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Old 09-28-2005, 14:01   #1 (permalink)
Tire Guy
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Tire Pressure

I just put a new set of Michelin Harmonies on my 2004 Taurus.

The tires have a max PSI of 44 listed on the sidewall.

Ford recommends a max PSI of 30 for tires on this car.

How much pressure should I use in practice? Car typically doesn't haul any
heavy loads.

TIA


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Old 09-28-2005, 14:02   #2 (permalink)
SC Tom
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Re: Tire Pressure


"Tire Guy" <tire@guy.org> wrote in message
news:45OdnXgrrdp_d6feRVn-vw@adelphia.com...
>I just put a new set of Michelin Harmonies on my 2004 Taurus.
>
> The tires have a max PSI of 44 listed on the sidewall.
>
> Ford recommends a max PSI of 30 for tires on this car.
>
> How much pressure should I use in practice? Car typically doesn't haul
> any heavy loads.
>
> TIA
>


Go with the Ford recommendation (whatever's on the door post.)
SC Tom


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Old 09-28-2005, 18:01   #3 (permalink)
Backyard Mechanic
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Re: Tire Pressure

"Tire Guy" <tire@guy.org> wrote in
news:45OdnXgrrdp_d6feRVn-vw@adelphia.com:

> I just put a new set of Michelin Harmonies on my 2004 Taurus.
>
> The tires have a max PSI of 44 listed on the sidewall.
>
> Ford recommends a max PSI of 30 for tires on this car.
>
> How much pressure should I use in practice? Car typically doesn't
> haul any heavy loads.
>
> TIA
>
>


ARE you SURE the Ford listing is MAX tire pressure?
There's a big difference.

The Tire listing means exactly that. The tiremaker knows the design limits
of the tire.. but he has no idea for certain what vehicle it might be used
on.

The Car Mfr recommends the best pressure for load, economy/wear and
handling. And has NO way of knowing what aftermarket tire MAX might be.

HOWEVER - as you may know, different tire designs may handle differently
and work/ride/wear better at slightly higher or lower pressure so it should
be used as a general guide.





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Old 09-28-2005, 19:01   #4 (permalink)
Backyard Mechanic
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Re: Tire Pressure

Backyard Mechanic <pettyfog@yaywho.com> wrote in
news:Xns96DFD2E89135Bpettyfogery@207.115.63.158:

> "Tire Guy" <tire@guy.org> wrote in
> news:45OdnXgrrdp_d6feRVn-vw@adelphia.com:
>
>> I just put a new set of Michelin Harmonies on my 2004 Taurus.
>>
>> The tires have a max PSI of 44 listed on the sidewall.
>>
>> Ford recommends a max PSI of 30 for tires on this car.
>>
>> How much pressure should I use in practice? Car typically doesn't
>> haul any heavy loads.
>>
>> TIA
>>
>>

>
> ARE you SURE the Ford listing is MAX tire pressure?
> There's a big difference.
>
> The Tire listing means exactly that. The tiremaker knows the design
> limits of the tire.. but he has no idea for certain what vehicle it
> might be used on.
>
> The Car Mfr recommends the best pressure for load, economy/wear and
> handling. And has NO way of knowing what aftermarket tire MAX might
> be.
>
> HOWEVER - as you may know, different tire designs may handle
> differently and work/ride/wear better at slightly higher or lower
> pressure so it should be used as a general guide.
>


Hmmm... just happened to think..maybe that's why tires have a speed
rating code instead of actually just LISTING the speed limitations, eg
130MPH..
;)
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Old 09-28-2005, 20:01   #5 (permalink)
BradandBrooks
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Re: Tire Pressure


"Tire Guy" <tire@guy.org> wrote in message
news:45OdnXgrrdp_d6feRVn-vw@adelphia.com...
>I just put a new set of Michelin Harmonies on my 2004 Taurus.
>
> The tires have a max PSI of 44 listed on the sidewall.
>
> Ford recommends a max PSI of 30 for tires on this car.
>
> How much pressure should I use in practice? Car typically doesn't haul
> any heavy loads.
>
> TIA
>


What? Where the hell does Ford recommend 30psi? Go with what the tires say,
44psi, or, of course, you can always just blow a tire and die if you like.

Brad


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Old 09-28-2005, 21:01   #6 (permalink)
mcalister
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Re: Tire Pressure


"BradandBrooks" <BradandBrooks@shaw.ca> wrote in message
news:gaI_e.278470$Hk.165483@pd7tw1no...
>
> "Tire Guy" <tire@guy.org> wrote in message
> news:45OdnXgrrdp_d6feRVn-vw@adelphia.com...
>>I just put a new set of Michelin Harmonies on my 2004 Taurus.
>>
>> The tires have a max PSI of 44 listed on the sidewall.
>>
>> Ford recommends a max PSI of 30 for tires on this car.
>>
>> How much pressure should I use in practice? Car typically doesn't haul
>> any heavy loads.
>>
>> TIA
>>

>
> What? Where the hell does Ford recommend 30psi? Go with what the tires
> say, 44psi, or, of course, you can always just blow a tire and die if you
> like.
>
> Brad
>

Ford designed the automobile, therefore they know what pressure is required
(they depend on quality tires, unlike the Firestones a few years ago).
The max pressure listed on the tire is just that - the maximum psi that can
safely be used. The tire manufacturer does not care about the handling or
ride comfort. Go with the Ford recommendation.


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Old 09-28-2005, 21:01   #7 (permalink)
C. E. White
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Re: Tire Pressure

"BradandBrooks" <BradandBrooks@shaw.ca> wrote in message
news:gaI_e.278470$Hk.165483@pd7tw1no...

> What? Where the hell does Ford recommend 30psi? Go with what the tires
> say, 44psi, or, of course, you can always just blow a tire and die if you
> like.


This is a terrible recommendation. Assuming the new tires are of the same
size and load rating as were supplied on the car, you should follow the
vehicle manufacturer's recommendation. Michelin has the following to say
(see http://www.Michelin.com/care/tip1.html ):

"Recommended Pressure

"Always inflate your tires to the recommended pressure listed by your
vehicle's manufacturer. This information can be found in the owner's manual
and often on a placard located in the vehicle's door jamb, inside the fuel
hatch, or on the glove compartment door."

This is a recommendation for US drivers. P Series tires with a 44 psi
recommendation are not rated to carry a higher load than other P series
tires of the same size with the same load rating which may only have a 35
psi maximum pressure rating . The higher maximum pressure is to allow
vehicle manufacturers to recommend higher pressures for higher speeds. The
spec sheet for Harmony tires includes the following additional
recommendation (http://www.michelinman.com/assets/pdfs/doc_harmony.pdf):

"For high-speed driving, additional inflation pressure and possibly reduced
tire loading and/or upsizing is required. In the absence of specific
recommendations by the vehicle manufacturer, use the following guidelines
based on those in the European Tyre and Rim Technical Organization Standards
Manual.

For speeds over 160 km/h (100 mph), load and inflation must be adjusted
according to the table below.
S-Speed Rated Sizes:
Maximum Speed (mph) 100 106 112
Inflation Increase (psi) 0.0 1.0 2.0
Load Capacity (% of max.) 100 100 100
T-Speed Rated Sizes:
Maximum Speed (mph) 100 106 112 118
Inflation Increase (psi) 0.0 1.0 2.0 3.0
Load Capacity (% of max.) 100 100 100 100

Of course, since US speed limits are much less than 100 mph, these
recommendation in theory only apply to certain European countries (Germany).

Regards,

Ed White


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Old 09-28-2005, 22:01   #8 (permalink)
Eric Toline
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Re: Tire Pressure


Tire Pressure

Group: alt.autos.ford Date: Wed, Sep 28, 2005, 3:11pm From: tire@guy.org
(Tire Guy)
I just put a new set of Michelin Harmonies on my 2004 Taurus.
The tires have a max PSI of 44 listed on the sidewall.
Ford recommends a max PSI of 30 for tires on this car.
How much pressure should I use in practice? Car typically doesn't haul
any heavy loads.
TIA <<<<<<<<<<<<<<<<<<<

Remember that the PSI should be taken when the tire is cold. A hot tire
will show 2-4 lbs more pressure. Personally I think you should set the
cold pressure to 32lbs if you want a slightly firmer ride.

Eric

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Old 09-29-2005, 13:05   #9 (permalink)
xmirage2kx
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Re: Re: Tire Pressure

"Arielo" wrote:
> "Tire Guy" <tire@guy.org> wrote in message
> news:45OdnXgrrdp_d6feRVn-vw@adelphia.com...
> >I just put a new set of Michelin Harmonies on my 2004 Taurus.
> >
> > The tires have a max PSI of 44 listed on the sidewall.
> >
> > Ford recommends a max PSI of 30 for tires on this car.
> >
> > How much pressure should I use in practice? Car typically

> doesn't haul
> > any heavy loads.
> >
> > TIA
> >

>
> What? Where the hell does Ford recommend 30psi? Go with what
> the tires say,
> 44psi, or, of course, you can always just blow a tire and die
> if you like.
>
> Brad


tires get hot and pressure raises. you dont want to put 44psi in a
cold tire then drive it and have the pressure raise to 55psi. on the
door it will say what is recomended, use that. then you can play with
it alittle to get the comfort you want (+-3-5psi)

--
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Articles individually checked for conformance to usenet standards
Topic URL: http://www.autoforumz.com/Ford-Mecur...ict140137.html
Visit Topic URL to contact author (reg. req'd). Report abuse: http://www.autoforumz.com/eform.php?p=678413
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Old 09-29-2005, 14:01   #10 (permalink)
351CJ
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Posts: n/a
Re: Re: Tire Pressure


"xmirage2kx" <UseLinkToEmail@AutoForumz.com> wrote in message
news:1_678413_da776c196f772720f173cf1e626a2a03@autoforumz.com...
> "Arielo" wrote:
> > "Tire Guy" <tire@guy.org> wrote in message
> > news:45OdnXgrrdp_d6feRVn-vw@adelphia.com...
> > >I just put a new set of Michelin Harmonies on my 2004 Taurus.
> > >
> > > The tires have a max PSI of 44 listed on the sidewall.
> > >
> > > Ford recommends a max PSI of 30 for tires on this car.
> > >
> > > How much pressure should I use in practice? Car typically

> > doesn't haul
> > > any heavy loads.
> > >
> > > TIA
> > >

> >
> > What? Where the hell does Ford recommend 30psi? Go with what
> > the tires say,
> > 44psi, or, of course, you can always just blow a tire and die
> > if you like.
> >
> > Brad

>
> tires get hot and pressure raises. you dont want to put 44psi in a
> cold tire then drive it and have the pressure raise to 55psi. on the
> door it will say what is recomended, use that. then you can play with
> it alittle to get the comfort you want (+-3-5psi)


For tires pressures are "When Cold", so what the pressure rises to when hot
is not really part of the equation.

FYI:
My 2005 F-450's tires are filled to 95 PSI as per both the tire sidewall and
the Ford door plate.


>
> --
> Posted using the http://www.autoforumz.com interface, at author's request
> Articles individually checked for conformance to usenet standards
> Topic URL:
> http://www.autoforumz.com/Ford-Mecur...ict140137.html
> Visit Topic URL to contact author (reg. req'd). Report abuse:
> http://www.autoforumz.com/eform.php?p=678413



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