Bsi bs au 050 4 5 2 1996 (1999) iso 3739 3 1995

BRITISH STANDARD AUTOMOBILE SERIES

BS AU
50-4.5 .2:1 996
ISO 3739-3:
1 995

Tyres and wheels —
Part 4: Rim profiles and dimensions —
Section 5 : Industrial vehicle rims —
Subsection 5.2 Specification for rim
profiles and dimensions for metric
series pneumatic tyres and solid tyres
for pneumatic tyre rims

IC S 5 3 . 0 60

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BS AU 50-4.5 .2:1 996

Committees responsible for this
British Standard

The preparation of this British Standard was entrusted to Technical
Committee AUE/4, Tyres and wheels for 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
Department of Transport
Freight Transport Association
Institute of Road Transport Engineers (Inc)
Motor Cycle Industry’s Association of Great Britain Ltd.
Motor Industry Research Association
National Tyre Distributors’ Association
Retread Manufacturers’ Association
Road Haulage Association Ltd.
Society of Motor Manufacturers and Traders Ltd.

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
1 5 July 1 996
© BSI 07- 1 999

The following BSI references
relate to the work on this
standard:
Committee reference AUE/4
Draft for comment 92/83002 DC

ISBN 0 5 80 25 906 4

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Amendments issued since publication

Amd. No.

Date

Comments


BS AU 50-4.5 .2:1 996

Contents

Page
Committees responsible

Inside front cover

National foreword

ii

1

Scope

1

2

Normative reference

1

3

Definitions

1

4

Designation and marking

1

5

Rim profiles

1

Annex A (normative) Existing rims

2

Figure A. 1 — Tapered divided rims

2

Figure A. 2 — 5 ° drop- centre rims

3

Figure A. 3 — 5 ° tapered rim for codes 4. 00 E, 5. 00 S; 5. 00 F; 6. 50 F
and 8. 00 G

4

Figure A. 4 — 5 ° tapered rims for codes 5. 0; 6. 5; B 6. 5; 8. 0 and B 8. 0

5

Table 1 — Specified rim diameter

1

Table A. 1 — Index of existing rims

2

Table A. 2 — Tapered divided rims — Rim contours

2

Table A. 3 — Tapered divided rims — Size range of existing rims

3

Table A. 4 — 5 ° drop- centre rims — Rim contours

3

Table A. 5 — 5 ° drop- centre rims — Size range of existing rims

3

Table A. 6 — 5 ° tapered rims for codes 4. 00 E, 5. 00 S; 5. 00 F; 6. 50 F
and 8. 00 G — Rim contours

4

Table A. 7 — 5 ° tapered rims for codes 4. 00 E; 5. 00 S; 5. 00 F; 6. 50 F
and 8. 00 G — Size range of existing rims

4

Table A. 8 — 5 ° tapered rims for codes 5. 0; 6. 5; B 6. 5; 8. 0 and B 8. 0 —
Rim contours

5

Table A. 9 — 5 ° tapered rims for codes 5. 0; 6. 5; B 6. 5; 8. 0 and B 8. 0 —
Size range of existing rims
List of references

© BSI 07- 1 999

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5
Inside back cover

i


BS AU 50-4.5 .2:1 996

National foreword

This Subsection of Part 4 of BS AU 50 has been prepared by Technical Committee
AUE/4 and is identical with ISO 3739- 3: 1 995

Rims ,

Industrial tyres and rims — Part 3:

published by the International Organization for Standardization (ISO). It

covers rim profiles for use with pneumatic tyres and solid tyres with the
equivalent profile. The corresponding tyre details are dealt with in
Subsections 5. 2, 5. 3 and 5. 4 (of BS AU 50- 1 ). Tyre and rim details for cyclindrical
and conical base rubber solid tyres (metric series) are dealt with in Subsection 5. 6
of BS AU 50- 1 .
Other Parts of this standard are as follows:
—

Part 1: Tyres ;

—

Part 2: Wheels and rims ;

—

Part 3: Valves .

Warning. The wheel manufacturer should be consulted to determine whether the
rim and wheel is of sufficient strength for the intended service. In particular, care
has to be taken to ensure that the wheel will withstand the maximum pressure
of any tyre that can be fitted in accordance with BS AU 50- 1 . 5. 2: 1 994 or
BS AU 50- 1 . 5. 3: 1 994. This pressure could exceed 1 000 kPa (1 0 bar) for both
diagonal and radial tyres.
Cross-references

The Technical Committee has reviewed the provisions of ISO 391 1 : 1 977 to which
normative reference is made in the text, and has decided that they are acceptable
for use in conj unction 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.

ii
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© BSI 07- 1 999


BS AU 5 0-4.5.2:1 996

1 Scope

This part of ISO 3739 specifies the main
requirements, including size designation and
marking, of 5 ° tapered and flat base rims with
diameters not exceeding rim diameter code 15 for
pneumatic tyres, and for solid tyres for pneumatic
tyre rims, primarily intended for industrial vehicles
for use on prepared surfaces.
ISO 3739-1 gives the designation, dimensions and
marking, and ISO 3739-2 the load ratings of
pneumatic tyres (metric series). ISO 10499 covers
the designation, dimensions and marking of rubber
solid tyres (metric series) for pneumatic tyre rims.
Rim dimensions are specified for size and contour
only. The tyre and the wheel/rim manufacturers
have to be consulted for confirmation of the
suitability of the tyre/rim combinations,
particularly with regard to rim profile and wheel

strength.

5 Rim profiles
5 .1 Existing rims

Profiles of existing rims shall be as given in
Annex A.
The flange widths include edge radius. The portion
of the flange beyond the minimum width shall be
lower than the highest point of the flange.
5 .2 Additional rims

As far as possible, existing rims (see 5.1 ) should be
used for the metric series of tyres; only if absolutely
necessary should new profiles be considered.
If additional rims are designed, the requirements
in 5 .2.1 and the recommendation in 5 .2.2 apply.
5 .2.1 Requirements
The new rim width code shall be chosen from the
following range:
2.50; 3.25; 4.00; 5.00; 6.50; 8.00; 10.00
Any rim profile shall be independent from the rim
2 Normative reference
diameter, i.e. no change of profile is related to the
diameter.
The following standard contains provisions which,
through reference in this text, constitute provisions The rim shall have a 5° tapered bead seat.
of this part of ISO 3739. At the time of publication,
specified rim diameter shall be as given in
the edition indicated was valid. All standards are The

Table
1
subject to revision, and parties to agreements based
5 .2.2 Recommendation
on this part of ISO 3739 are encouraged to
investigate the possibility of applying the most
The flange height should be in the range 13 %
recent edition of the standard indicated below.
to 20 % of the tyre section height.
Members of IEC and ISO maintain registers of
Table 1 — Specified rim diameter
currently valid International Standards.
a
ISO 3911:1977,
Specified rim diameter

Wheels / rim s — Nom enclature,

des ignation,

m arking,

For the purposes of this part of ISO 3739, the
definitions given in ISO 3911 apply.
4 Designation and marking

Rim designation and marking shall be in accordance
with ISO 3911:1977, clauses 3 and 4 respectively.

© BSI 07-1999

D

code

and units o f m easurem ent.

3 Definitions

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Nominal rim diameter

4
6
8
9
10
12
15

100,8
151,6
202,4
227,8
253,2
308,8
387,4

± 0,4

mm

a Tolerance is for tyre design purpose only. The rim

measurement is made by a circumference-measuring tape
related to a mandrel.

1


BS AU 50-4.5.2:1 996

Annex A (normative)
Existing rims
This annex gives detailed characteristics of existing rim profiles for which an index is given in Table A. 1 .
Table A. 3, Table A. 5, Table A. 7 and Table A. 9 give existing combinations of dimension and nominal rim

×

diameter code, as indicated by a cross ( ) . The specified rim diameter,

D, may be found in Table 1 .

Table A.1 — Index of existing rims
Rim profile details are indicated in
Rim width code

2. 50

3. 25

4. 0

Existing rims

4 – 2. 50 C

Figure A. 1 and Figure A. 2

Table A. 2, Table A. 3, Table A. 4 and Table A. 5

Figure A. 1 and Figure A. 2

Table A. 2, Table A. 3, Table A. 4 and Table A. 5

4 – 3. 25 I

Figure A. 1

Table A. 2 and Table A. 3

6 – 3. 25 I

Figure A. 1

Table A. 2 and Table A. 3

8 – 3. 25 I

Figure A. 1

Table A. 2 and Table A. 3

Figure A. 1 , Figure A. 2

Table A. 2, Table A. 3, Table A. 4, Table A. 5,

and Figure A. 3

Table A. 6 and Table A. 7

1 0 – 5. 00 F

Figure A. 1 and Figure A. 3 Table A. 2, Table A. 3, Table A. 6 and Table A. 7

1 2 – 5. 00 S

Figure A. 1 and Figure A. 3 Table A. 2, Table A. 3, Table A. 6 and Table A. 7

1 5 – 5. 0
6. 5

a

a

Figure A. 4

Table A. 8 and Table A. 9

1 0 – 6. 50 F

Figure A. 1 and Figure A. 3 Table A. 2, Table A. 3, Table A. 6 and Table A. 7

1 5 – B 6. 5

Figure A. 4

Table A. 8 and Table A. 9

Figure A. 4

Table A. 8 and Table A. 9

1 5 – 6. 5
8. 0

tables

8 – 2. 50 C

9 – 4. 00 E

5. 0

figures

a

1 2 – 8. 00 G

Figure A. 3

Table A. 6 and Table A. 7

1 5 – 8. 0

Figure A. 4

Table A. 8 and Table A. 9

1 5 – B 8. 0

Figure A. 4

Table A. 8 and Table A. 9

Rims with identical designation but different dimensions exist.

Figure A.1 — Tapered divided rims
Table A.2 — Tapered divided rims — Rim contours

A

Rim width
code

G

± 2

B

C

min.

P

R1

min.

2. 50 C

63, 5

1 6, 5 ± 1

11

11,5

12

7, 5

3. 25 I

82, 5

16 ± 1

10

—

—

—

R2

Dimensions in millimetres

R

3
max.

R

8
max.

12

3, 5

5

9

4, 5

8

4. 00 E

1 01 , 5

20 ± 1

1 2, 5

1 3, 5

25

8, 5

14

6, 5

10

5. 00 S

1 27

31 , 5 ± 1 , 5

19

—

43

—

1 8, 5

8

16

5. 00 F

1 27

22, 5 ± 1

13

1 4, 5

23, 5

9, 5

1 5, 5

6, 5

12

6. 50 F

1 65

22, 5 ± 1

13

1 4, 5

—

9, 5

1 5, 5

6, 5

12

2
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© BSI 07- 1 999


BS AU 5 0-4.5.2:1 996

Table A.3 — Tapered divided rims — Size range of existing rims
Rim width code

Nominal rim diameter code
4

2. 50 C

×

3. 25 I

×

6

8

9

10

12

×

×

×
×

4. 0 0 E

×

5. 00 S

5. 00 F

×

6. 5 0 F

×

Figure A.2 — 5 ° drop-centre rims
Table A.4 — 5 ° drop centre rims — Rim contours
D imens ions in millimetres

Rim width
code
2. 50 C

4. 0 0 E

A

G

B

± 2

± 1

min.

63 , 5

1 01 , 5

C

P

H

L

M

min.

ref.

ref.

max.

R

1

R

R

2

3

max.

R

R

4

10

!
min.

m in.

1 6, 5

11

11,5

12

1 3, 5

1 2, 5

2 5, 5

7, 5

12

3, 5

6

2 8, 5

13

°

20

1 2, 5

1 3, 5

18

19

19

35

8, 5

14

6, 5

6

38

10

°

Table A.5 — 5 ° drop-centre rims — Size range of existing rims
Nominal rim diameter code
Rim width code
4

2. 50 C

4. 0 0 E

© BS I 0 7- 1 99 9
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×

8

9

×
×

3


BS AU 50-4.5 .2:1 996

NO TE

Flange and b ead s eat s hall b e removab le on one s ide of the rim.

Figure A.3 — 5 ° tapered rim for codes 4.00 E; 5 .00 S; 5 .00 F; 6.5 0 F and 8.00 G
Table A.6 — 5 ° tapered rims for codes 4.00 E; 5.00 S; 5.00 F; 6.5 0 F and 8.00 G —
Rim contours
D imens ions in millimetres

A

Rim width

G

code

B

P

min.

min.

C

R

R

1

R

2

3

max.

4. 0 0 E

1 01 , 5 ± 2

20 ± 1

1 2, 5

25

1 3, 5

8, 5

14

6, 5

5. 00 S

1 27 ± 2, 5

31 , 5 ± 1 , 5

19

43

—

—

1 8, 5

8

5. 00 F

1 27 ± 2

22, 5 ± 1

13

2 3, 5

1 4, 5

9, 5

1 5, 5

6, 5

6. 5 0 F

1 65 ± 2

22, 5 ± 1

13

34

1 4, 5

9, 5

1 5, 5

6, 5

8. 00 G

2 03 ± 3

28 ± 1

1 4, 5

40, 5

—

—

14

7, 5

Table A.7 — 5 ° tapered rims for codes 4.00 E; 5 .00 S; 5 .00 F; 6.5 0 F and 8.00 G — Size range of
existing rims
Nominal rim diameter code
Rim width code
9
4. 0 0 E

10

×
×

5. 00 S

5. 00 F

×

6. 5 0 F

×
a

8. 00 G

a

This comb ination exis ts , with a s p ecified rim diam eter,

4
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12

D

, of 3 04 mm ± 0, 4 mm b ut is not for new rim des igns .

© BS I 0 7 - 1 99 9


BS AU 5 0-4.5.2:1 996

NO TE

Flange and b ead s eat s hall b e removab le on one s ide of the rim.

Figure A.4 — 5 ° tapered rims for codes 5 .0; 6.5 ; B 6.5 ; 8.0 and B 8.0
Table A.8 — 5 ° tapered rims for codes 5.0; 6.5; B 6.5; 8.0 and B 8.0 —
Rim contours
D imens ions in millimetres

Rim width code

5. 0

6. 5

R

P

Y

a

2

min.

ref.

± 2, 5

1 27

28

1 6, 5

14

3

36

1 65

35, 5

20

18

3

36

1 65

38

21 , 5

19

2, 5

27

2 03

43

24

21 , 5

3

36

2 03

43

24

21 , 5

2, 5

27

B 8. 0

Y

B
m in.

b

8. 0

b

G

± 1,5

b

B 6. 5

a

A
± 3, 5

= D is tance of s p ecified rim diameter p rofile from nominal diameter p rofile.

Rims with the s ame des ignation b ut different dimens ions exis t.

Table A.9 — 5 ° tapered rims for codes 5.0; 6.5; B 6.5; 8.0 and B 8.0 —
Size range of existing rims
Nominal rim diameter code

Rim width code

15

×

5. 0

×

6. 5

a

B 6. 5

×

8. 0

a

B 8. 0

a

This comb ination exis ts , with a s p ecified rim diameter,

© BS I 0 7- 1 99 9
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D

, of 3 85 , 8 m m ± 0, 4 mm b ut is not for new rim des igns .

5


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BS AU 5 0-4.5.2:1 996

List of references

See national foreword.

© BSI 07- 1 999
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BS AU
5 0-4.5 .2:1 996
ISO 3739-3:

BSI — British Standards Institution

1 995
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