Bsi bs au 050 4 3 1a 1998 (iso 4250 3 1997)

BRITISH STANDARD AUTOMOBILE SERIES BS AU 50 4 3 1a 1998 ISO 4250 3 1997 Tyres and wheels — Part 4 Rim profiles and dimensions — Section 3 Off the road rims — Subsection 3 1a Specification for narrow a[.]

ISO 4250-3:

ICS 4 0 0.5

This Bri sh Stan ard, ha ing

b en pre ared u der the

directon of the Eng ine ring

Sector Bo rd, was published

u der the authoriy of the

Stan ards Bo rd an comes

into efect on

1 J n ary 1 9

© BSI 0 -1 9

ISBN 0 5 0 2 4 8 8

This British Stand rd reproduces v erb tim ISO425 -3:19 7 and implements

it as the UK national stand rd It super edes BSAU5 -4-3.1:19 1, which is

withd rawn

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

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Catalog ue

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

f om leg al o l g ations

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, p g es1 to 1 an 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

© BSI 0 -1 9

i

Pag e

Annex A ( informativ e) Sealng ring g ro v es and O-ring s for

© BSI 0 -1 9

Foreword

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

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

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

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

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

International org anizations, g ov ernmental and non-g ov ernmental, in laison with

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

Electrotech ical Commis ion ( IEC) on al mat er of electrotechnical

stand rd ization

Draft International Stand ard s a opted b the tech ical commit e s are cir ulated

to the member bodies for v oting Publcation as an International Stand ard requires

a prov al b at least7 % of the member bod ies casting a v ote

International Stand rd ISO425 -3 was prep red b Tech ical Commit e

ISO/TC31, Tyr es, r ims a nd va lve , S bcommit e SC6, Off-the-r oa d tyr es a nd

r ims

This second edition cancels and replaces the fir t edition ( ISO425 -3:19 7), of

which it constitutes a technical rev ision

ISO 425 consists of the fol owing p rts, under the g eneral title Ea r th-mo er tyr es

a nd r ims:

— Pa r t 1: Tyr es d esigna tions a nd d imensions;

— Pa r t 2: Loa d s a nd infla tion pr es ur es;

— Pa r t 3: R ims

Annex A of this p rt of ISO425 is for information only

Desc iptors: Sie e uipment, self-pro eled machines, e rth-mov ing e uipment, rims, dimensions,

desig naton

© BSI 0 -1 9

1

1 Scope

ISO 425 consists of thre p rts ( se the Foreword)

lay ing down the tech ical elements relating to

d esig nation an d imensions of ty res an rims for

earth-mov ing machinery : it also g iv es loa ta les for

these ty res

This p rt of ISO 425 sets out the desig nation,

contour an dimensions for rims for nar ow and

wide b se of-road ty res primari y intend ed for

earth-mov ing machinery

Annex A g iv es detai s of seal ng ring g ro v es an

O-ring s for earth-mov er rims

NOT Terms used are in ac ordance wih ISO 3 1 :1 7 ,

Whe ls/ r ims — Nomenclatur e, d esig aton, mar kin a d u is of

measur ement

2 Rim identification

2.1 Codes shal be used to identify :

a) specified rim d iameter, D ( se Ta le 6);

b) nominal width betwe n flang es;

c) nominal flang e heig ht or rim profi e

d esig nations

2.2 The rim marking shal consist of codes for:

a) specified rim d iameter, D ;

b) nominal width betwe n flang es

The marking s shal be on the weather side of the rim

an v isible when the ty re is mounted on the rim

W here a d isk is fit ed b the rim/ whe l

man facturer, the marking shal a pear on either

the dis or rim b se

Lo se flang es shal be marked on an externaly

v isible sur ace The marking shal ind icate nominal

heig ht and nominal diameter

3 Rim contours

Rim contour are g iv en in Fig ure 1 to Fig ure 5 and

Ta le 1 to Ta le 5

4 Rim knurl ng

Rim k urlng d etai s are g iv en in Fig ure 6 and

Ta le 6

5 Rim loads and inflation pres ures

The loa and inflation pres ure imposed on the rim

and whe l shal not exce d the rim an whe l

man facturer’s recommend tions, ev en thoug h the

ty re ma be a prov ed for a hig her loa or inflation

pres ure Consult the rim and whe l man facturer

to determine if rim an whe l ca acities are

ad eq uate for the intend ed serv ice

Rim dimensions are stand rdiz d for siz and

contour only , and for p rticular ty re and rim

combinations desig nated to ensure proper mou ting

and fit of the ty re to the rim

© BSI 0 -1 9

NOT 1 The fig ure a plies to rim diameter codes 2 , 2 , 3 , 3 , 3 ,4 , 4 , 4 , 5 an 5 (Se Ta le 7 for sp cified rim diameter.)

NOT 2 Flang e an b ad se t shal b remo a le on one side

Fig ure 1 — Contour of 5° ful ta ered bea seat rim s

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3

Ta le 1 — Contour of5° ful ta ered bea seat rim s

Dimensions in milimetres

Rim width co e/flange

height co e

2

±1

13.0 / 2.7

a

a

For rim diameter code > 4

© BSI 0 -1 9

Ta le 2 — Contour of 5° ful tapered bea seat rim s

NOT 1 This fig ure a plies to rim diameter code 2 ( se Ta le 7 for sp cified rim diameter )

NOT 2 Flang e an brad se t shal b remov able on one side

Fig ure 2 — Contour of 5° ful ta ered bea seat rim s

Dimensions in milimetres

Rim width co e/flange

heig ht co e

2

R

3

© BSI 0 -1 9

5

Ta le 3 — Contour of sem i- dro - centre rim s

NOT 1 This fig ure a plies to rim diameter codes 2 an 2 ( se Ta le 7 for sp cified rim diameter)

NOT 2 Flang e an b ad se t shal b remo a le on one side

Fig ure 3 — Contour ofsem i- drop- centre rim s

Dimensions in milimetres

Rim width

co e/flang e heig ht

co e

2

Rim diam ete

co e

8.0 TG SDC

10.0 V A SDC

1 0 / 1.3 SDC

14.0 / 1.3 SDC

20

25

3 5

3 5,5

±3,5

±5

±6,5

±6,5

3 ,5

4

3

3

17,5

25,5

25,5

25,5

4

5

4

4

6,5

1

7

7

16,5

23

23

23

24

24

25

25

© BSI 0 -1 9

Table 4 — Contour of 15° dro -c ntre rim s

NOT This fig ure a plies to rim diameter codes 5 ,5 an 5 ,5 ( se Ta le 7 for sp cified rim diameter )

Fig ure 4 — Contour of15° dro -c ntre rim s

Dimensions in milimetres

Rim width co e

H a

L a

2 R

3 R

4 R

5 a

a

These dimensions comprise the minimum wel env lo e for tyre mou tng purp ses of dimension Q

© BSI 0 -1 9

7

Table 5 — Contour of 5° dro - centre rim s

NOT The fig ure a plies to rim diameter codes 2 an 2 (se Ta le 7 for sp cified rim diameter )

Fig ure 5 — Contour of5° drop-c ntre rim s

Dimensions in milimetres

Rim width

co e flange

heig ht co e

R

1 R

2 R

3 R

4 R

5

Rim

diam ete

co e

3 +

0

© BSI 0 -1 9

Ta le 6 — K nurl ng widths for rim Figure 6 — Transver e k url ng detai s

Dimensions in milimetres

Rim width co es

K nurlng width

Fix ed flang e side Remov able flang e side

a) Rim d iameter codes 25 to 4

3 min

b) Rim diameter codes 51 an larg er

© BSI 0 -1 9

9

Ta le 7 — Earth- m over spe ified rim

diam eter

Rim diam ete co es

S e ified diam ete , D

mm

© BSI 0 -1 9

Annex A (informa tive)

Sea ling ring g rooves a nd O- ring s for

ea rth- mover rims

© BSI 0 -1 9

1

Dimensions in milimetres

Rim siz

Pro osed

O-ring

designation D

B

; D

B

1 D

R

; D

R

T

2

!

L

1 -20 SDC

ma

6 1,2 1 8 8,8

10.0 -25/1.5

14.0 -25/1.5

17.0 -25/1.7

1 0 -25/ 1.3 SDC

14.0 -25/ 1.3 SDC

1 25-25

13.0 -25

15.0 -25

16.0 -25

17.0 -25

19.5 -25

20.0 -25

– 2,4

+ 1,2

– 2,4

124 ,63916,3 2,4

OR 4 1

NOT O-ring size, sha e an pro ertes should prov ide a lastng p si v se l

+ 2

0

50-4-3.1a:1998

ISO 4250-3:

1997

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