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Car Forum / BMW Cars / March 2008

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2001 325Ci tire questions

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Uncle_vito - 21 Mar 2008 05:05 GMT
My 2001 325Ci convertible comes with Michelin MXM 91W tires in size
225/45R17.  Car still has OEM supplied tires except for two replacements due
to tire damage.  Car mileage is 39000 miles (low).  I just had my 3rd tire
fail.

These are low profile tires and I have had unexpected loss of air a total of
3 times in the life of the car.  Each time the tire was destroyed and have
been replaced twice.  They have been replaced with the OEM type tire at a
cost of $275 a pop.

Two questions:

1) Why are these tires being damaged like this?  Is it the low profile?   Is
air pressure critical where sidewall wear can result if the tires are even
slightly underinflated?  I think folks with low profile tires like these can
help answer this question.  To my knowledge there have been no pothole or
curb encounters.

2)  I believe that if I replaced all 4 tires at the same time, there is
likely a tire that is much better than OEM, and at the same time more
cheaply priced, that I could buy.  By having only one tire to replace at a
time, I feel I am captured into buying the OEM type tires at a substantial
price.  Comments?  Are there other tires in this size that are less
expensive with equivalent or better performance for the simple grocery
getter driving that I do?

Thanks for any and all replies.

Vito
Floyd Rogers - 21 Mar 2008 06:43 GMT
> My 2001 325Ci convertible comes with Michelin MXM 91W tires in size
> 225/45R17.  Car still has OEM supplied tires except for two replacements
[quoted text clipped - 13 lines]
> these can help answer this question.  To my knowledge there have been no
> pothole or curb encounters.

If you lose air, the low profile is pretty much guaranteed to cause
complete failure even if you immediately drive to the side of the road.
Only if it goes flat while parked and you notice and don't drive on
them are you going to save them.

> 2)  I believe that if I replaced all 4 tires at the same time, there is
> likely a tire that is much better than OEM, and at the same time more
[quoted text clipped - 3 lines]
> expensive with equivalent or better performance for the simple grocery
> getter driving that I do?

I had them for a while (bought a wheel/tire set); they're not bad, but
others are far cheaper and just as good.  For instance, many people
(me included) like Goodyear F1 GS-D3.  They're better in the rain,
the same or perhaps a little better in the dry, and much cheaper -
about $150.  There are other options, too, look back in the archive
and search for "GS-D3 Car & Driver" or look on the C&D website.

FloydR
Tom K. - 21 Mar 2008 14:51 GMT
>> My 2001 325Ci convertible comes with Michelin MXM 91W tires in size
>> 225/45R17.  Car still has OEM supplied tires except for two replacements
[quoted text clipped - 13 lines]
>> these can help answer this question.  To my knowledge there have been no
>> pothole or curb encounters.

Are you certain the wheels haven't sustained some damage?

> If you lose air, the low profile is pretty much guaranteed to cause
> complete failure even if you immediately drive to the side of the road.
[quoted text clipped - 15 lines]
> about $150.  There are other options, too, look back in the archive
> and search for "GS-D3 Car & Driver" or look on the C&D website.

I had the MXMs on a Z3, and feel that both the F1 GS-D3 and Continental
SportContact are better performance tires.

Tom K.
Uncle_vito - 21 Mar 2008 15:42 GMT
>>> My 2001 325Ci convertible comes with Michelin MXM 91W tires in size
>>> 225/45R17.  Car still has OEM supplied tires except for two replacements
[quoted text clipped - 15 lines]
>
> Are you certain the wheels haven't sustained some damage?

I have checked the wheel and luckily, it is fine.  These tires have stiff
rubber near the beads and fit very tightly to the rim.  This had protected
the rims in past losses of air.

>> If you lose air, the low profile is pretty much guaranteed to cause
>> complete failure even if you immediately drive to the side of the road.
>> Only if it goes flat while parked and you notice and don't drive on
>> them are you going to save them.

I am going to pay more attention to the tire air pressure.  In most of the
past cases, I know the cause of tire failure but in this case I do not.  I
can see what I believe to be previous wear on the edge of the tread of this
most recent failure.  I suspect that the tire was low on air and I did not
know this.  This resulted in rapid wear which eventually caused the tire to
fail.  Obviously, I am going to get my act together to ensure that this
doesn't happen again.

>>> 2)  I believe that if I replaced all 4 tires at the same time, there is
>>> likely a tire that is much better than OEM, and at the same time more
[quoted text clipped - 15 lines]
>
> Tom K.

I think I am going to ditch the Michelins and go with Goodyear.  I am not a
performance driver and this car is driven by my wife.  I have my eyes on the
GY Eagle F1 All Season that I can get for $175/tire.

Thanks for all replies and I am still open to all advice and suggestions.

Vito
Scott Dorsey - 21 Mar 2008 14:32 GMT
>These are low profile tires and I have had unexpected loss of air a total of
>3 times in the life of the car.  Each time the tire was destroyed and have
[quoted text clipped - 8 lines]
>help answer this question.  To my knowledge there have been no pothole or
>curb encounters.

You don't know WHY there is the unexpected loss of air.  Either you have
a puncture, loss of the bead, or a valve failure.  Any one of these could
be at fault.  What you do know is that once there is that loss, the tire
is instantly shredded, which is typical of a low-profile type.  Because it
gets shredded, you have no way to figure out what the original failure was.

>2)  I believe that if I replaced all 4 tires at the same time, there is
>likely a tire that is much better than OEM, and at the same time more
[quoted text clipped - 3 lines]
>expensive with equivalent or better performance for the simple grocery
>getter driving that I do?

Yes, there are plenty of good tires available.  Check the folks at
tirerack.com for what has been recommended in that size, assuming you
don't want to change from a low profile type.
--scott
Signature

"C'est un Nagra.  C'est suisse, et tres, tres precis."

Mike G - 21 Mar 2008 15:26 GMT
> My 2001 325Ci convertible comes with Michelin MXM 91W tires in
> size 225/45R17.  Car still has OEM supplied tires except for
[quoted text clipped - 25 lines]
>
> Thanks for any and all replies.

I can't think it's the make of tyre that is the problem, or the
fact that they are low profile. but FWIW I have Contisport
Contact tyres fitted to my 528i. 2off 235/45/17 fronts, and 2off
255/40/17 rears.
So far I've not had any problems with unexpected air loss.

Maybe you should bite the bullet and replace 2 tyres with a
different make if it happens again. Keeping the good tyre as a
replacement if it happens again to one of the remaining original
ones.
Mike.
UK.
Pete - 21 Mar 2008 16:59 GMT
> These are low profile tires and I have had unexpected loss of air a
> total of 3 times in the life of the car.

If you're certain that the rim is not damaged (and this is not
necessarily visible with a naked eye), then my guess is that you picked
up a nail or screw which caused gradual loss of pressure.  Since
underinflation is not easily spotted in low profile tires, you probably
did not notice it and kept on driving until the sidewalls got damaged.
Make it a habit of checking your tire pressure once a week (when tires
are cold).

Do you leave near or drive by a construction site by any chance?

> 2)  I believe that if I replaced all 4 tires at the same time, there
> is likely a tire that is much better than OEM, and at the same time
> more cheaply priced, that I could buy.  By having only one tire to
> replace at a time, I feel I am captured into buying the OEM type tires
> at a substantial price.  Comments?

Definitely, especially if you buy them from the dealer, you're getting
raped.  Besides, most stuff that Michelin makes is overpriced and
mediocre at best.  Only the top of the line Michelins are OK (Pilot
Sport PS2), but still extremely expensive.

If you're on a budget, I'd go with Yokohama Avid W4S - $104 from
tirerack.  GY F1 GSD3 is also excellent, but for the type of driving
that your wife does, I'd say it's overkill and it will wear out too
fast.

Good luck!

Pete

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