to move materials (usually earth) by pushing, dragging or payload NOTE 1 © BSI 04- 2000 Tyre manufacturers should be consulted for specific conditions grading Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Machines in this category consist mainly of loaders, logstackers and material- handling equipment 2.1 total mass of the material being carried Transportation usually occurs over unimproved surfaces at low speeds, up to 25 km/h, and short distances, up Tyre loads are relatively constant and speeds are low, up to km/h NOTE Travel distances vary depending on work situations BS AU 50-1 3.2b:1 997 2.2.6 Selection for new machine design grader cycle Selection of size and strength index of the tyre used condition where a machine is used in construction on each axle shall be based on the highest individual and road maintenance wheel load (determined by GMM distribution, NOTE Tyre loads are relatively constant during the work cycles NOTE Grader speeds are slower during working periods, including load transfer) and the machine application with typical transportation speeds reaching about 40 km/h Maximum load per tyre shall not be greater than NOTE specified in the applicable tables Travel distances vary depending on work situations 2.2.7 The performance of machines fitted with creep earth- mover tyres depends on the operating movement of equipment at a very low speed (commonly not over 20 m in 60 min) NOTE During creep motion, loads on the tyres are usually very high and consideration needs to be given to the type of conditions, and more particularly on the specific ground pressure which is governed by the inflation pressure It is therefore advisable to select tyre size on the basis of low inflation pressure surface over which the equipment is travelling NOTE Tyre manufacturers should be consulted for specific Inflation pressures — General conditions 5.1 Rim and wheel manufacturers should be 2.2.8 drive-away movement of a machine from one location to another under non- working conditions NOTE This movement occurs during transportation of a machine from site to site NOTE Tyre manufacturers should be consulted for specific conditions NOTE 20 consulted to determine if the rim and wheel are of sufficient strength for the intended service conditions (inflation pressure and load) 5.2 Inflation pressures shown in the load/inflation tables are reference pressures and not include any pressure build- up due to vehicle operation 5.3 In agreement with tyre manufacturers, inflation Load/speed/distance tables in this part of ISO 4250 not apply to drive- away conditions 2.3 Definition of vehicle type pressures may be varied to compensate for extremes of atmospheric temperature or special operating conditions 2.3.1 5.4 For all tables the inflation pressures are given industrial vehicle for guidance only; in actual practice they may be vehicle including counter- balanced lift trucks, varied according to the operating conditions, in container handlers, straddle carriers, aircraft tow agreement with the tyre manufacturers tractors, mobile crushers, logstackers Special conditions Load/inflation tables Load/inflation relations for diagonal ply rating tyres For longer hauls and/or speeds in excess of those are given in Table to Table 8; those for indicated in the tables, the tyre manufacturers symbol- marked radial tyres are given in Table to should be consulted for instructions regarding Table permissible loads and the required inflation pressures Load capacities for earth-mover tyres on industrial vehicles Load capacities for earth- mover tyres on industrial vehicles are given in Table Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy © BSI 04- 2000 BS AU 50-1 3.2b:1 997 Table — Diagonal ply rating marked narrow base tyres for earth-moving slow speed service, reference speed km/h (loaded conditions) Tyre size designation 12.00 – 20 12.00 – 24 and 12.00 – 25 13.00 – 24 and 13.00 – 25 14.00 – 24 and 14.00 – 25 16.00 – 24 and 16.00 – 25 18.00 – 24 and 18.00 – 25 18.00 – 33 18.00 – 49 21.00 – 24 and 21.00 – 25 © BSI 04-2000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Load Ply rating 14 16 14 16 18 20 12 18 20 22 10 12 16 20 24 28 12 16 20 24 28 32 36 12 16 20 24 28 32 36 40 28 32 36 24 28 32 16 20 24 28 kg 000 450 000 600 150 500 900 375 600 100 500 000 875 600 300 300 500 500 10 000 100 250 750 10 600 11 500 12 500 13 600 250 10 000 11 500 12 500 13 600 15 000 16 000 17 000 16 000 17 500 18 500 18 500 20 000 21 800 11 800 13 200 15 000 16 500 a Inflation pressure 600 700 325 575 675 750 825 300 450 675 750 825 275 350 425 550 700 850 925 325 425 550 650 750 875 975 275 375 475 550 650 750 850 950 650 750 850 550 650 750 325 400 500 575 kPa Tyre size designation 21.00 – 35 21.00 – 49 24.00 – 25 24.00 – 29 24.00 – 35 24.00 – 43 24.00 – 49 27.00 – 33 27.00 – 49 30.00 – 51 33.00 – 51 36.00 – 51 40.00 – 57 Load Ply rating 28 32 36 40 44 28 32 36 40 44 24 30 24 30 36 42 48 54 36 42 48 36 42 48 24 30 36 36 42 48 40 46 52 42 50 58 42 50 58 52 60 68 kg 19 500 21 200 23 000 24 300 25 000 23 600 25 000 27 250 29 000 30 750 18 000 20 000 19 000 21 800 26 500 29 000 31 500 34 500 30 000 32 500 34 500 32 500 34 500 37 500 22 400 25 750 29 000 36 500 40 000 43 750 45 000 48 750 53 000 51 500 56 000 61 500 58 000 65 000 71 000 80 000 87 500 92 500 a Inflation pressure 575 650 750 825 900 575 650 750 825 900 425 525 425 525 650 750 850 975 650 750 850 650 750 850 350 450 550 575 675 775 575 650 750 550 650 750 500 600 675 550 650 725 kPa a For stationary service conditions, the loads in this table may be increased up to 60 % with no increase in inflation pressure For special equipment with a high centre of gravity, consult the tyre manufacturer BS AU -1 b : 997 Tab le — D iagonal ply rating marke d narrow b ase tyre s for e arth-moving se rvice for relatively short hauls, refere nce spe e d km/h Tyre siz e de signation Lo ad Ply rating a Inflation Tyre siz e p re ssure kg de signation Lo ad 14 80 42 and 0 – 16 00 47 80 225 00 – 14 00 and 16 00 – Inflation p re ssure kg kPa 00 – a Ply rating kPa 28 600 42 32 00 500 36 5 00 550 375 40 00 62 250 45 44 00 67 18 550 500 24 00 32 20 75 550 30 1 800 40 60 200 24 1 00 32 00 – 12 00 300 30 00 40 and 18 87 45 36 5 00 47 00 – 20 00 500 42 00 550 22 250 550 48 00 65 575 75 54 00 72 10 00 225 36 00 47 00 – 12 350 75 42 00 575 and 16 00 375 48 600 65 00 – 20 62 47 36 00 47 24 50 575 42 0 00 550 28 60 65 48 800 65 12 87 225 16 87 32 24 00 75 20 45 40 30 5 00 350 36 00 40 36 2 00 42 42 00 500 48 00 575 28 00 75 34 00 350 40 2 00 42 00 – 0 – 49 0 – 0 – 0 – 0 – 43 0 – 49 00 – 33 and 00 – 24 28 70 47 575 32 300 65 36 75 72 12 16 00 – 00 20 75 60 500 0 – 49 200 75 350 30 00 – 33 24 300 42 28 00 500 40 750 42 32 75 575 46 00 500 52 0 00 550 42 0 00 42 50 3 00 500 and 00 – 36 00 – 3 00 – 49 00 – 250 30 00 – 51 62 40 75 70 28 250 500 32 00 575 36 60 62 58 5 00 575 24 60 42 42 00 375 28 1 80 500 50 00 45 32 85 575 58 41 50 52 16 90 250 52 46 50 42 20 75 300 60 0 00 47 24 75 375 68 5 00 550 28 500 42 28 1 200 42 33 00 – 51 0 – 40 0 – and 00 – 32 50 500 36 85 550 40 00 62 44 500 67 a Load adj us tment for m axim um s p eed km/h: load load 00 – × 0, 85 Load adj us tment for m aximum s p eed km/h: × 1,12 Values s o calculated to b e rounded off to the neares t: kg for loads up to 99 kg; kg for loads from 00 kg to 9 99 kg; 00 kg for loads equal to or ab ove 00 kg Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy © BS I 4- 00 BS AU 50-1 3.2b:1 997 Table — Diagonal ply rating marked wide base tyres for earth-moving slow speed service, reference speed km/h (loaded conditions) Tyre size designation 15.5 – 25 17.5 – 25 20.5 – 25 23.5 – 25 26.5 – 25 26.5 – 29 29.5 – 25 29.5 – 29 © BSI 04-2000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Load Ply rating 10 12 12 16 20 12 16 20 24 28 12 16 20 24 28 16 20 24 28 32 18 22 26 30 16 22 28 16 22 28 34 40 kg 250 875 600 750 150 300 250 700 250 500 10 300 11 500 000 500 10 900 12 500 13 600 11 500 13 200 14 000 15 500 17 000 12 850 14 500 16 000 17 500 12 850 15 000 17 500 14 000 16 000 19 000 21 200 23 600 a Inflation pressure 250 325 400 225 350 475 575 250 350 450 525 625 225 300 375 475 550 275 350 400 475 550 300 375 450 525 250 325 425 250 325 425 525 625 kPa Tyre size designation 29.5 – 35 33.25 – 29 33.25 – 35 33.5 – 33 33.5 – 39 37.25 – 35 37.5 – 33 37.5 – 39 37.5 – 51 40.5/75 – 39 Load Ply rating 22 28 34 26 32 38 26 32 38 26 32 38 26 32 38 30 36 42 30 36 42 28 36 44 28 36 44 30 38 46 kg 17 500 20 600 23 000 20 600 23 600 25 750 22 400 25 750 28 000 22 400 25 750 29 000 24 300 27 250 30 750 28 000 30 750 33 500 28 000 31 500 34 500 29 000 33 500 37 500 33 500 38 750 42 500 31 500 37 500 42 500 a Inflation pressure 325 425 525 350 450 525 350 450 550 350 425 525 350 425 525 375 450 525 375 450 525 350 450 550 350 450 525 325 425 525 kPa a For stationary service conditions, the loads in this table may be increased up to 60 % with no increase in inflation pressure For special equipment with a high centre of gravity, consult the tyre manufacturer BS AU -1 b : 997 Tab le — D iagonal p ly rating marke d wide b ase tyre s for e arth-moving service for re latively short hauls, refere nce sp ee d km/h Tyre siz e designatio n 5 – 25 Load Ply rating a Inflation Tyre siz e p re ssure kg de signation Load 575 75 00 225 12 250 250 80 50 12 65 225 16 250 300 20 00 40 12 500 200 16 45 75 20 00 32 24 70 40 28 500 47 12 300 75 16 50 225 20 300 300 24 00 350 28 75 40 33 25 – 29 33 25 – 35 Inflation p re ssure kg kPa 10 a Ply rating kPa 26 600 75 32 00 32 38 00 40 26 00 75 32 00 32 38 00 40 26 00 75 32 00 32 38 00 40 26 00 75 32 00 32 38 0 00 40 30 00 75 36 00 32 42 800 40 30 00 75 36 0 00 32 42 2 400 40 28 00 250 36 2 00 32 44 00 40 52 00 47 28 600 250 36 00 32 44 50 40 30 600 250 38 00 32 46 50 40 – 20 – 25 23 – 25 33 – 33 33 – 39 37 – 35 37 – 33 – 16 300 200 20 250 250 24 250 300 28 32 000 1 00 350 42 18 250 225 22 250 75 – 37 – 51 26 29 – 25 29 – 29 37 – 39 00 32 30 1 00 375 16 00 75 22 000 250 28 1 00 32 16 500 75 22 600 250 28 50 32 34 000 40 40 000 47 22 1 00 250 28 600 32 34 000 40 40 /7 – a Load adj us tment for m axim um s p eed km/h: load × 0, 83 Load adj us tment for m aximum s p eed km/h: load × 1,12 Values s o calculated to b e rounded off to the neares t: kg for loads up to 99 kg; kg for loads from 00 kg to 9 99 kg; 00 kg for loads equal to or ab ove 00 kg 29 – 35 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy © BS I 4- 00 BS AU 50-1 3.2b:1 997 Table — Diagonal ply rating marked 65 series tyres for earth-moving service Tyre size designation Ply rating Earth-moving service for Earth-moving slow speed service, relatively short hauls, reference speed km/h reference speed 50 km/h (loaded conditions) Inflation Load Inflation Load pressure pressure kg kg kPa kPa 12 375 75 300 50 16 50 225 500 32 20 800 75 750 400 16 700 00 900 75 20 500 50 500 350 16 00 00 1 500 75 20 50 50 00 350 24 000 300 000 42 24 1 500 50 000 350 30 850 300 2 00 42 36 500 375 600 52 30 — — 50 375 36 — — 000 450 45/65 – 45 38 — — 40 000 450 50/65 – 51 46 — — 500 450 5/65 – 30/65 – 30/65 – 35/65 – 33 40/65 – 39 Table — Diagonal ply rating marked tyres in grader service, reference speed 40 km/h Load Tyre size designation a 00 – TG Ply rating 00 – TG 00 – TG 00 – © BSI 04- 000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy 600 50 50 900 225 12 430 32 060 00 10 360 50 12 72 5 – – 300 14 000 350 500 75 800 designation kPa 10 00 – TG 700 225 12 075 75 14 450 32 16 650 375 Load Tyre size pressure kg 00 – TG Inflation – 5 – 12 650 225 14 000 75 16 500 32 12 125 00 a 16 000 75 SDC rims 5/65 – a Ply rating Inflation pressure kg kPa 950 50 10 80 75 12 650 225 120 125 12 900 00 14 000 225 16 350 75 20 650 32 12 550 75 16 000 225 20 500 75 12 000 50 16 750 00 20 450 50 12 350 125 16 125 75 “TG” is a designation to be used to identify tyres mounted on BS AU -1 b : 997 Tab le — D iagonal ply rating marke d tyre s, re fe re nce sp e ed km/h Inflation Lo ad Tyre siz e de signation a Ply rating Load inde x S p e e d symb ol p re ssure kg kPa 10 60 A2 500 40 12 65 A2 50 500 00 – TG 00 – TG 59 A2 375 300 10 64 A2 00 375 12 68 A2 60 45 14 71 A2 50 52 16 73 A2 500 60 63 A2 87 75 10 68 A2 60 350 12 72 A2 300 42 16 77 A2 300 550 12 76 A2 00 32 16 81 A2 250 42 00 – TG 00 – TG a “TG” is a des ignation to b e us ed to identify tyres mounted on S D C rim s Tab le — D iagonal p ly rating marked tyres for comp actor service Lo ad Tyre siz e de signatio n Ply rating Load inde x S p e e d symb o l Inflation p re ssure kg kPa 129 A2 85 40 12 42 A2 65 75 30 A2 90 40 10 49 A2 250 60 12 53 A2 65 72 14 55 A2 87 80 10 53 A2 65 52 12 56 A2 00 62 14 59 A2 375 72 16 62 A2 75 82 30 A2 90 300 12 62 A2 75 550 14 65 A2 50 65 16 67 A2 45 72 18 70 A2 00 82 20 72 A2 300 92 22 74 A2 70 025 00 – 10 57 A2 125 45 00 – 14 68 A2 60 60 00 – 18 80 A2 00 70 – – – 00 – /80 – 1 00 – NO TE For s ite- to- s ite trans fer, cons ult tyre/wheel manufacturer Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy © BS I 4- 00 BS AU 50-1 3.2b:1 997 Table — Symbol-marked narrow base radial Table — Symbol-marked wide base radial tyres, reference speed km/h tyres, reference speed km/h (loaded conditions) (loaded conditions) Tyre size designation 12.00 R 24 and 12.00 R 25 13.00 R 24 and 13.00 R 25 14.00 R 24 and 14.00 R 25 16.00 R 24 and 16.00 R 25 18.00 R 24 and 18.00 R 25 18.00 R 33 18.00 R 49 21.00 R 24 and 21.00 R 25 21.00 R 35 21.00 R 49 24.00 R 35 24.00 R 43 24.00 R 49 27.00 R 33 27.00 R 49 30.00 R 51 33.00 R 51 36.00 R 51 37.00 R 57 40.00 R 57 Symbol ÷ ÷÷ ÷÷÷ ÷÷ ÷÷÷ ÷÷ ÷÷÷ ÷ ÷÷ ÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ Load Inflation kg kPa tol ± 15 % a 150 900 300 000 500 500 10 000 000 12 150 11 800 16 000 18 500 23 000 20 600 24 300 29 000 30 750 34 500 37 500 37 500 45 000 56 000 65 000 80 000 82 500 100 000 pressure 550 800 950 800 950 800 950 550 800 550 800 800 800 800 800 800 800 800 800 800 800 800 800 800 800 800 a The tolerance on inflation pressure is in recognition of the wide variety of service conditions encountered Tyre size designation 15.5 R 25 17.5 R 25 20.5 R 25 23.5 R 25 26.5 R 25 26.5 R 29 29.5 R 25 29.5 R 29 29.5 R 35 33.25 R 29 33.25 R 35 33.5 R 33 33.5 R 39 37.25 R 35 37.5 R 33 37.5 R 39 37.5 R 51 40.5/75 R 39 Symbol ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ Load Inflation kg kPa tol.a ± 15 % 800 100 100 500 500 11 500 12 150 14 500 15 000 18 500 16 000 19 500 18 000 22 400 19 500 23 600 21 200 25 750 23 600 29 000 25 750 31 500 25 750 31 500 28 000 34 500 31 500 37 500 31 500 37 500 33 500 41 250 37 500 46 250 37 500 46 250 pressure 475 600 475 600 475 600 475 600 475 600 475 600 475 600 475 600 475 650 475 650 475 650 475 650 475 650 475 650 475 650 475 650 475 650 475 650 a The tolerance on inflation pressure is in recognition of the wide variety of service conditions encountered © BSI 04-2000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy BS AU -1 b : 997 Tab le 1 — S ymb ol-marke d narrow b ase Tab le — S ymb ol-marked wide b ase radial radial tyres, refere nce spe ed km/h tyre s, re fere nce sp ee d km/h Lo ad Tyre siz e de signation 12.00 R 24 and 12.00 R 25 13.00 R 24 and 13.00 R 25 14.00 R 20 and 14.00 R 21 14.00 R 24 and 14.00 R 25 16.00 R 20 and 16.00 R 21 16.00 R 24 and 16.00 R 25 18.00 R 24 and 18.00 R 25 18.00 R 33 18.00 R 49 21.00 R 24 and 21.00 R 25 21.00 R 35 21.00 R 49 24.00 R 35 24.00 R 43 24.00 R 49 27.00 R 33 27.00 R 49 30.00 R 51 30.00 R 51 36.00 R 51 37.00 R 57 40.00 R 57 a p re ssure S ymb ol ÷÷ ÷÷÷ ÷÷ ÷÷÷ ÷ ÷÷ ÷÷ ÷÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ ÷÷ Inflation kg 000 250 750 875 750 000 600 800 150 900 450 300 100 250 10 900 13 600 12 150 14 500 17 500 18 500 20 600 21 800 21 800 27 250 33 500 38 750 46 250 53 000 60 000 a Load adjustment for maximum speed 65 km/h: load × 0,88 kPa tol.b ± 15 % 650 700 650 700 450 650 650 700 450 650 450 650 450 650 650 650 650 650 650 650 650 650 650 650 650 650 650 725 725 Load adjustment for maximum speed 15 km/h: load × 1,12 Values so calculated to be rounded off to the nearest: 25 kg for loads up to 999 kg; 50 kg for loads from 000 kg to 999 kg; 100 kg for loads equal to or above 10 000 kg b Tolerance on inflation pressure in recognition of the wide variety of service conditions encountered 10 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Lo ad Tyre siz e de signation 15.5 R 25 17.5 R 25 20.5 R 25 23.5 R 25 26.5 R 25 26.5 R 29 29.5 R 25 29.5 R 29 29.5 R 35 33.25 R 29 33.25 R 35 33.5 R 33 33.5 R 39 37.25 R 35 37.5 R 33 37.5 R 39 37.5 R 51 40.5/75 R 39 S ymb ol ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ a Inflation p re ssure kg 550 500 125 450 600 300 100 250 000 11 500 500 12 500 10 900 14 000 11 500 15 000 12 500 16 000 14 000 18 500 15 500 20 000 15 500 20 000 16 500 21 800 18 500 23 600 18 500 24 300 20 000 25 750 22 400 29 000 22 400 29 000 a Load adjustment for maximum speed 65 km/h: load × 0,88 kPa tol.b ± 15 % 350 475 350 475 350 475 350 475 350 475 350 475 350 475 350 475 350 500 350 500 350 500 350 500 350 500 350 500 350 500 350 500 350 500 350 500 Load adjustment for maximum speed 15 km/h: load × 1,12 Values so calculated to be rounded off to the nearest: 25 kg for loads up to 999 kg; 50 kg for loads from 000 kg to 999 kg; 100 kg for loads equal to or above 10 000 kg b Tolerance on inflation pressure in recognition of the wide variety of service conditions encountered © BSI 04-2000 BS AU 50-1 3.2b:1 997 Table — Symbol-marked 65 series radial tyres for earth-moving service Tyre size designation Earth-moving service for Earth-moving slow speed service, relatively short hauls, reference reference speed km/h speed km/h (loaded conditions) Symbol Inflation Load Inflation Load pressure pressure kg ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ ÷ ÷÷ /65 R /65 R /65 R /65 R 3 40 /65 R 45 /65 R 45 /65 R 45 /65 R kg kPa kPa 80 32 60 47 75 45 85 62 00 32 5 00 47 600 45 00 62 500 32 00 47 1 00 45 00 62 600 350 00 500 00 500 27 250 65 00 350 31 500 500 — — 37 500 65 600 350 40 00 500 — — — — 00 350 42 0 500 — — 00 65 00 350 54 500 500 — — 65 00 65 Table — Symbol-marked radial tyres for compactor service — Reference speed km/h (loaded conditions) Load Tyre size designation Load index Speed symbol Inflation pressure kg kPa R 43 A2 72 80 R 46 A2 00 80 00 R 66 A2 00 95 00 R 89 A2 00 90 1 /80 R 61 A2 62 00 3/80 R 70 A2 00 90 7/80 R 95 A2 50 85 NO TE © For s ite- to- s ite trans fer, cons ult tyre/wheel manufacturer BS I 4- 00 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy 11 BS AU -1 b : 997 Tab le — S ymb ol-marke d radial tyres in grade r se rvice , re fe re nce spe e d km/h Tyre siz e de signation a S ymb ol ÷ ÷ ÷ ÷ ÷ ÷ ÷ ÷ ÷ ÷ ÷ 10.00 R 24 TG 12.00 R 24 TG 13.00 R 24 TG 14.00 R 24 TG 16.00 R 24 TG 18.00 R 25 15.5 R 25 17.5 R 25 20.5 R 25 23.5 R 25 25/65 R 25 Lo ad Inflation kg p re ssure 950 575 000 650 625 600 000 650 625 000 000 375 375 375 375 375 375 300 300 300 300 300 kPa a “TG” is a designation to be used to identify tyres mounted on SDC rims Tab le — Load cap acitie s for e arth-mover tyre s on industrial vehicle s Maximum sp e e d whe n loade d Static Creep km/h 10 km/h 15 km/h 20 km/h 25 km/hd O ff-road + 60 % + 30 % + 13 % –7% – 12 % – 15 % a bc H ard imp rove d surface s + 80 % + 60 % + 45 % + 35 % + 30 % + 27 % + 25 % NOTE For intermediate speeds, interpolations are permitted a Inflation pressure for off-road service: use 10 km/h reference speed tables b Inflation pressure for hard improved surfaces: use 10 km/h pressure × 1,2 c For steer-wheel loads on lift trucks, multiply “hard improved surface” load ratings by 0,8 d For speeds above 25 km/h, consult the tyre manufacturer 12 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy © BSI 04-2000