Bsi bs au 050 1 0d 1998

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BRITIS H STAN D AR D AUTO MO B ILE SE RIE S

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B S A U 50 :
P art 1 :

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S e ctio n 0d :

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Tyre s and whe e ls

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P art 1 . Tyre s

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S e ction 0d. Ge ne ral

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IC S 43 . 0 40 . 5 0 ;

83. 1 60. 1 0

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NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW

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1 998


Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 1 : 20 G M T+00: 00 2006, U n con trol l ed Copy, (c) BSI

BS AU 50 : Part 1 : Section 0d : 1998

Committees responsible for this
British Standard
The preparation of this British Standard was entrusted to Technical C ommittee
AUE /4, Wheels and tyres for motor vehicles, upon which the following bodies were
represented:

Agricultural E ngineers' Association
Automobile Association
British Industrial Truck Association
British Pressure Gauge Manufacturers' Association
British Rubber Manufacturers' Association Ltd.
C onfederation of Passenger Transport
Department of Transport
Freight Transport Association
Institute of Road Transport E ngineers
Motor C ycle Industry Association Ltd.

Motor Industry Research Association
National Tyre Distributors' Association
Retread Manufacturers' Association
Road Haulage Association Ltd.
Society of Motor Manufacturers and Traders Ltd.

This B ritis h Standard,

having

Amendments issued since publication

b e e n p re p are d unde r the
dire ctio n o f the E ngine e ring
Se cto r B o ard,

was p ub lishe d

unde r the autho rity o f the
Standards B o ard and co me s into
e ffe c t o n 1 5 Ap ril 1 9 9 8

©

B SI 1 9 9 8

The fo llo wing B SI re fe re nce s
re late to the wo rk o n this
Standard:
C o mmitte e re fe re nce AVE /4

D raft fo r c o mme nt 9 7/705 9 74 D C

ISBN 0 580 28604 5

Amd. No.

Date

Text affected


Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 1 : 20 G M T+00: 00 2006, U n con trol l ed Copy, (c) BSI

BS AU 50 : Part 1 : Section 0d : 1998

Contents
Page
Committees responsible
Foreword

1
2
3
4
5
6
7
8

ii

Scope

1

Normative references

1

Definitions

1

Tyre measurement

1

Rim identification

1

Inflation pressures

1

Anti-static properties

2

Tyre markings

Bibliography

Figure
1
Typical

©

BSI 1 998

Inside front cover

2
3

tyre section

2

i


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B S A U 50 : Part 1 : S e ction 0d : 1 998

F o re wo rd

This section of BS AU 50 : Part 1 has been prepared by Technical Committee AUE /4. It

supersedes BS AU 50 : Part 1 : Section 0c : 1 977 which is withdrawn. This section
provides information for use in conj unction with other sections in Part 1 . The other
sections are:

Section 1 :

Car tyres

Section 2 :

Co mmercial vehicle tyres

Section 3:

Off- the- ro ad tyres

Section 4:

Agricultural tracto r and machine tyres

Section 5:

Industrial vehicle tyres

Section 6:

Mo to r cycle tyres

Section 7:

Mo ped tyres

Section 8:

Co de o f practice fo r the sto rage o f tyres,

inner tub es and flaps

This new edition incorporates amendment 1 to BS AU 50 : Part 1 : Section 0b : 1 973
and updates the references, definitions and marking requirements. It does not,
however, constitute a full revision of the standard.

Part 1 of this standard is concerned with tyres. The other parts are:

Part 2 :

Wheels and rims

Part 3:

Valves

Part 4:

Rim pro files and dimensio ns

Certain components specified in this standard may be subj ect to patents.
Manufacturers complying with this standard should be satisfied that they are not
infringing any patents.

N O TE .

Info rmatio n o n SI units is p ro vide d in B S 555 5 and B S 3 50 .

C o mp lianc e wi t h a B ritis h S tandard doe s not o f its e lf c o nfe r im m un it y
fro m le gal o b ligatio ns.

S um m ary o f p age s

This document comprises a front cover, an inside front cover, pages i and ii,
pages 1 to 3 and a back cover.

ii

©

B SI 1 9 9 8


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B S A U 5 0 : P art 1 : S e ction 0d : 1 998

3 .5 mo to r c yc le /m o p e d tyre

1 S cop e
Part 1 o f this
with

lo ads

with

the

B ritis h

and

ass o c iate d

B S AU 5 0 -4,

and

Re quire me nts
Ap p ro p riate

Standard

inflatio n

whe e l

on

the

rim

numb e rs

tyre

fo r use

s p e c ifie d

o f ve hic le s

are

als o

are

sp e c ifie d

Pne umatic

siz e s ,

sc he dule s ,

c o nto urs

c las s e s

fo r markings

valve

sp e c ifie s

p re s s ure

in

s p e c ifie d.

inc lude d.

c ycle s
N O TE .
us e

tyre ,

p rimarily de s igne d

fo r us e

on

mo to r

and/o r mo p e ds.

Ve hic le s

with this

with thre e

typ e

o r fo ur whe e ls

may b e

de signe d

fo r

o f tyre .

3 .6 e arthm o ve r tyre

in
Pne umatic

tyre ,

p rimarily de s igne d

fo r us e

on

B S AU 5 0 -3 .

e arth-mo ving
N O TE
b asis

1.

Tyre

o f the

data in

typ e

this

o f tyre ,

caravans

using

N O TE

Sp e e d limits

B ritis h

no t

c ar tyre s ,

its

S tandard

are

ap p lic atio n.

re fe re nc e

s ho uld

c o mp ile d

on

Fo r e xamp le ,

be

made

to

the

3 .7 industrial tyre

fo r

Se ctio n 1 .

S o lid,

to

the

2.

markings

quo te d

ac co unt any le gal s p e e d

N O TE
o ne

3.

Tyre s

de sign to

have

in

this

and cap ab ilitie s

o f o ne

suit

limits

s ize

vario us

B ritis h

o f the

ap p lic ab le

de s ignatio n
s e rvice

diffe re nt sp e e d c ap ab ilitie s ,

S tandard

tyre s
to

may

and
the

be

indic ate d

are

no t

in

The s e

on

the

cushio n/re s ilie nt

into

de signe d

mo re

than

de s igns
tyre

re fe re nc e s
c o nstitute

which,

re fe re nc e s ,

re vis io ns

o f,

Fo r undate d
p ub licatio n

s ide wall

re fe re nc e s ,

re fe rre d

B S 3 5 5 8: 1 9 80

B S AU 5 0 -3

B S AU 5 0 -4

se c tio n

co ntain
in

to

p ub lic atio ns

the

this

do

late s t e ditio n

to ,

no t

Fo r

Pne umatic

fo llo wing
in

or

p atte rn

Tre ad

p atte rn

Tre ad

B ritish

ap p ly,

S tandard,

mate rials ,

p rimarily de s igne d

fo r use

on

made -up

de s igne d

fo r us e

o ff-the -ro ad.

p atte rn

de s igne d

fo r us e

on

and

o ff-the -ro ad.

3.1 2 s e rvic e de s c rip tio n
D e finitio n
inde x

N O TE .
rating

o f a tyre ' s

(o r indic e s )

S o me

(PR)

tyre s

c ap ab ilitie s ,

and

sp e e d

may indic ate

o r s tar rating

(o ne

b y me ans

o f a lo ad

symb o l.

lo ad

c arrying

o r mo re

stars ) .

c ap ac ity b y p ly
Se e ,

fo r e xamp le ,

B S AU 50 -1 -3 . 2 .

3.1 3 wid e tyre
Tyre

usually fitte d

single

to

re p lac e

twin

as s e mb lie s ,

in

fo rmatio n.

to ge the r with

tho se

Tyre

me asure me nts

with

the

shall

be

made

in

ac c o rdanc e

give n
re le vant se ctio ns

o f Part 1 o f this

standard.

figure 1 ) .

shall

s hap e d

mo untab le

on

the

3 .1 p ne um atic tyre

e lastic

fo r us e

mac hine s .

3.1 0 c ro s s - c o untry tre ad p atte rn

Whe re

fab ric ;

and

4 Tyre m e as ure m e nt

als o

Annular to ro idal

p rimarily de s igne d

ve hic le s

3.1 1 dual p urp o s e tre ad p atte rn

o f the

ap p lie s.

o f this

de finitio ns

B S 3 5 5 8 (s e e

and
on

inflatab le

re info rc e d
a rim

and

e nve lo p e ,

with

wire

of

and/o r

co ns truc te d

to

the

no

be

p ro c e dure

o b taine d

inflate d

and

tyre ,

dividing

if sp e c ifie d,

b y me as uring
mo unte d

on

the

the

the

o ve rall

diame te r

c ircumfe re nc e

ap p ro p riate

of

rim,

b y 3 . 1 41 6.

re tain

air.

5 R im ide ntific atio n

3 .2 c ar tyre
Pne umatic
cars

tyre ,

ap p ly.

Specification for electrical
resistance of conducting and
antistatic products made from
flexible polymeric material
Glossary of rubber terms
Tyres and wheels Ð Part 3: Valves
Tyres and wheels Ð Part 4: Rim
profiles and dimensions

p urp o se s

and

te xt,

3 D e finitio ns
Fo r the

p rimarily

ro ads .

o f B S AU 5 0 .

s ub s e que nt ame ndme nts

any o f the s e

B S 2 0 5 0: 1 9 78

re fe re nc e

o f this

tyre ,

transp o rt

3 .9 h i g h way tre ad p atte rn

do c ume nts

thro ugh

p ro vis io ns

wo rks

3 .8 agric ultural tyre

Tre ad
no rmative

inte rnal

e quip me nt.

agric ultural

fo llo wing

on

may

2 No rmative re fe re nc e s

date d

fo r us e

indus trial

marking.

The

o r p ne umatic

re le vant

take

ve hic le .

made

ap p lic atio ns .
as

do

ve hic le s .

tyre ,

Rim
p rimarily de s igne d

fo r us e

on

fo r us e

on

mo to r

de tails

ide ntifie d

in

as

the

tab le s

s ho wn

in

in

Part 1 o f this

s tandard

are

B S AU 5 0 -4.

o r the ir de rivative s.

3 .3 c o m m e rc ial ve hic le tyre
Pne umatic

tyre ,

p rimarily de s igne d

6 Inflatio n p re ss ure s
The

ve hic le s

that c arry go o ds

inflatio n

p re s s ure s

s p e cifie d

in

the

tab le s

in

and/o r fare -p aying
Part 1 o f this

s tandard

ap p ly to

tyre s

at

amb ie nt

p as se nge rs .

3 .4 c yc le tyre
Pne umatic
with

©

BSI

two

1 998

tyre ,

p rimarily de s igne d

o r thre e

fo r us e

on

c o nditio ns

and

due

ve hic le

to

the

do

no t

inc lude

any

p re s s ure

b uild-up

o p e ratio n.

cyc le s

whe e ls.

1


7 Anti- s tatic p ro p e rtie s

Tyres required to have anti-static properties shall
conform to the appropriate requirements of BS 2 050.

8 Tyre m arkings
Tyre sidewall markings shall be permanent and
legible.
NOTE 1 . It is preferab le that tyre markings are on both sidewalls.
NOTE 2 . Markings sp ecified in BS AU 50 are internationally
agreed. Additional markings may b e required to satisfy
requirements for UK and other markets.
NOTE 3. Tub es should be permanently and legibly marked with

Section width
Overall width

Overall diameter

Nominal mm diameter

Section height

their suitab le range of tyre size.

S i d e wa l l

Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 1 : 20 G M T+00: 00 2006, U n con trol l ed Copy, (c) BSI

B S A U 5 0 : P art 1 : S e ction 0d : 1 998

F igure 1 . Typ ic al tyre se ctio n

2

©

BSI 1 998


Li cen sed Copy: Lon d on Sou th Ban k U n i versi ty, Lon d on Sou th Ban k U n i versi ty, Sat Dec 09 02: 1 1 : 20 G M T+00: 00 2006, U n con trol l ed Copy, (c) BSI

BS AU 50 : Part 1 : Section 0d : 1998

Bibliography

BSI publications
B RITIS H

STAN D ARD S

IN STITUTIO N ,

LO N D O N

Co nversio n facto rs and tab les

BS 350

Specificatio n fo r SI units and reco mmendatio ns fo r the use o f their

BS 5555

multiples and o f certain o ther units
BS

AU 5 0

:

S ub se c tio n

©

BSI

1 998

Part 1
3. 2 a :

:

S e c tio n

1 991

3

:

Tyres and wheels Ð Tyres Ð Off-the-ro ad tyres Ð Specificatio n fo r narro w

and wide b ase tyre lo ads and inflatio n pressures

3


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