Bsi bs au 050 4 6 2b 1999 (iso 5751 3 1999)

BRITISH STANDARD AUTOMOBILE SERIES BS AU 50 4 6 2b 1999 ISO 5751 3 1999 Tyres and wheels — Part 4 Rim profiles and dimensions — Section 6 Motorcycle rims — Subsection 6 2b Specification for metric ser[.]

ISO 5751-3:

ICS 4 1 0; 8 1 0.1

This Bri sh Stan ard, ha ing

b en pre ared u der the

directonof the Eng ine ring

SectorCommi e , was

published u der the authoriy

of the Stan ards Commi e

an comes into efect on

1 Ju e 1 9

© BSI 0 -2 0

ISBN 0 5 0 3 4 0 0

This S bsection of this Part of BS AU 5 reproduces v erb tim ISO 5 51-3:19 9

an implements it as the UK national stand rd It super edes

BS AU 5 -4-6.2a:19 5 which is withdrawn The cor espond ing ty re detais are

dealt with in Part 1 ( Subsection 6.2b) of BS AU 5 series

Other Parts of the Stand rd are as folows:

— Pa r t 1: Tyr e;

— Pa r t 2: Whe ls a nd r ims;

— Pa r t 3: Va lve

Part 4 of BS AU 5 ( cov ering rim profi es and d imensions) was introduced to

as ist c os -referencing betwe n ty re specifications and the cor esponding rim

specifications Subsections of Part 4 suc es iv ely super ed ed the information

contained in BS AU 5 -2-1b:19 0 which was conseq uently withd rawn in 19 5

The UK p rticip tion in its prep ration was entrusted to Tech ical Commit e

AUE/4, Ty res and whe ls for motor v ehicles, which has the responsibi ty to:

— aid enq uirer to u d er tand the text;

— present to the responsible international/ European commit e any

enquiries on the interpretation, or proposals for chang e, and ke p the UK

interests informed;

— monitor related international an European dev elopments and

promulg ate them in the UK

A lst of org anizations represented on this commit e can be obtained on

req uest to its sec etary

Cros - referenc s

The British Stand rds which implement international or European

publcations refer ed to in this document ma be fou d in the BSI Stand ards

Catalog ue u der the section entitled “ International Stand ards Cor espondence

Index”, or b using the “Find” faci ity of the BSI Stand rd s Electronic

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A British Stand rd do s not purport to include al the neces ary prov isions of

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Compl anc with a British Standard does not of itselfconfer imm unity

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Sum m ary of pag es

This d ocument comprises a f ont cov er, an inside font cov er, p g es i and i ,

theISO title p g e, p g e i to iv , p g es 1 and 2 and a b ck cov er

This stand rd has be n upd ated ( se copy rig ht d ate) and ma hav e had

amend ments incorporated This wi l be indicated in the amendment ta le on

the inside f ont cov er

Am endm ents is ued sinc publ cation

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Pag e

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Pag e

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Foreword

ISO ( the International Org anization for Stand rdization) is a worldwide

federation of national stand ards bodies ( ISO member bodies) The work of

prep ring International Stand ards is normaly car ied out throug h ISO tech ical

commit e s Each member bod interested in a subject for which a tech ical

commit e has be n esta lshed has the rig ht to be represented on that

commit e International org anizations, g ov ernmental and non-g ov ernmental,

in l aison with ISO,also take p rt in the work ISO col a orates closely with the

International Electrotechnical Commis ion ( IEC) on al mat er of

electrotech ical stand ardization

International Stand rd s are drafted in ac ord nce with the rules g iv en in the

ISO/IEC Directiv es, Part 3

Draft International Stand rds a opted b the tech ical commit e s are

cir ulated to the member bod ies for v oting Publcation as an International

Stand rd req uires a prov al b at least 7 % of the member bod ies casting a v ote

International Stand rd ISO 5 51-3 was prep red b Tech ical Commit e

ISO/TC 31, Tyr es, r ims a nd va lve , S bcommit e SC 10, Cycle, moped ,

motor cycle tyr es a nd r ims

This fourth ed ition cancels an replaces the third edition ( ISO 5 51-3:19 4), of

which it constitutes a technical rev ision

ISO 5 51 consists of the folowing p rts, under the g eneral title Motor cycle tyr es

a nd r ims (metr ic s r ie ):

— Pa r t 1: Design guid es;

— Pa r t 2: Tyr e d imensions a nd loa d -ca r r ying ca pa ciie ;

— Pa r t 3: R a nge o a ppr oved r im contour s

© BSI 0 -2 0

1

1 Scope

This p rt of ISO 5 51 specifies the a prov ed rim

contour for motor y cle rims on which motor y cle

ty res ( metric series) are mou ted

NOT ISO 4 4 de ls wih the re uirements for motorycle

tyres an rims ( code-desig nated series) for rim diameter code 1

an a o e ISO 6 5 de ls wih the re uirements for motorycle

tyres an rims ( code-desig nated series) for rim diameter code 1

an b low

The fol owing normativ e documents contain

prov isions which, throug h reference in this text,

constitute prov isions of this p rt of ISO 5 51 For

d ted references, subseq uent amendments to, or

rev isions of, any of these publcations do not a ply

Howev er, p rties to ag re ments b sed on this p rt

of ISO 5 51 are encourag ed to inv estig ate the

pos ibi ty of a ply ing the most recent editions of

the normativ e d ocuments indicated below For

u d ted references, the latest edition of the

normativ e document refer ed to a pl es Member

of ISO an IEC maintain reg ister of cur ently v al d

International Stand rd s

ISO 424 -3:19 7, Motor cycle tyr es a nd r ims

(cod e-d esigna ted s r ie ) — Pa r t 3: R ims

ISO 5 51-2:19 4, Motor cycle tyr es a nd r ims (metr ic

s r ie ) — Pa r t 2: Tyr e d imensions a nd loa d -ca r r ying

ca pa ciie

ISO 6 5 -2:19 0, Motor cycle tyr es a nd r ims

(Cod e-d esigna ted s r ie ) — Dia meter cod es 4 to 12 —

Pa r t 2: R ims

3 Approved rim contours

3.1 Ta le 1 defines the rang e of permit ed rims

3.2 Ta le 2 lsts the rim contour codes a prov ed for

fitment to motor y cle ty res ( metric series)

The d imensions of the rim contour , the d iameter

d etai s an the complete marking of rims with

nominal rim diameter code 13 an a ov e shal be as

specified in ISO 424 -3

The d imensions of the rim contour , the d iameter

d etai s an the complete marking of rims with

nominal rim diameter code 1 an below shal be as

specified in ISO 6 5 -2

3.3 The recommended rims cor espon to the

measuring rim wid ths specified in ISO 5 51-2

3.4 The d esig n new ty re section width, S, an the

ma imum ov eral wid th in serv ice, W

ma ,

specifiedinISO 5 51-2 wi chang e 1 mm for

each0.1 cod e( 2,5mm) chang e in rim wid th f om

therecommended ( measuring ) rim width

Table 1 — Coeficients for approved rim s

Coeficient, R

x

theor tical, R

th

m inim um , R

min

m axim um , R

ma

Rim wid th = Nominal width ( S

N ) × R

x

Values shal be rou ded to the nearest stand ardiz d nominal rim width code as specified in ISO 424 -3

© BSI 0 -2 0

Ta le 2 — Appro ed rim contour

Nom inal tyr se tion width

Appro ed rim s

a,b,c

Metric 5 and 5 series

13

14

15

16

17

18

19

20

MT3.7 ; MT4.0

MT4.0 ; MT4.5

MT4.5 ; MT5.0

MT4.5 ; MT5.0

MT5.0 ; MT5.5

MT5.5 ; MT6.0

MT5.5 ; MT6.0

MT6.0 ; MT6.25; MT6.5

Metric 6 and 7 series

10

1 0

1 0

13

14

15

16

17

18

( 2.5 ); ( MT2.5 ); 2.7 ; MT2.7 ; MT3.0

( 2.5 ); ( MT2.5 ); ( 2.7 ); ( MT2.7 ); MT3.0 ; MT3.5

( MT2.7 ); ( MT3.0 ); MT3.5 ; MT3.7

( MT3.0 ); MT3.5 ; MT3.7 ; MT4.0

( MT3.5 ); ( MT3.7 ); MT4.0 ; MT4.5

( MT3.5 ); ( MT3.7 ); MT4.0 ; MT4.5

( MT3.7 ); ( MT4.0 ); MT4.5 ; MT5.0

( MT4.0 ); MT4.5 ; MT5.0 ; MT5.5

( MT4.5 ); MT5.0 ; MT5.5

Metric 8 , 9 and 10 series

6

7

8

9

10

1 0

1 0

13

d

14

15

16

( 1.20); 1.4 ; 1.5 ; 1.6

( 1.4 ); ( 1.5 ); ( MT1.5 ); 1.6 ; MT1.6 ; 1.8 ; MT1.8 ;

( 1.6 ); 1.8 ; 2.15; MT 1.8 ; MT2.15

( 1.8 ); 2.15; 2.5 ; ( MT1.8 ); MT2.15; MT2.5

( 2.15); 2.5 ; 2.7 ; ( MT2.15); MT2.5 ; MT2.7

( 2.15); 2.5 ; 2.7 ; ( MT2.15); MT2.5 ; MT2.7 ; MT3.0

( 2.5 ); 2.7 ; ( MT2.5 ); MT2.7 ; MT3.0

( 2.5 ); ( 2.7 ); ( MT2.5 ); ( MT2.7 ); MT3.0 ; MT3.5

( 2.7 ); ( MT2.7 ); ( MT3.0 ); MT3.5 ; MT3.7

( MT3.0 ); MT3.5 ; MT3.7 ; MT4.0

( MT3.5 ); MT3.7 ; MT4.0 ; MT4.5

a

Recommen ed rims are the me suring rims

b

Care should b taken not to fi motor ycle tyres to rims desig ned for tyres for other ty es of service (e.g p s eng er

car or ag ricultural tyres) Cy lin rical b ad se t rims are for tub -ty pe ty res only

c

Rims wihin p rentheses are p rmi ed for diag onal ply an bias b lted tyres only

d

For tyre size 1 0/90-1 , a 3.0 D rim ( se ISO 6 5 -2) is p rmi ed for motor ycles wih a ma imum sp ed up

to 5 km/ h

1999

ISO 5751-3:

1999

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