Bsi bs au 050 1 3 1a 1991 (iso 4250 1 1988) scan

B S I BS*AU
-.
*=-e?

*SO: PTL

:SUBSEC*3.1 A

91

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0249041

BRITISH STANDARD AUTOMOBTTIE SERIES

O
B SAU50:
hX t1 :

Subsection 3.ia
1991

Is0 4m1 : 1988

Tyres and wheels

(Including A mendment 1: 1 990)
(Superseding BS A U 50

part

1

: Subsection

TW-2D

14 pages

Part 1. Tyres

Section 3. Off-the-roadtyres
Subsection 3. l a Specification for narrow
and wide base tyre designations and
dimensions

Pneumatiques e t roues

Reifen und Räder

Partie 1. Pneumatiques

Teil

S ection 3. Pneumatiques pour engins de génie

Abschnitt 3. Geländereifen

civil

Unterabs chnitt 3. l a Normal- und

S ous-section 3. l a Désignations et dimensions

B reitfelgenreifen; B ezeichnungen und Mape

des pneumatiques à base étro ite e t à base
large - S pécifications

Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy

1. Reifen

:

3 . 1 : 1 989)


BSI

BS AU 50

:

B S*AU *50: PTL

-

Part 1

:

: S UBS EC* 3 . LA

Subsection 3 . l a

:

91

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0 2 4 90 4 2 2

W r

a---

1991

National foreword

This S ubsection of this Part of BS AU 50, prepared under the direction of th e

rims -

:

Automobile S tandards Policy Committee, is identical with IS 0 4260-1
‘ Narrow and wide base off-road tyres and

dimensions’ as amended by IS 0 4260-1

:

:

Part 1

1 988/Amd 1

:

1 988

Tyre designation and

1 990 and published by

the International Organization for S tandaidization (ISO). S ubsection 3 . 2 of the
Part deals with tyre loads and inflation pressures. Other Parts of the standard
are:
Part 2 Wheels and rims;
Part 3 Valves,
This edition supersedes BS AU 60 : . Part 1

which is withdrawn.

:

Section 3

:

S ubsection 3 . 1

:

1 989,

Cross-references

The Technical Committee has reviewed the provisions of IS 0 4223 -1 and
IS 0 4260-3, to which reference

is made in th e text,

and has decided that they are

acceptable for use in conj unction with this standard.

:

:

NCEE. The full provisions of IS 0 4260-3

Part 2

Section 1

1 980.

:

1 987

will

be included in a fu tu re revision of

Bs AU

60

:

Compliance with a British Standard does not of itself confer immunity from
legal obligations.

Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy

%*


-

I

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B S AU 50 : Part 1 : Subsection 3 . l a

: 1 991 .

Contents

Page
National foreword

Ins ide fro n t page

Committees res pons ible

B ack page

S pecification

O

Intro duc tio n

1

1

S cope

2

Field of application

3

References

4

Definitions

5

Tyre des ignation

6

Tyredimens i o ns

7

Dual s pacing

8

Recommended

9

Method of meas urement of ty re dimens ions

ri m s

làb les
1

Type of s ervic e

2

Treaddes i g n

3

Tyre dimens ions for narro w b as e ty re s

3a

Tyre dimens ions for narro w bas e ty re s o n SDC rims

4

Tyre dimens ions fo r wide bas e ty re s

5

Dimensions fo r narro w bas e ty re s mo unted o n 15O

5a

Tyre dimens ions for 65 s eri es ty res

6

Recommended

ri m s

rim

c o nto urs

fo r diagonal and radial narro w bas e ty re s for

earth- moving s ervice, mobile c ranes , s hovels , mining cars , loaders
an d dozers

6a

Recommended

7

Recommended rims for diagonal an d radial w ide bas e ty re s fo r

r i m s for diagonal an d radial

tyres fo r road graders

8
8

earth- moving, mining an d logging s ervic e, mobile c ranes , s hovels ,
mining cars , loaders an d dozers
8

Recommended

ri rn s

fo r diagonal and radial narro w b as e tyres

mo unted o n 15O contours
9

Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy

Recommended

ri m s

9

fo r diagonal an d radial 65 s eries ty re s

9

9


-

k

6 x1

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0249044

I N TERNATI ON AL STAN DARD

b

I S 0 4250-1

1 988 ( E )

N a rro w an d wi d e base off-ro ad tyres an d ri ms Part 1 :

O

Tyre designation and dimensions

O

5

Introducti on

Tyre desi gnati on

IS0 4250 provi des techn i cal details o n th e desi gnati on and

The desi gnati on of tyres shall i nclu de th e details i n 5.1 and 5.2;

dimensions of off-road tyres and rims, as well as l oad rati ngs

it may i n clu de those in 5.3.

fo r these types of tyres.
Thi s I n tern ati onal Standard consists of three parts :

5. 1

Part 1 : Tyre designations and dimensions.

Tyres shall be designated by a two-part size marki ng (nomi nal
secti on wi d th - nomi n al ri m diameter code) except as noted i n

Part 2 : Loads and i nflati on pressures.

th e tables.

Part 3 : Rims.

Diagonal ply constru cti on

shall n o t be specially

marked. Radial ply constru cti on shall be i denti fi ed by the l etter
"R"

1

Tyre si ze a n d co n stru cti o n cod e

instead of th e dash,

before the ri m diameter i n th e size

desi gnati on . I n addition, th e word "radial"

Scope

may also appear on

th e tyre.

Thi s Dart of I S 0 4250 sets ou t designations and dimensions fo r
narrow and wi de base off-road t y i s and recommended ri ms.

2

5.2

i n d e x of t y r e s t r e n g t h

The term i s used t o i den ti fy a gi ven tyre wi th i ts maxi mu m

Field of appl i cati on

recommended l oad wh en used i n a specific type of service.

Thi s part of I S 0 4250 applies t o tyres pri mari ly i ntended for offroad machines.

3

5. 3

Other markings may be added, for example as i n 5.3.1 t o 5.3.4.

References

I S 0 4223-1 , Definitions

try - Part

1:

of some terms used in

the tyre indus-

Pneumatic tyres.

I S 0 4250-3, Narrow and wide base off-road tyres and rims

Part 3: Rims.

4

Defi ni tions

For defi n i ti ons of terms relati n g t o tyres, see I S 0 4223-1 .

Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy

O th er m arki n g s

-

5.3.1

P re fe rre d d i recti o n o f r o t a t i o n

The marki ng to i ndi cate the preferred di recti on of rotati on shall
be an arrow.

5. 3. 2

Tu bel ess t yre s

Tyres shall be marked "TUBELESS",

i f applicable.

1


I S 0 4250-1 : 1 988 ( E )

5.3.3

5.3.4

C o d e s ys t e m fo r t yre u sag e

Sem i -d ro p ce n t re ri m s

Tyres may be i den ti fi ed by thei r type of servi ce and tread design

"TG"

as i ndi cated i n tables 1 and 2 respectively.

centre (SDC) ri ms (see I S 0 4250-3).

Tabl e 1

-

shall be used to i d en ti fy tyres mou nted on semi -drop

Type of servi ce

Servi ce code

Type of service

C

Com pactor

E

Earth -m ovi n g (du m per an d

6

Tyre di mensi ons

Tyre di mensi ons shall be as l i sted :

tractor-scraper)
G

Grader

L
NOTE

-

Loader

The use o f these i den ti fi cati on codes i s at th e di screti on o f tl

i n di vi du al tyre m an u factu rer.

Tabl e 2

-

7

on SDC ri m s.

Table 4 :

Wide base tyres.

Table 5 :

N arrow base tyres on 1 5'

Table 5a :

65 series tyres.

ri m con tou rs.

Du al spaci ng

wi d th x 1 ,2.

G rooved

E-I

Ri b

E-2

Tracti on

E-3

Rock

E-4

Rock (deep tread)

E-7

Fl otati on

8

Recom m en d ed ri ms

Recommended ri ms are given as fo l l o ws :

G-I

Ri b

G-2

Tracti on

Table 6 :

G-3

Rock

Table 6a :

Di agonal and radi al tyres fo r road graders,

L-2

Tracti on

Table 7 :

Wide base tyres.

N arrow base tyres.

L-3

Rock

Table 8 :

N arro w base tyres on 1 5'

L-4

Rock (deep tread)

Table 9 :

Di agonal and rad i al 65 series tyres.

L-5

Rock (extra deep tread)

9

NOTES
Th e use o f these i den ti fi cati on codes i s at th e di screti on of th e

i n di vi du al tyre m an u factu rer.
Wh ere sm ooth treads are used i n th e "L" series,

den oted b y th e su ffi x "S"

2

base tyres

Recommended m i n i m u m dual spacing sh al l be design secti on

Sm o o th

c- 2

3

N arrow

Tread type

c- 1

2

N arro w base tyres.

Tread d esi g n

Code

1

Table 3 :

Table 3a :

of tyre

di mensi ons
Befóre measuring, tyres shall be mou n ted on a measuring ri m,

th i s sh ou l d be

( fo r example, L-5S) .

Code types 1 , 2 and 3 are designated as norm al tread depth .

Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy

M eth o d of m easu rem en t

co n to u r rims.

i n fl ated t o th e recommended pressure, and all owed t o stand fo r

a m i n i m u m of 24 h at n ormal room temperature, after wh i ch
th e i n fl ati on pressure shall be readjusted t o the ori gi nal value.


BS I

BS*AU*SO:PTL

: SU BSEC*3n LA 9 1

1 6 2 46 6 9 02490 46

T
I S 0 4250-1

Tabl e 3

Tyre size
designation
12.00 - 20, 21
12.00 - 24, 25
13.00 - 24, 25
14.00 - 20, 21
14.00 - 24, 25
16.00 - 20, 21
16.00 - 24, 25
18.00 - 24, 25
18.00 - 33
18.00 - 49
21.00 - 24, 25

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 - 33
30.00 - 51
33.00 - 51
36.00 - 51
37.00 - 57
40.00 - 57

I

I
I

1

I

Measuring ri m
width
Code
8.50
8.50

?O.OO

10.00
11.25
11.25
13.00
13.00
13.00
15.00
15.00
15.00
1 7.00
1 7.00
1 7.00
17.00
17.00

22*oo
1 9.50
22.00
22.00
24.00
26.00
27.00
29.00

-

Design new tyrel l
Section

Overall
wi dth
diameter31
315
1 1 46
315
1 247
351
I
1 301

II

375

I
I

1 988 ( E )

Tyre d i m en si o n s fo r n a r r o w base tyres

I

I

:

432
498

498
498
571
57 1
57 1
653
653
653
653
653

1

762
737
823
823
894
988
1 01 6
1 097

I

1 368
266

1 391
493
1 61 5

1 81 8
2 227
1 750
2004
2 360
1 875
1 975
2 127
2 331
2483
2242
2649
2 389
2846
2 997
3 1 65
3 370
3 526

II

Dimensions in millimetres
In-service2J
I
Maximum overall Maximum overall
width
diameters)
340
340

379
405
405
480
480
553
553
553
634
634
634
725
725
725
725
725
846
818
914
914
992
097
1118
1 21 8

I

I
I

1

?

1 342
1 413114

l1 561
m

1 693

2 306
1 839
2 093
2449
1 974
2 074
2 226
2 430
2 582
2354
2 761

II

I

I

4
3 315
3 524
3 692

1

1
I

I

2) In-service dimensions are the maximum dimensions for grown tyres in-service for use by machine manufacturers in designing for tyre clearances.
Max. overall width = design new tyre section width (S.W.) x (1 tolerance)
Tolerances: S.W. < 380 mm: 8 %
> 380mm: 11 %
Max. overall diameter = (design new tyre overall diameter - rim diameter) x (1 tolerance) rim diameter
Tolerances: S.W. < 380 mm: + 6 %
> 380mm: + 8 %
NOTE - See IS0 4250-3 for rim diameter values.
3) Figures are based on tyres with normal tread depth. The machine manufacturer should recognize that tyres with deep tread and corresponding
increased overall diameter may be used.

++

Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy

+

+

+

3

.


B S I

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I

I S 0 4250-1 : 1 988 ( E )

-

Ta b l e 3 a )

Tyre d i m en si o n s fo r n a r r o w base t yre s o n SDC ri m s
Dimensions i n m i l l i m etres

Measuring rim

Tyre si z e

wi d th

designation l J r * )

Design n ew tyre3)
Section

Code

I

wi d th

In-service51

OveraI I

Maxi mum overall

diameters)

wi dth

I

Maxi mu m overall
diameter41

1 0.00 - 24 TG

8, 00

283

1 1 51

306

1 2.00 - 24 TG

8. 00

31 2

1 226

337

1 263

1 3.00 - 24 TG

8. 00

333

1 278

360

1 31 8

1 1 84

1 4.00

-

24 TG

8.00

362

1 348

39 1

1 392

1 6.00

-

24 TG

1 0.00

427

1 459

474

1 527

1)

For radi al tyres, replace th e dash í

2)

"TG"

-1

i n th e size desi g n ati on wi th "R".

is a desi g n ati on t o be used t o i den ti fy tyres m ou n ted o n SDC ri m s.

3)

Design n ew tyre dimensions qu oted i n th e tables are used fo r tyre desi g n purposes on l y.

4)

Figures are based o n tyres wi th n orm al tread depth . Th e m ach i n e m anu factu rer sh ou l d recognize th at tyres wi th deep tread an d correspon d-

i n g increased overal l diameter may be used.
5)

I n -servi ce dimensions are th e m axi m u m di m en si on s fo r g ro wn tyres i n -servi ce fo r use by m ach i n e m an u factu rers i n desi g n i n g fo r tyre

clearances.
Max. overal l wi d th = [desi g n new tyre secti on wi d th (S. W. ) I x
Tol eran ces: S. W.

< 380 m m :

>

380m m:

+
+

<

>

380 m m :

380m m :

+
+

4

tol eran ce)

11 %

6 %
8 %

NOTE - See I S 0 4250-3 fo r ri m di am eter values.

Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy

+

8 %

Max. overall diameter = (desi g n n ew tyre overal l diameter
Tol eran ces: S.W.

(1

-

ri m di am eter) x

(1

+

tol eran ce)

+

ri m diameter

J


BS * AU* S O: P T L

B S I

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: SU B SE C *~ . ~ I A

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02490 48

3 =
I S O 4250-1

:

1 988

( E)

Tabl e 4 - Tyre d i m en si o n s fo r wi d e base tyres
Di m en si on s i n m i l l i m e tre s

Measuring ri m

Tyre size
designation

1 5. 5

-

1 7.5

20.5

Section

Code

wi dth
394

- 25

1 4.00

- 25

1 7. 00

I

I

I

In-service21

Overall

Maximum overall

Maximum overall

diameters)

wid th

diameters)

1 277

437

1 328

445

1 348

494

1 405

520

1 492

577

1

I

I

1

561

23.5

- 25

26.5

- 25

22.00

747

1 839

26.5

-

29

22. 00

747

1 940

29. 5

-

25

25.00

1 873

29.5

-

29

25.00

1 975

29.5

-

35

25. 00

2 1 27

33.25

-

29

33.25

-

35

1 9.50

27. 00

I

- 33

28.00

33.5

-

28.00

39

-

I

27.00

33.5

35

31

597

1 61 7

I

845
845

850

850

.O0

663

833
833
833

1 696

1 972
2 074
2 226

I

2 1 98

2242

938

2 242

944

2 354

2 395

944

2 507

2350

946

2389

1 o50

2509

37.5

- 33

32.00

952

2389

1 057

2 51 3

37.5

-

32.00

952

2 541

1

O57

2 665

37.5

- 51

2846

1 057

2 970

40.51 75

2)

25

wi d th

1 2.00

37.25

I)

Design n ew tyre’ )

39

- 3941

I

32.00

952

32.00

1 o29

I

2 581

I

1

1 42

2 708

Desi gn n e w tyre di m en si on s q u o te d i n the tabl es are u sed f o r tyre desi g n pu rposes on l y.

I n - se rvi ce di m en si on s are th e m axi m u m di m en si on s f o r g ro wn tyre s i n -servi ce f o r use by m ach i n e m an u factu re rs i n d e si g n i n g fo r tyre cl earan ces.

M ax.

ove ral l wi d t h

To l e ran ce s:

M ax.

=

S. W.

ove ral l di am eter

To l e ran ce s:

S.W.

d e si g n n e w tyre secti o n wi d t h

(S. W. )

< 380 m m :

+

8 %

>

3û û m m:

+

11

=

(d e si g n n e w tyre o ve ral l di am eter

<

380

mm:

+

x

(1

+

to l e ran ce )

%

- ri m d i am e te r)

x

(1 +

to l e ran ce )

+

ri m di am eter

6 %

> 3 8 0 m m : + 8 %

N OTE

3)

-

See

IS0

4250-3 f o r ri m di am eter values.

Fi g u res are based o n tyre s wi t h n o rm al tre ad d e pth .

Th e m ach i n e manufactu!er

sh o u l d recog n i ze th at tyre s wi t h

deep tre ad an d co rre spo n d i n g

i n creased overal l di am eter m ay b e used.

I

4)

Speci al size d e si g n ati o n .

Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy

5

-


!

BSI BS*AU*50: PTL
-

IS0

4260-1 1988 (E)

-

:SUBSEC*3.LA 9% I 3rb24bb9 02490

I:*

5

r.

:

e

Table 6 - Dlmenslons for narrow base tyres mounted on 1 6O rim contours

I

Tyre si z e
d eal g n ati on

width
Code

M eesu i l n g

66.6
33 69.6
- 59.5

39 69.6
Deslgn
30

-

36

-

11
21

853

diameter3)
2483

808
899

2846
2 997
3

166

o ve ral l

998

I

mllilmetres

I n aervi ca2i

width
726
818
097

2649

973

I

Maxlmum

Overall

737

tebles

Dimenslgns i n

tyrefl

wi d t h

new tyre dimensions quoted I n the

1 080

Menirnurn

overall

diarnetter3)
2682
2 761
2 970
3

1 33

3 31 6

are ueed for tyre design purposes only,

in-service dlmansions are the maximum dimensions for grown tyres in-setvlce for use by machine manufacturersI n deeigning for tyre clearances,
Max. overall wi dth

Tolerances:

= design new tyre sectlon wi dth

S.W.

<

>
Mex. overall diameter =

Tolerances:

380 mm:

8 46
380mm: 11

NOTE

-

See I C 0

K3.W.)

+

II

t

tolerance)

%

(design new tyre overall diameter

<

4250-3 for

x

+

SaW. 380mm: + 8
380mm: f 8 %
>

31

Design n e w
Secti on

23.60
27.00
27.00

-

I

rim

-

rim diameter)

x (1

f

tolerance1

+

rim diameter

%

rlm

diameter vsIueB.

uwd.

Figures are based on tyrea wi th normal tread depth. The machine manufecturershould recognize that tyres wi th deep tread and corresponding

Increased overall diameter may be

6
Copyright by the British Standards Institution
Fri Feb 11 10:29:30 2000

Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy


,.

BS I

c

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: S UBS EC* 3 . 1 A 91

162 4 669

0249050

1

i

I S 0 4250-1 : 1 988 ( E )

Tabl e 5 a ) - Tyre d i m en s i o n s fo r 65 seri es t yre s
Di m en si on s i n m i l l i m etres
M e as u ri n g r i m

Desi g n n e w tyre * )

I n - s e rvi c e 4 i

Ty re s i z e
d es i g n ati o n 1 )

wi d th

Secti o n

O ve ral l

M a x i m u m o ve ra l l

M a x i m u m o ve ra l l

Code

wi d th

d i am e te r3 )

wi d th

d i am e te rs )

25/65 - 25

20.00

635

1 486

301 65 - 25

24.00

762

1 656

705

1 554

29

24.00

762

1 758

- 33

28.00

889

846
846

2 029

987

401 65 - 39

32.00

1 01 6

2 352

1 1 28

2 461

45

36.00

1 1 43

2 675

1 269

2 798

501 65 - 51

40.00

1 270

2 997

1 41 0

3 1 33

301 65
35/65

4 5 /6 5

-

-

Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy

1 738
1 840
2 1 24

7


IS0

4250-1

1 988 ( E )

T a b l e 6 i n d i c a t e s re c o m m e n d e d r i m s f o r n a r r o w bas e tyre s .

Ta b l e

6a)

-

Recom m en d ed
t yres

Ta b l e

6

-

n arro w

Recom m en d ed

base t yre s

cran es,

sh ovel s,

fo r

ri m s f o r

mining

cars,

8.5,

1 2.00 - 21

8. 50/1 . 3

1 2.00 - 24

8.5, 8.50V,

1 2.00 - 25

8, 50/1 . 3

1 3.00 - 24

1 o.oow

1 3.00 - 25

1 0.00/1 .5

-

8.50V,

1 0. 00/1 . 5

1 4.00 - 24

1 0.00w

-

1 6.00 - 20

1 1 .25/2.0

'I 1 . 25í2. 0

1 6.00 - 24

1 1 , 25/2. 0

1 6.00 - 25

1 1 . 25/2. 0

1 8.00 - 24

1 3.001 2.5

1 8.00 - 25

1 3. 00/2. 5

1 8.00 - 33

1 3. 00/2. 5

1 8.00 - 49

1 3. 00/2. 75

21 .00 - 24

1 5.00/3.0

21 .00 - 25

1 5. 00/3. 0

21 .00 - 35

1 5. 00/3. 0

21 .00 - 49

1 5. 00/3. 0

24.00 - 25

1 7. 00/3. 5

24.00 - 29

1 7. 00/3. 5

24.00 - 35

1 7.00/3.5

24.00 - 43

1 7. 00/3. 5

24.00 - 49

1 7. 00/3. 5

27.00 - 33

22. 00í4. 0

27.00 - 49

1 9. 50/4. 0

-

33.00

-

36.00
37.00

24. 00/5. 0

-

51

26.00/5.0

-

57

27. 00/6. 0

40.00 - 57

29.00/6.0

8.5V5O

The tyre and ri rn /wh eel m an u factu rers sh ou l d be con su l ted

fo r con fi rmati on

of

th e su i tabi l i ty

i n ten ded service.

8
Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy

of

d i ag on al

an d

I

Reco m m en d ed

ra d i a l

ri m s4)

1 0.00 - 24 TG

8 . 0 0 TG

SDC

1 2.00 - 24 TG

8 . 0 0 TG

SDC

-

8. 0 0 TG

SDC

1 3.00

8.5V5O

22. 00/4. 5

51

d esi g n ati o n 2 ) 83 )

ri m s fo r

ro a d g ra d e rs ' )

ri m s

22. 00/4. 5

33

30.00 - 51

Tyre si ze

d o zers

1 0. 00/1 . 5

25

1 6.00 - 21

30.00

ra d i a l

m obi l e

1o.oow

20

1 4.00 - 21

1 4.00

-

l o a d e rs a n d

1 2.00 - 20

1 4.00

an d

servi ce,

Reco m m en d ed

Tyre si ze d e s i g n ati o n

NOTE

d i ag on al

eart h - m o vi n g

fo r

th e tyre/wh eel assembly fo r th e

1)

24 TG

1 4.00

-

24 TG

1 6.00

-

24 TG

I

1 O.OOVA

SDC

8 . 0 0 TG

SDC

1 O.OOVA

SDC

1 0. 00VA

SDC

Th e tyre an d ri m /wh eel m an u factu rer sh ou l d be con su l ted fo r

con fi rm ati on o f th e su i tabi l i ty of th e tyre/wh eel assembly fo r th e
i n tended service or fo r th e use o f al tern ati ve ri m s.
2)
wi th
3)

For radial tyres,

"R".

"TG"

is

replace th e dash í

See

1 i n th e size desi g n ati on

a desi g n ati on t o be used t o i d e n ti fy tyres m ou n ted o n

SDC rims.
4)

-

I S0

4250-3 fo r ri m con tou rs.

I S 0 4250-1 : 1 988 ( E )

O
T a b l e 7 i n d i c a t e s re c o m m e n d e d r i m s f o r w i d e bas e tyre s .

Tab l e 8 i n d i cate s re co m m e n d e d

ri m s f o r

n a r r o w base t y re s

m o u n t e d o n 1 5 O c o n t o u rs .

Tabl e 7 - R e co m m e n d e d ri m s for d i ag on al a n d rad i al
w i d e bas e tyres for earth -m ovi n g ,

Tabl e 8

m i n i n g an d l og g i n g

-

R e co m m e n d e d ri m s for d i ag on al a n d rad i ai

n a r ro w base tyres m o u n t e d o n 1 5 O co n to u rs

servi ce, m o bi l e cran es, sh ovel s, m i n i n g cars, l oad ers
a n d d o zers

Tyre si ze d e s i g n ati o n

-

R eco m m en d ed ri m s

27 - 56.5

20.0

30 - 56.5

22.0

12.0011.3

15.5 - 25

17.5

Tyre si ze d e s i g n ati o n
R eco m m en d ed ri m s

12.0011.3 SDC
14. 0011.5

25

14. 0011.3 SDC

17.0011.711

23.5 - 25
25

22.0013.0

26.5

-

29

22.0013.0

29.5 - 25

25.0013.5

29.5 - 29

25.0013.5

29.5 - 35

25.0013.5

33.25 - 29

27.0013.5

33.25 - 35

27.0013.5

33

28.0014.0

33. 5 - 39

28.0014.0

37.25 - 35

31.0014.0

-

32.0014.5

37. 5

I

33

37. 5 - 39

32.0014.5

37. 5 - 51

32. 00/4. 5

40.5175 - 392'

I

1)

M axi m u m 16 P. R. or on e star ( * l .

2)

Special size desi g n ati on .

NOTE - The tyre and ri m l wh e e l m an u factu rers sh ou l d be con su l ted

32. 0014.5

Tabl e 9

I

NOTE - The tyre an d ri m l wh e e l m an u factu rers sh ou l d be con su l ted

Publication(s) referred to
national foreword.

Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy

R e co m m e n d e d ri m s fo r d i ag on al a n d rad i ai 65

Tyre s i z e d e s i g n a t i o n

R e co m m e n d e d ri m s

1 ). 2)

19.5012.0

25/65 - 25

I

.

i n ten ded service.

-

seri es tyres

fo r con fi rmati on of th e su i tabi l i ty of th e tyrel wh eel assembly fo r th e

See

27.0

i n ten ded service.

-

-

27.0

59. 5

-

fo r con fi rmati on o f th e su i tabi l i ty of th e tyrel wh eel assembly fo r th e

19.5012.5

26.5

33. 5

36 - 59.5

17.0012.0

20.5 - 25

I

23.5

39

~

-

59.5

33

1)

20. 0012.0

30165 - 25

1

24. 0013.0

30165 - 29

1

24. 0013.0

35/65 - 33

1

28. 00i3. 5

40165

-

39

1

32.0014.0

45/65

-

45

36.0014.5

50165 - 51

40.0014.5

The tyre an d ri m l wh e e l m an u factu rer sh ou l d be con su l ted fo r

con fi rm ati on o f th e su i tabi l i ty of th e tyre l wh e e l assembly fo r th e
i n tended service or fo r th e use of al tern ati ve rims.
2)

For radi al tyres, replace th e dash í -

wi th "R".

i n th e size desi g n ati on


BSAU50:
RW t1 :
Subsection 3 . h :
1991

Tso am 1 : 1988

Committees responsible for this
British Standard

The preparation of this B ritish S tandard was entius ted by t h e Automobile
S tandards Policy Committee (AUE/-) to lkchnical Committee AUE/4, upon
which th e following bodies were represented:

Agricultural Engineers’ Association
Automobile Association
B ritish Industrial Truck Association
B ritish Pressure Gauge Manufacturers’ Association
B ritish Rubber Manufacturers’ Association
Bus and Coach Council
Department of Transport
Freight Transport Association

Ins titute of Road Transport Engineers (Inc)
Motor Cycle Industry’ s Association of Great B ritain Ltd.
Motor Industry Research Association
National Tyre Distributors’ Association
Retread Manufacturers’ Association
Road Haulage Association Ltd.
Royal Automobile Club
S ociety of Motor Manufacturers and Traders Ltd.

This B ritish S tandard,

having

been prepared under t h e
direction of th e Automobile

Amendments issued since publication

S tandards Poiicy Committee,

was published under t h e

authority of t h e S tandards B oard

AmdeNo *

I

Date

I

ll?xt
affected

and comes into effect o n
30 August 1 991
O BSI 1 991

I

The foliowing BSI references

l

relate t o the work on this
standard:
Committee reference AUE14
Drafts for comment 861 771 83 DC
and 891 78926 DC
ISBN

91 08-

O 680 19920 7
5-

0.86k-

B

Reprodu ced by I H S u n d er l i cen se wi th BSI - U n con trol l ed Copy

B SI ,

2 Park Street, London W1A

PW-2D-14

2BS

BSI, Linford Wood, Milton Keynes MK14 6LE

AUE14