Bsi bs au 050 1 6 6b 1998 (iso 10231 1997) scan

BRITISH STANDARD AUTOMOBILE SERIES

BS AU

50-1.6.6b:1998
I S 0 10231:1997

In c o rp o ratin g
A m e n dm e n t No . 1
(ren u m b ers the B S a s

Tyres and wheels Part 1: Tyres Section 6: Motorcycle tyres Subsection 6.6b: Method of test for
verifying tyre capabilities

ICs 43. 140 83. 160. 10

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BS A U 50- 1 . 6. 63 : 1 998)


National foreword

T h i s B r i t i s h S t a n d a r d re p ro du c e s v e r b a t i m I S 0 1 023 1 : 1 9 9 7 a n d i mp l e me n ts it

as t h e UK n ati o n al s t a n d a r d by a m e n d m e n t to B S AU 5 0- 1 . 6 . 6 a: 1 9 9 8 ,
s u p e r s e d i n g a n d re n u mb e ri n g

t h e s t a n d a r d as B S AU 5 0- 1 . 6. 6b: 1 9 9 8 .

T h e UK p arti c i p ati o n i n its p r e p a r a t i o n w a s e n t r u s t e d to Te c hni c al C o mmi tte e
AUE/4, Whe el s a n d t y r e s for mo to r vehic les , w hi c h h a s t h e res p o ns i b i l i ty to :

- ai d e n q u i re rs t o u n d e rs t an d t h e te x t;

-

p r e s e s n t t o t h e re s p o ns i b l e i n te rn ati o n aU E u ro p e an c o mmi tte e a n y

e n qu i ri e s o n t h e i n t e r p r e t a t i o n , o r p ro p o s als fo r c h an g e , a n d ke e p t h e UK
i n t e r e s t s i nfo rme d;

-

mo ni to r r e l a t e d i n t e r n a t i o n a l a n d E u r o p e a n dev e l o p me nts

and

p ro mu l g ate t h e m i n t h e UK.
A l i s t og o rg an i z ati o n s re p re s e n te d
re qu es t

to

o n t h i s c o mmi ttee c a n b e o b tai n e d o n

its s e c re tary .

Cross-references
T h e B r i t i s h S t a n d a r d s w hi c h i mp l e me n t i n t e r n a t i o n a l o r E u r o p e a n

p u b l i c ati o ns

re fe rre d t o i n t h i s do c u me nt may b e fo u nd i n t h e B S I S t a n d a r d s

C atalo g u e u n d e r t h e s e c ti o n e n t i t l e d ? I n t e r n a t i o n a l S t a n d a r d s C o rre s p o ndenc e
Inde x ? , o r by u s i n g t h e ?Find? fac i l i ty of t h e B S I S t a n d a r d s El e c tro ni c
C atal o g u e .

A

B r i t i s h S t a n d a r d do e s n o t p u r p o r t t o i nc lu de al l t h e ne c es s ary p ro vis io ns

of

a c o n trac t. U s e r s of B r i t i s h S t a n d a r d s are re s p o ns i b l e fo r t h e i r c o rre c t
ap p l i c ati o n.

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

Summary of pages
T h i s do c u me nt c o mp ri s e s a fr o n t c o ver, a n i n s i d e fro n t c o ver, p ag e s i a n d ii, t h e

I S 0 t i t l e p ag e , p ag e s ii t o i v , p ag es

1 to 7 a n d a b ac k cover.

T h e B S I c o p yrig ht no tic e di s p lay e d i n t h i s do c u ment i n d i c ate s w h e n t h e
T h i s B ri ti s h S tan d ard , hav i ng
b e en p rep ared unde r t h e

d o c u me n t w as l a s t i s s u e d.
S i d e l i n i n g i n t h i s do c u me nt i n d i c ate s t h e mo s t re c e n t c h an g e s by a m e n d m e n t .

di re c ti o n of th e Eng i nee ri ng
S e c to r B oard,

was

p u b l i s hed

u n d e r t h e au th o ri ty of th e
S t a n d a r d s B o ard an d comes
i nto effect on

15

0

Fe b ruary

1 998

B S I 06- 2000

ISB N

O 580 29169

3

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

Amd. No.

D ate

C o mme nts

1 08 3 2

J u n e 2000

I n d i c ate d by a s i de li ne


B S AU 50-1.6.6b31998

Contents

Page
National foreword
Foreword

Text of I S 0

8 BSI 06-2000
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Inside fro nt cover

...

111

1 0231

1

i


BS AU 60-1.6.6b:1998

IS0

I N TERN ATI ON AL

1 0231

S TAN D AR D

Second edition
1 997- 1 2-01

Motorcycle tyres

- Test methods

for verifying tyre capabilities

PneumatÌques

pour

mtocycks -.

de I'aptitude des pneumatiques

Mdthodes

d'essai pour

la Veriticarion

Reference numbei

IS0 10231:1997(E1

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Contents
Page
...

111

Foreword
1

S cope

1

2

Normative reference

1

3

Definitions

1

3.1

bead s e p arati o n

1

3.2

belt s e p arati o n

3.3

c h u n ki n g

3.4

cord s e p arati o n

3.5

crac king

1

1
1

3.6

i n n e rl i n e r s e p arati o n

1
1

3.7

open splice

1

3.8

ply s e p arati o n

3.9

sidewall s e p arati o n

3 . 1 0 tre ad s e p arati o n
3.1 1

te s t rim

1
1
1

1

3 . 1 2 t e s t d r u m s peed

1

3 . 1 3 ty re s peed

1

3 . 1 4 maximum load rat i n g

1

4

T e s t e q u i p me n t a n d its re q u i re me n ts

2

5

Tes ting

2

6

Requirements

4

Annex A (normative) Enveloping curve for th e contour of t h e
ty re for t h e c entrifugal growth t e s t
Annex B (informative) Tyres s u i tab l e for s peeds over 2 4 0 k d h
Annex C (informative) B ibliography
Figure A. 1
Tab le 1 - Tes t p arame te rs for e n du ran c e
Tab le 2 - Inflation p re s s u re s for high s peed
Tab le 3 - Inflation p re s s u re s for c entrifugal growth
Tab le 4 - Minimum b re aki n g energy
Tab le B . l -

I n i ti al t e s t s peeds

..

11
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O B SI

06-2000


B S AU 50-1.6.6b: 1998

Foreword
IS 0 (the I n te rn ati o n al O rganization for S tandardization) is a worldwide
federation of n ati o n al s t a n d ard s bodies ( I S 0 memb er bodies). The work of
preparing I n te rn ati o n al S ta n d a rd s is normally carried o u t th ro u g h IS 0 technical
committees . Eac h memb er body i n te re s te d i n a s ubj ect for which a technical
committee h a s b een es tab lis hed has t h e ri g h t t o be repres ented on t h a t
committee. I n te rn ati o n al organizations , governmental a n d non- governmental,
i n liais on w i th IS O , als o t ake p a r t i n t h e work. IS 0 collaborates closely w i th t h e
I n te rn ati o n al Electrotechnical Commission (IEC) on all ma t te rs of
electrotechnical s tan dardi z ati o n .
D raft I n te rn ati o n al S ta n d a rd s adopted by t h e tec hnic al c ommittees a re
c irc ulated to t h e memb er bodies for voting. Pub lication as a n I n te rn ati o n al
S ta n d a rd re q u i re s approval by a t l e a s t 75

% of t h e member bodies c as ti n g a vote.

I n te rn ati o n al S t a n d a r d IS 0 1 023 1 was prepared by Technical Committee
IS OíTC 31 ,
m o to rc y c le

Ty re s ,

ty re s

ri m s a n d

and

v a lv e s ,

Su b c o m m i tte e

SC

10,

Cy c le ,

m o p e d,

ri m s .

T h i s second edition cancels a n d replaces th e fi rs t edition ( I S 0 1 023 1 : 1 992), of
which it c o n s ti tu te s a technical revision.
Annex A forms a n i n te g ral p a r t of th i s I n te rn ati o n al S ta n d a rd . Annex B an d
Annex C a re for information only.

Foreword to I S 0 10231:1997/Amd.l:1999 (E)
IS 0 (the I n te rn ati o n al O rganization for S tan dardi z ati o n ) is a worldwide
federation of n ati o n al s t an d a rd s bodies (IS 0 memb er bodies). T h e work of

p re p ari n g I n te rn ati o n al S t a n d a r d s is normally c arri e d o u t th ro u g h I S 0 tec hnic al
committees . Eac h memb er body i n te re s te d i n a subj ect for which a technical
committee h a s b een es tab lis hed h a s t h e right to be re p re s e n te d on t h a t
committee. I n te rn ati o n al organizations , governmental a n d non- governmental,
i n liaison w i th IS O, als o t a k e p a r t i n t h e work. IS 0 collaborates closely w i th t h e
I n te rn ati o n al Electrotechnical Commission (IEC) on al l m a tt e rs of
electrotechnical s tan dardi z ati o n
I n t e rn a ti o n a l S t a n d a r d s are drafted in accordance w i th t h e ru l e s given in t h e
IS ODEC Directives, Part 3.
D raft I n te rn ati o n al S t a n d ard s adopted by t h e tec hnical committees a r e
circ ulated t o th e memb er bodies for voting. Pub lic ation a s a n I n te rn ati o n al
S t a n d a rd re q u i re s approval by at l e as t 7 5

%

of t h e member bodies c as ti n g a vote.

Amendment 1 to I n te rn at i o n al S ta n d a rd IS 0 1 023 1 : 1 997 w as prepared by
Technical Committee IS O/TC 31 ,
Cy c le ,

m o p e d,

m o to rc yc le

ty re s

Ty r e s ,

and

ri m s

and

va lu e s ,

S ub c ommittee S C 1 0,

ri m s .

Descriptors: road vehicles, motorcycles, ty res , pneumatic ty res , tes ts , laboratory tes ts , performance

tes ts , te s t equipment, tes ti ng conditions.

...

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~

~

-

B S AU 50-1.6.6b: 1998

1 S cop e

3.2
b elt s e p arati o n

T h i s I n t e r n a t i o n a l S t a n d a r d s p ec ifies tes t me th o d s
fo r verifying t h e c ap ab i l i ti e s of t y r e s for motorcycles .
Of t h e t e s t metho ds p re s e n te d ,

p a r t i n g of r u b b e r c o mp o und b etw e e n b e l t l a y e r s o r
b e tw e e n b e l ts a n d p l i e s

o nly s o me may b e

re q u i re d d e p e n d i n g o n t h e ty p e of t y r e to be t e s t e d .

3.3

T h e t e s t s a r e c a r r i e d o u t i n a l ab o rato ry u n d e r

c h u n ki n g

c o ntro lled c o ndi ti o ns .

b r e a k i n g aw ay of p iec es of t h e t r e a d

It i n c l u d e s a s t r e n g t h t e s t for as s e s s i n g t h e

3.4

c ap ab i l i ty of t h e t y r e s t r u c t u r e , w i t h re s p e c t t o

c o rd s e p arati o n

b r e a k i n g e n e rg y , i n t h e t r e a d a r e a .
cord p a r t i n g fro m ad j ac e n t ru b b e r c o mp o u nds
A s eco nd t e s t , t h e e n d u r a n c e t e s t , a s s e s s e s t h e
re s i s tan c e of t h e t y r e w i t h re s p e c t to s ervice at fu l l

3.5
c rac ki ng

lo ad a n d mo d e rate s p e e d o v er l o ng d i s tan c e s .
T h e t h i r d t e s t , t h e h i g h s p e e d t e s t , as s e s s e s t h e

a n y p a r t i n g w i t h i n t h e t r e a d , s i de w al l o r i n n e rl i n e r

c ap ab i l i ty of t h e t y r e a s r e l a t e d to s e rv i c e at t h e

of t h e ty re e x te n d i n g to cord m a t e r i a l

max i mu m s p e e d c ap ab i l i ty of t h e t y r e . It do es no t

3.6

ap p l y t o t y r e s w i t h a s p e e d c ap ab i l i ty
below

i n n e rl i n e r s e p arati o n

1 3 0 km/h.

p a r t i n g of i n n e r l i n e r fro m cord m a t e r i a l i n t h e
T h e c e n tri fu g al g ro w th t e s t a s s e s s e s t h e max i mu m

c arc as s

g ro w th of t h e t y r e u n d e r t h e i nfl u e nc e of c e n tri fu g al
fo rc es a t t h e max i mu m s p e e d c ap ab i l i ty of t h e ty re .
T h i s ap p l i e s o nly t o ro ad t y r e s w i t h s p e e d s ymb o ls

P

3.7
o p e n s plic e
a n y p a r t i n g a t a n y j u n c ti o n of t r e a d , s i d e w al l o r

a n d above.
T h e t e s t me th o d s p re s e n te d

i n this I n t e r n a t i o n a l

i n n e r l i n e r t h a t e x te n d s t o co rd m a t e r i a l

S t a n d a r d a r e n o t i n t e n d e d fo r g r a d a t i o n of t y r e

3.8

p erfo rmanc e o r q u al i ty levels .

ply

T h i s I n t e r n a t i o n a l S t a n d a r d ap p l i e s to a l l

p a r t i n g of r u b b e r c o mp o und b e tw e en ad j ac e n t p lies

motorcycle ty re s .

s e p arati o n

3.9
s i d e w a l l s e p arati o n

2 Normative reference

p a r t i n g of t h e r u b b e r c o mp o und fro m t h e cord
T h e following s t a n d a r d c o n tai n s p ro vis io ns w hi c h,

m a t e r i a l i n t h e s i d e w al l

t h r o u g h re fe re nc e i n t h i s t e x t , c o n s ti tu te p ro vis io ns
of t h i s I n t e r n a t i o n a l S t a n d a r d . At t h e t i m e

of

p u b l i c ati o n, t h e e di ti o n i ndi c ate d w a s v al i d. All
s t a n d a r d s a r e s u b j e c t to re v i s i o n, a n d p a r t i e s t o
a g r e e m e n t s b as e d o n t h i s I n t e r n a t i o n a l S t a n d a r d

a r e enc o u rag ed t o i n v e s ti g ate t h e p o s s ib ility of

3.1 0
tre ad s ep arati o n

p u l l i n g aw ay of t h e t r e a d fro m t h e t y r e c arc as s

3.11
te s t ri m

ap p l y i ng t h e mo s t re c e n t e di ti o n of t h e s t a n d a r d
i n d i c ate d below. M e mb e rs of I E C a n d IS 0 m a i n t a i n
re g i s te rs of c u r r e n t l y v al i d I n t e r n a t i o n a l S t a n d a r d s .

IS 0 4223 - 1 : 1 9 8 9 ,

De fin itio n s

th e ty re i n du s try - P a r t

of

s o m e te rm s u s e d i n

1 : Pn e u m a ti c ty re s .

a n y r i m o n w hi c h t h e t y r e may b e fi tte d t h a t
co nfo rms t o t h e d i me n s i o n s of t h e re c o mme nde d
r i m s fo r t h e p a r t i c u l a r t y r e d e s i g n ati o n a n d ty p e

3.1 2
te s t d r u m s peed

3 D efinitions

s p e e d of t h e o u t e r s u rfac e of t h e s t e e l t e s t d r u m

Fo r t h e p u rp o s e s of t h i s I n t e r n a t i o n a l S t a n d a r d , t h e

3.1 3

de fi ni ti o ns g iven i n I S 0 4223 - 1 a n d t h e following

t y r e s peed

de fi ni ti o ns ap p ly.
p e ri p h e ral

3.1
bead s e p arati o n

s p e e d of t h e t r e a d s u rfac e

3.1 4
maxi mum load rati n g

b re akd o w n of b o nd b e tw e e n c o mp o ne nts i n t h e b e ad
area

max i mu m l o ad t h e t y r e is r a t e d t o c a r r y a t t h e

max i mu m s p e e d

NOTE

M axi mum s p eed me an s t h e s p ee d c o rres p o nding to t h e

s p ee d symbol on t h e ty re o r th e maximum t y r e s p eed c ap ab i l i ty
specified by t h e ty re manu fac tu re r.

8 BSI 06-2000
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1


4 Test equip ment and its requirements

5 T esting

T h e t e s t e q u i p me n t cons is ts of i te ms i n 4 . 1 to 4 . 5 .

5. 1 S treng th test

Fo r t h e ty re c entrifugal growth t e s t (see 5 . 4 ) , t h e

5. 1 . 1

me as u re me n t e q u i p me n t accuracy s h a l l be
w i th i n i l
4.1

%

of full scale.

Te s t d r u m ,

*

*

5 . 1 . 1 . 1 Mount t h e t y re on a t e s t ri m a n d inflate it to

t h e p re s s u re specified i n relation to t h e maximum

cylindrical driven flywheel (drum)

having a di ame te r of 1 , 7 m

1

% or 2 m

Pre p a ra tio n of tyre

1

%.

The s urfac e of t h e d r u m s h a l l be s mooth s teel. T h e

w i dth of t h e t e s t s urface s h al l exceed t h e overall
w i dth of t h e te s t tyre.
Fo r t h e t e s t d ru m , t h e loading device may be a
dead- weight c antilevered s ys tem w i th a hydraulic
s y s te m or w i th an y o th e r equivalent s ys tem. The

load rati n g .
5. 1 . 1 . 2 M ai n tai n t h e as s emb ly at te s t room

t e mp e rat u re for at l e as t 3 h .
5. 1 . 2

Test p ro c e du re

5 . 1 . 2 . 1 Readj us t t h e ty re p re s s u re to t h a t specified

i n 5.1 .1 .1 before or a ft e r t h e mounting of th e
ass embly on a fixture.

loading capacity s h a l l b e ade q u ate for t h e

5. 1 . 2. 2 Position t h e plunger a s n e a r to t h e centreline

re q u i re me n ts of t h e procedure a n d t h e accuracy

as possible, avoiding p e n e trati o n i n to t h e t re a d

s h a l l be w i th i n * 1 , 5

% of t h e full scale.

For th e test d ru m , t h e s peed capability of t h e

*

grooves, a n d force t h e plunger perpendic ularly i n to
t h e tre ad a t a rat e of 50 mm/min

2, 5 m d m i n .

e q u i p me n t shall be ade q u ate for t h e re q u i re me n ts of

5. 1 . 2. 3 Record t h e force a n d p e n e trati o n at t h e

t h e t e s t methods. The accuracy of t h e t e s t d ru m

moment of b re aki n g (see als o 5. 1 . 2. 7) at eac h of five

s peed s h al l b e w i th i n * 3

t e s t points approximately equally s paced aro u n d

4.2

P l u n g e r,

% of th e fu l l s cale.

cylindrical s te e l plunger of sufficient

l e n g th w i th a hemis pheric al e n d a n d a di ame te r
of 8 mm

f 0,6 mm.

For t h e plunger equipment, t h e loading device s h al l
be of hydraulic type or equivalent s y s te m w i th a
maximum load c apac ity ade q u ate for t h e

t h e circumference of t h e ty re . I n c as e of ty re s
mounted o n ri m di ame te r codes 1 0 a n d s maller, t e s t
t h e t y re a t th re e points.
5 . 1 . 2 . 4 If th e ty re fails t o b re a k before t h e plunger is

stopped on reac hing t h e rim, t h e n t h e ty re is deemed
t o have pas s ed t h e t e s t at t h a t point.

re q u i re me n ts of t h e t e s t methods. Indic ators of

5. 1 . 2. 5 Compute t h e b re aki n g energy,

dis placement a n d of force s h a l l be provided w i th a n

for eac h t e s t point, except thos e considered

accuracy w i th i n

k1

% of full s cale.

For t h e plunger e q u i p me n t, t h e s peed of t h e
dis placement s h al l be controlled w i th a n accuracy
w i th i n * 3
4.3

%

of t h e fu l l scale.

In fl a t i o n p re s s u re g a u g e s ,

w i th i n *1 0 kP a .
Te s t a xle ,

i n j oules

by 5. 1 . 2. 4, by me an s of t h e following formula:

XP
W=-F2 O00

where
with a maximum

s cale value of a t l e a s t 400 kP a w i th a n accuracy

4.4

W,

for t h e ty re c entrifugal growth te s t,

t h e t e s t axle an d t h e rim s h al l be controlled i n o rde r
t o e n s u re a radi al ru n - o u t les s t h a n * 0 , 5 mm a n d a
l a t e ra l ru n - o u t l e s s t h a n k0 , 5 mm w hen me as u re d

F
P

is th e force, i n newtons ;

i s th e penetration, i n millimetres.

5. 1 . 2. 6 D etermine t h e b re aki n g energy value for t h e

ty re by computing t h e average of th e values
obtained.

res pectively at t h e b ead s e a t a n d t h e vertic al p a r t of

5. 1 . 2. 7 When a n ap p ro p ri ate device which

the i n n e r flange of t h e ri m immediately above t h e

automatic ally e v al u ate s t h e value of th e energy

b e ad s e a t radius .
4. 5

Co n to u r o u tli n e de v i c e ,

s u c h a s a proj ecting grid,

c ame ra, etc. which p e rmi ts t h e dis tinc t outlining of

W

is

available, t h e p e n e trati o n c an be s topped s hortly
afte r having achieved th e pres cribed value.
5. 1 . 2. 8 I n t h e cas e of tub eles s ty re s , me an s may b e

t h e e x te rn al contour of t h e t y re

provided t o e n s u re t h e re te n ti o n of t h e inflation

cros s- s ection n o rmal to t h e ty re e q u ato r, at t h e point

p re s s u re for th e du rati o n of th e te s t.

of t h e maximum deformation of t h e tre ad.
The device s h al l reduce to a minimum an y dis tortion
a n d e n s u re a c o n s tan t (known) rati o between t h e
plotted c ontour a n d t h e ac tu al dimens ions .
T h e device s h a l l p e rmi t t h e reference of t h e t y re
c ontour to t h e wheel axis .

O BSI 06-2000

2

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

~

~~


Endurance test

5.2

5.2.1

Pr e p a r a ti o n

5.2.1.1
the

Mount the

p re s s u re

Table
on

a

c o rre s p o n d i n g

t e s t ri m

to

the

and

i n fl a te

max i mu m

les s t h a n

5.2.2

35 "C

fo r

as s e mb l y

3

a t l e as t

a t a t e m p e r a t u r e no t

T,

Re adj u s t

s p e c i fi ed i n

5.2.2.2

the

5.2.1.1

Mo unt

a n d p re s s

the

it

ty re

p re s s u re t o

i m m e d i a te l y

ty re

a n d ri m

ag ai n s t t h e

the

b efo re

Re i n fo rc e d íe x tra

te s ti n g

as s e mb l y

on a

te s t

tes t

5.3.1.2

dru m.

6.2.2.3

D u ri n g t h e

a d i s tan c e

than

1

tes t t h e

amb i e n t te mp e ratu re ,

less th a n

the

s h al l be

ty r e ,

made

1 50 m m

s h al l be

at

a n d no t

le as t

fo r c o o li ng t h e

35

ty re

a t

mo re

OC.

No

d u ri n g

tes t.

5.2.2.4
no t

no t

m fro m

p ro v i s i o n

th e

of

les s th a n

p e ri o d s

no t

Table

1

80

te s t,

k m h ,

w i t h o u t i n t e r r u p t i o n s , at

te s t

w i th

l o ad s

and te s t

1.

- Test parameters for endurance
les s

than

th o s e

s ho w n

in

T ab l e

M ai n tai n th e

1 08

3

1 2 4 h

1 1 7

%
%
%

u,

S

300

H, v

350

Te s t m e th o d

5.3.2.1

B efo re

as s e mb l y

that

on

5.3.2.3

Ap p ly

rati n g

%

85

of t h e

Fo r

IS0

(s ee

Annex

e q u al

t y r e to

load

(load

l o ad r a t i n g i s

gives

c as e

i n fo rmati o n

of t y r e s

1 5 and

65

to

the

the

% of

index) .

75

ab o ve

s h a l l be

5.3.2.4
no t

be

%

te s t

and

ty re

ri m

p re s s u re

ag ai ns t th e

of t h e

max i mu m

axl e .

max i mu m

l o ad

rati n g

Fo r s p e e d s ymbol

the

%

on

re l ate d

de s i g ned

rate d

i . e.

and

ty re s

a

75

l o ad

of t h e

T h ro u g h o u t

c o rre c te d

the

hi g h

fo r

load

W

ty re s ,

(load i n de x )

s p e e d te s ts .

h e av y w e i g h t

w i th

a

te s t th e

tes t

the

ty re

ty re

l o ad

di ame te r

i nde x

v e rs i o n ,

max i mu m

and the

ri m

c ap ac i ty

ab o v e i n re i n fo rc e d íe x tra- l o ad

l o ad

ty re

a n d r i m as s e mb l y

dru m.

t o u r i n g mo to rc y c l e s

c o de

the

h.

5 75 1 -1 ).

B

I n the

ty re

l o ad

rate d

3

re ad j u s t t h e

s ymbol V ty re s ,

s p eed

of t h e

max i mu m

mi n .

a

at t e s t

as s e mb l y

than

5.3.1.

te s t

of t h e

ri m

les s

mo u n ti n g

ax l e ,

in

P re s s t h e

o u t e r fac e

is

te s t

s p e c i fi e d

5.3.2.2

l o ad

o r a ft e r

a

320

and

5.3.2

th e

1 00

ty re

t e m p e r a t u r e fo r n o t

NO T E

tyre maximum load rating
mi n .

R,

250

inc lus i ve

l o ad

ro o m

to

C o ndu c t t h e

P

W

v al u e

o u t e r fac e of a

kP a

M to

l o ad

Q,

h.

Te s t p r o c e du r e

5.2.2.1

ax l e

r
S tan dard

M ai n tai n t h e

Inflation
pressure

to

l o ad

rati n g .

5.2.1.2

Speed symbol

Tyre version

o fty re

ty re

- Inflation pressures for high speed

2

65 an d

ap p l i e d

l o ad r a t i n g .

p re s s u re

s h al l be

s hall

ke p t

c o n s t a n t.

5.3.2.5
ro o m

and

D u ri n g

30

O

C

,

or

a t

m a n u fa c t u r e r

5.3.2.6
as

te s t

a)

The

-

Q

BSI

06-2000

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

in

the

te mp e ratu re i n

a

hig her

20

th e

tes t

"C

t e m p e r a t u r e if t h e

ty re

a g re e s .

re l a ti o n

dru m

s p eed

b)

tes t,

C a r r y t h e t e s t t h r o u g h w i th o u t i n t e r r u p t i o n s

fo llo w s ,

the

the

m a i n t a i n e d at b e tw e e n

s h al l be

to

the

ty re

s p eed

s y mb o l a n d

d i a m e t e r.

i ni ti al t e s t

s peed

is e q u a l to

the

ty re ' s

c ate g o ry :

les s

40

les s

30

km/h
km/h

Ac c e l e rate

such th a t

the

e n d of 2 0

mi n

the

on

a

on a

1 ,7 m

2

m

e qu i p me nt

i ni ti al te s t

fro m

dru m;

or

dru m.

at

a c o n s tan t r a t e

s p e e d is

re a c h e d

at t h e

s tart- u p .

3

6 Requirements
6.1

Tes t sample

Three ty re s w i th identic al c harac teri s ti c s e. g. s ize
des i g nati o n a n d service des c rip ti o n o r maximum
load r a t i n g a n d s p eed c ap ab i li ty, s h a l l compris e a
te s t s ample:
a) one ty r e s h al l be us ed for t h e me as u re me n t of
s t re n g t h ;
b) a second t y re for t h e e n d u ran c e t e s t ;
c) a th i r d for t h e high- s peed performance t e s t
andíor t h e c entri fug al g ro wth t e s t .
The p res s ures , loads a n d s p eeds s h a l l be a s specified
for e ac h test metho d.
Eac h te s t s amp le s h al l conform t o t h e re q u i re me n ts
specified i n 6.2 to 6.5 a s ap p ro p ri ate.

Inflation pressure
kPa

Speed symbol

P

Q

6.2 S treng th te s t
6. 2. 1 Eac h t e s t s amp le s h al l me e t a t l e a s t t h e

225

specified i n Tab le 4, w h e n te s te d i n accordance

250

to S inclus ive

280
290

T to H inclus ive
over 21 0

re q u i re me n ts for mi ni mum b re aki n g energ y

km/h

w i th 5.1 .

5.4.1 .2 M ai n tai n t h e ty re a n d ri m as s embly a t t e s t

room te m p e r a tu r e for not les s t h a n 3 h.
5.4.2

Test p ro c edu re

5.4.2.1

Readj us t t h e ty r e p re s s u re t o t h e value

specified i n 5.4.1 .1 .

I

Table 4

I

- M i n i m u m breaking e n e r g y

Tyre version

Minimum breaking energy

J

Lig ht

17

S tandard

34

Reinforcediextra lo ad

45

5.4.2.2 Mount t h e ty re a n d ri m as s embly on t h e test

6.2.2 For ty re s w i th a des ign s ection w i d th l e s s

axle a n d e n s u r e t h a t t h e as s embly ro tate s freely.

than

5.4.2.3

as c e rtai n t h a t it is p erp endic ular to t h e ro tatio n of
t h e test ty re tre ad .
5.4.2.4

mm, t h e requi red energ y value is to be

6.3

%.

Enduranc e te s t

6. 3. 1 When t h e ty re h a s b een s ubj ected t o th e

Accelerate t h e as s embly wi tho ut

laboratory e n d u ran c e t e s t specified i n 5.2, u s i n g a

i n te rru p ti o n to reac h t h e maximum s peed capability
of t h e ty re w i th i n

62

reduced by 1 5

Pos ition t h e contour o utline device a n d

5 min.

t e s t ri m a n d a valve which underg o n o p e rman e n t
deformation a n d allow no loss of a i r , t h e re s h al l be

T h e t y re may b e ro tate d e i t h e r by me an s of a drive

no vis ual evidence of tre ad, ply, cord, b elt o r b ead

motor ac ti ng o n t h e ty re axis o r by p res s ing it

s ep aratio n, c hunki ng , open s plices , c rac king o r

ag ai n s t a te s t d r u m (4.1 ).

b ro ken cords.

5.4.2.5 Check that th e ty r e s p eed is wi thi n

*2

t h e maxi mum s p eed capability of t h e tyre.

%

of

M ai n tai n th e e q u i p me n t a t c o n s tan t s peed for at

least

5

5.4.2.6

min a n d t h e n check t h e ty re contour.
D uring t h e t e s t t h e te mp e ratu re i n t h e t e s t

room s h al l be mai n tai n e d a t b etween
and

30 "C, o r

20 "C

at a hi g her t e m p e r a t u r e if th e ty re

man u fac tu re r agrees .

6.3.2 If t h e fi n al p re s s u re me as u re d i mmedi ately

afte r t h e t e s t is les s t h a n t h e i n i ti al p res s ure, t h e
te s t s h al l be repeated w i th an o th e r s ample.
6.4 H i g h - s p e e d tes t
6. 4. 1 After completion of t h e lab o rato ry high- s peed

te s t specified i n

5.3

us i ng a t e s t ri m a n d a valve

which undergo no p e r m a n e n t deformation a n d allow
no loss of ai r, th e re s h a l l be no vis ual evidence of
t re a d , ply, cord, b e l t o r b ead s e p arati o n , c hunki ng ,
open splices, cracking o r b ro ken cords.
6.4.2 If t h e fi n al p re s s u re me as u re d i mmedi ately

afte r th e te s t is l e s s t h a n t h e i n i ti al p res s ure, t h e
t e s t s h al l be repeated w i th an o th e r s ample.

4
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

B S I 06-2000

I

~

STD-BSI

AU

BS

50-1 =b-bB-ENGL

6.5 C e n t r i fu g a l g r o w t h

1778

I

1624669 0853339 L O 3 II
BS AU 50-1.6.6b:1998

test

6.5.1 The ty re to be te s ted s h al l have pas s ed t h e

high- s peed te s t (see 6.4), o r al te rnati v e ly it s h al l be
a new ty re adequately b roken- in.
6.5.2 The contour of t h e ty re found at th e maximum

s peed s h al l not
in Figure

A.l

exceed

th e enveloping curve defined

w i th reference to t h e ty re axis (i. e. th e

lines XX an d W of t h e c urve s h al l coincide with
thos e of t h e plotted ty re contour) .

6

BSI

06-2000

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

5


~

S TD. BS I

BS

AU

1 998

50-1 -6*bB-ENGL

Lb2 4 669 0 8 5 3 3 4 0 9 2 5

m

BS AU 50-1.6.613:1998

Annex A (normative)
Enveloping curve for the contour of the tyre for the centrifugal growth tes t

Y

5

T
c
æ
O

-

A=

E

O
.c

U

W

u)

u
L

wu

c

tc

.-

U

O

Rim width,

\

\

\

A

-

/

/

I

\

//

I

\
\

/

X9
'

i

QI

c

QI

5

ü

E
_-

a

-X

\ I /

I

Y
Overal l wid th,

W

NOTE 1

For the overall width, W, and for the dynamic tyre section height, ffdyni s ee

NOTE 2

The Y-axis i s perpendicular to the X-axis and to the wheel axi s .

I

IS 0

5751 -1 : 1 994,5.2.

Figure A . l

6
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 B SI

06-2000


STD. BSI BS

1998

50-3-bm bB-EMG L

AU

W

S o me t y r e s

a r e no t

m a r ke d

Annex C (informative)
Bibliography

w i th a

s p e e d s y mb o l

1 3 0/60 V B

1 6, 1 3 0 /6 0 VR

1 3 0/60V

(e. g.

ZR

1 6 , 1 3 0/60

than

24 0

km/h.

s e p a ra t e hi g h

S u c h ty re s

s p eed

mu s t

1 6,

Z B 1 6) and

l3 Ol6O

l 6Or

c e rti fi e d b y t h e tYre manu fac tu re r

Tyres, valves and tubes - List
equivalent terms - Part 1: fire s .
Motorcycle tyres and rims
(Code designated series) - Part 1: Tyres.
Motorcycle tyres and rims
(Co& designated series) - Part 2: Tyre load ratings.
Motorcycle tyres and rims
(Code designated series)
3: Rims.
Motorcycle tyres and rims
(metric series) - Part 1: Design guides.
Motorcycle tyres and rims
(metric series) - Part 2: Tyre dimensions and
load-carrying capacities.
Motorcycle tyres and rims
(metric series) -Part 3: Range of approved rim

contours.
Motorcycle tyres and rims
(code-designated series) - Diameter codes 4 to 12 Part 1: Tyres.
Motorcycle tyres and rims
(code-designated series) - Diameter codes 4 to 12 Part 2: Rims.
IS 0

3 8 77-1 : 1 997,

[2]

IS 0

4249 - 1 : 1 9 8 5 ,

[3 ]

Is0 4 2 4 9 - 2 : 1 9 9 0 ,

[4]

I S 0 4 24 9 - 3 : 1 9 9 7 ,

[ i ]

b u t w i t h a s p e e d c ate g o ry c o de V o r Z w i t h i n t h e s i z e

d e s i g n ati o n

m

0853343

BS AU 50-1.6.6bz1998

Annex B (informative)
Tyres suitable for speeds
over 240 km/h
B.l

3624669

fo r S peeds

u n d e rg o

are

hig her

tw o

te s ts .

Of

- Part

B . l. l
in

T h e firs t t e s t is e q u i v a l e n t t o t h e o ne

-

s p ec i fied

5.3:

fo r V

marke d

( e. g .

-

s peed

w i th

1 3 0 /6 0 V

s y mb o l t y r e s

i n c as e

s p e e d c ate g o ry

1 6 , 1 3 0 /6 0

of t y r e s

c o de V

1 6 or

1 3 0 /6 0 VJ3 1 6 ) ;

and

W

fo r

s peed

marke d w i th

(e. g.

The

IS0

ZR

1 3 0 /6 0

re fe re n c e

s y mb o l

1 6 or

rate d

5 7 5 1 - 2 fo r t h e

1 3 01 60 ZB

l o ad

s ize

of t h e

s a m e ty p e ,

O p e rate t h e

i ni ti al te s t

th e n ,

rate

by

of

-

1 6) .

o ne

s p e c i fi ed i n

d e s i g n ati o n .

in

ac c o rdanc e

5 . 3 . 2. 6 ~ ) is re p l ac e d

-

is t h e

( s e e T ab l e

ac c e l e rate

s uch t h a t t h e

the

ty r e

on a

s e c o nd t y r e

w i th 5.3,

except

b y t h e fo llo wi ng p ro c e d u re .

e qui p me nt w i th

s peed

of t y r e s

Z

c o de

T h e s e c o nd t e s t is p e rfo rme d

B.1 .2

that

t y r e s i n c as e

s p e e d c ate g o ry

the

the

B . l)

tes t

dru m

fo r 2 0

e q u i p me n t

IS 0

5 7 5 1 - 1 : 1 9 9 4,

[6]

IS 0

5 7 5 1 - 2: 1 9 9 4 ,

[7 ]

IS 0

5 7 5 1 - 3 : 1 9 9 4,

[8 ]

IS 0

6 05 4 - 1 : 1 9 9 4 ,

[9]

IS 0

605 4- 2: 1 9 9 0,

mi n:

a t

a

c o n s tan t

max i mu m t e s t s p e e d,

m a n u fa c t u re r ,

at t h e

[5 ]

is re a c h e d

s p e c i fi ed

at t h e

end

1 0 mi n ;

a n d fi n al l y ,

5

fo r

a t the

max i mu m

tes t

s peed

mi n .

Table
Test drum
diameter

Initial test speed

V " R

2,O m

is

km /h

23 0

21 0

km /h

2 4 0 km /h

l o ad

c ap ac i ty

s p e c i fi e d by

equ al to

at t h e

ZRIZB tyres

tyres

200

The tes t

ap p l i c ati o n

Initial test speeds

B . l-

the

65

%

ty re

max i mu m

of t h e

km /h

max i mu m

l o ad

m a n u fa c t u r e r fo r

s peed

c e rti fi e d fo r t h e

t y re .

B.2

T h e ty re ' s

s p e c i fi e d b y

c l e arl y

s p e e d c ate g o ry is t h e

the

m a rke d

i d e n ti fy

a

8 BSI 06-2000
~

m a n u fa c t u r e r

on th e

max i mu m

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

~~

ty re

ty re

s i de

m a x i m u m s p e ed

and

w al l s

s p e e d of 26 0

may

(e. g

V

be

26 0

to

km/h) .

7


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