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 10231:1997 In c o rp o ratin g A m e n dm e n t No (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 NO COPYING W" 0UT BSI PERMISSION EXCEPT AS PEBBílTiED BY COPYRIGHT LAW Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy BS A U 50- 63 : 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 023 : 9 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 0- a: 9 , 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 0- 6b: 9 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 : - 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 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 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 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 t i t l e p ag e , p ag e s ii t o i v , p ag es to 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 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 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 Fe b ruary 998 B S I 06- 2000 ISB N O 580 29169 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 D ate C o mme nts 08 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 BSI 06-2000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Inside fro nt cover 111 0231 i BS AU 60-1.6.6b:1998 IS0 I N TERN ATI ON AL 0231 S TAN D AR D Second edition 997- 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 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Contents Page 111 Foreword S cope Normative reference Definitions 3.1 bead s e p arati o n 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 3.6 i n n e rl i n e r s e p arati o n 1 3.7 open splice 3.8 ply s e p arati o n 3.9 sidewall s e p arati o n tre ad s e p arati o n 3.1 te s t rim 1 1 t e s t d r u m s peed ty re s peed maximum load rat i n g T e s t e q u i p me n t a n d its re q u i re me n ts Tes ting Requirements 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 k d h Annex C (informative) B ibliography Figure A Tab le - Tes t p arame te rs for e n du ran c e Tab le - Inflation p re s s u re s for high s peed Tab le - Inflation p re s s u re s for c entrifugal growth Tab le - Minimum b re aki n g energy Tab le B l - I n i ti al t e s t s peeds 11 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy O B SI 06-2000 B S AU 50-1.6.6b: 1998 Foreword IS (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 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 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 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 023 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 023 : 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 10231:1997/Amd.l:1999 (E) IS (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 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 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 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 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 % of t h e member bodies c as ti n g a vote Amendment to I n te rn at i o n al S ta n d a rd IS 023 : 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 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 BSI 06-2000 111 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy ~ ~ - B S AU 50-1.6.6b: 1998 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 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 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 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 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 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 4223 - : 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 : 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 te s t d r u m s peed 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 de fi ni ti o ns g iven i n I S 4223 - 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 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 BSI 06-2000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy Test equip ment and its requirements 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 to S treng th test Fo r t h e ty re c entrifugal growth t e s t (see ) , t h e 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 , * * 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 , m % or m Pre p a tio n of tyre % 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 M 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 h Test p ro c e du re 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 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 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 * , % 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, 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 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 7) at eac h of five s peed s h al l b e w i th i n * 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 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 a n d s maller, t e s t t h e t y re a t th re e points 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 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 * 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 kP a Te s t a xle , i n j oules by 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 * , mm a n d a l a t e l ru n - o u t l e s s t h a n k0 , 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 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 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 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 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 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n 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 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 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 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 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 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 - Test parameters for endurance les s than th o s e s ho w n in T ab l e M n tai n th e 08 h 1 % % % 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 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 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 75 -1 ) B I n the ty re l o ad rate d 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 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 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 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 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 mi n the on a on a ,7 m 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 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 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 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 M 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 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 I Table 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 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 Pos ition t h e contour o utline device a n d 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 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 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 5.4.2.6 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 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 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 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n 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 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) BSI 06-2000 Reprodu ced by I H S u n d er l i cen se wi th BSI - U n trol l ed Copy ~ S TD BS I BS AU 998 50-1 -6*bB-ENGL Lb2 669 3 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 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 ü E _- a -X \ I / I Y Overal l wid th, W NOTE For the overall width, W, and for the dynamic tyre section height, ffdyni s ee NOTE The Y-axis i s perpendicular to the X-axis and to the wheel axi s I IS 5751 -1 : 994,5.2 Figure A l Reprodu ced by I H S u n d er l i cen se wi th BSI - U n 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 0/60 V B 6, /6 VR 0/60V (e g ZR , 0/60 than 24 km/h s e p a t e hi g h S u c h ty re s s p eed mu s t 6, Z B 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 to 12 Part 1: Tyres Motorcycle tyres and rims (code-designated series) - Diameter codes to 12 Part 2: Rims IS 77-1 : 997, [2] IS 4249 - : , [3 ] Is0 4 - : 9 , [4] I S 24 - : 9 , [ 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 /6 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 , /6 of t y r e s c o de V or /6 VJ3 ) ; and W fo r s peed marke d w i th (e g The IS0 ZR /6 re fe re n c e s y mb o l or rate d - fo r t h e 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 - 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 ~ ) 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 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 e q u i p me n t IS - : 9 4, [6] IS - 2: 9 , [7 ] IS - : 9 4, [8 ] IS 05 - : 9 , [9] IS 605 4- 2: 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 mi n ; a n d fi n al l y , 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 21 km /h 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 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 - 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