1
24nTire re p la c e m e n t
To m a inta in g ood h a nd ling a nd ve hic le
re s p ons e , u s e o nly tire s o f a s ingle
tre a d c onfigura tio n fro m a s ingle m a nu-
fa c tu re r. B MW te s ts a nd a p p ro ve s
whe e l/tire c om b ina tio ns . R e fe r to
p a ge 1 28.
p ra c tic e s a nd d iffe re nc e s in ro a d
c ha ra c te ris tic s a nd c lim a te .
Gra d e C c orre s p ond s to a le ve l o f p e r-
form a nc e w hic h a ll p a s s e nge r c a r tire s
m us t m e e t u nd e r th e Fe d e ra l Mo to r
Ve hic le S a fe ty S ta nd a rd No . 109.
Gra d e s B a nd A re p re s e nt h ighe r le ve ls
of p e rfo rm a nc e o n th e la b ora to ry te s t
whe e l th a n th e m inim um re q uire d b y la w.
Tra c tio n
The tra c tio n g ra d e s , fro m h ighe s t to
lowe s t, a re AA, A, B , a nd C .
Thos e g ra d e s re p re s e nt th e tire 's a b ility
to s to p o n w e t p a ve m e nt a s m e a s ure d
und e r c ontro lle d c ond itio ns o n s p e c i-
fie d g ove rn m e nt te s t s urfa c e s o f a s -
p ha lt a nd c onc re te . A tire m a rke d C
m a y h a ve p oor tra c tio n p e rfo rm a nc e .
DO T Qu a lity Gra d e s
The te m p e ra tu re g ra d e fo r th is tire
is e s ta b lis he d fo r a tire th a t is p ro p -
e rly in fla te d a nd n ot o ve rlo a d e d . Exc e s -
s ive s p e e d , u nd e rinfla tio n, o r e xc e s s ive
loa d ing, e ith e r s e p a ra te ly o r in c om b ina -
tio n, c a n c a us e h e a t b uild up a nd p os s i-
b le tire fa ilure .<
Tre a d we a r
Tra c tio n AA A B C
Te m p e ra tu re A B C
In a d d itio n to th e tire g ra d e s lis te d
a b ove , a ll p a s s e nge r c a r tire s m us t
c onform to Fe d e ra l S a fe ty R e q uire -
m e nts a s w e ll.<
The tra c tio n g ra d e a s s igne d to
th is tire is b a s e d o n s tra ight-
a he a d b ra kin g tra c tio n te s ts , a nd
d oe s n ot in c lud e a c c e le ra tio n, c orn e r-
ing, h yd ro p la ning, o r p e a k tra c tio n
c ha ra c te ris tic s .<
Un ifo rm Tire Qu a lity Gra d in g
Tre a d w e a r
Qua lity g ra d e s c a n b e fo und w he re
a p p lic a b le o n th e tire s id e wa ll b e tw e e n
tre a d s hould e r a nd m a xim um s e c tio n
wid th . Fo r e xa m p le :
The tre a d we a r g ra d e is a c om p a ra tive
ra tin g b a s e d o n th e w e a r ra te o f th e tire
whe n te s te d u nd e r c ontro lle d c ond i-
tio ns o n a s p e c ifie d g ove rn m e nt te s t
c ours e .
Te m p e ra tu re
The te m p e ra tu re g ra d e s a re A (th e high- Tre a d w e a r 2 00 Tra c tio n AA
e s t), B , a nd C , re p re s e ntin g th e tire 's re - Te m p e ra tu re A
s is ta nc e to th e g e ne ra tio n o f h e a t a nd
Fo r e xa m p le , a tire g ra d e d 1 50 w ould
we a r o ne a nd o ne -ha lf (1-1/2) tim e s a s
its a b ility to d is s ip a te h e a t w he n te s te d
Do not u s e re tre a d e d tire s ("c a p s ").
we ll on th e g ove rn m e nt c ours e a s a tire und e r c ontro lle d c ond itio ns o n a s p e c i-
gra d e d 1 00. Th e re la tive p e rfo rm a nc e fie d in d oor la b ora to ry te s t w he e l.
of tire s d e p e nd s u p on th e a c tu a l c ond i- S us ta ine d h igh te m p e ra tu re c a n c a us e
Drivin g s a fe ty m a y b e im p a ire d b y
th e ir u s e . Th is d ue to th e p os s ib le va ria -
tio ns in c a s ing s tru c tu re s a nd , in s om e
c a s e s , to th e ir e xtre m e a ge , fa c to rs
whic h c a n le a d to a d e c re a s e in th e ir
tio ns o f th e ir u s e , h owe ve r, a nd m a y
d e p a rt s ignific a ntly fro m th e n orm d ue
to va ria tio ns in d rivin g h a b its , s e rvic e
th e tire m a te ria l to d e ge ne ra te a nd re -
d uc e tire life , a nd e xc e s s ive te m p e ra -
tu re c a n le a d to s ud d e n tire fa ilure . Th e d ura b ility.<
Online Edition for Part No. 01 41 0 155 048 - © 01/00 BMW AG
| Categories | BMW 3-Series Manuals, BMW Manuals |
|---|---|
| Document Type | Free Auto PDF Owners Manual Download |
| Tags | BMW 323Cic, BMW E46 |
| Model Year | 2000 |
| Download File |
|
| Document File Type | |
| Wikipedia's Page | BMW 3-Series (E46) |
| Copyright | Attribution Non-commercial |
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