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Cooper STT's - best pressure...?
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JF Lux
 


Member Since: 08 Sep 2007
Location: A little country in Europe
Posts: 3522

Luxembourg 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3
Cooper STT's - best pressure...?

Simple question (I hope...)

Any recommendations on best tyre pressure for 17" Cooper STT's ? They are curerntly at 3 bar / 45 psi but that seems high. Was thinking 2.4 bar / 35 psi.

To be used now (not sand etc) - road, bit of mud/soft ground and driving on forested tracks for this weekend.

Thanks.
 The next American ex-pat that calls it a "truck" is going to find out what 2.7 tons feels like on their foot...

Club "yes, I too have had the EGR's replaced..."
Club "yes, I too have had the compressor replaced..."
Club "yes, I too once had the car at the dealer for a couple of weeks nearly 4 weeks over 4 weeks...5 weeks"
Club "yes, I too have had EPB failure..."
Club "yes, I too get mysterious bings and bongs..." 
 
Post #46697614th May 2009 8:21 am
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Slimer
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Member Since: 06 Jan 2005
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United Kingdom 

Back when I ran STTs standard LR pressures seemed fine
 The End  
Post #46698514th May 2009 8:35 am
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DiscoDunc
 


Member Since: 08 May 2006
Location: Bristol
Posts: 16390

England 2010 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

I use std pressure on mine and ran fine.

reduced the pressure on one day when I did the Croisiere Blanc and too be honest, didnt notice any difference.
 Duncan
-----------------------------------------------------
If I'd known I was going to be so thirsty this morning I'd have drunk more beer last night.
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Post #46703814th May 2009 10:19 am
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JF Lux
 


Member Since: 08 Sep 2007
Location: A little country in Europe
Posts: 3522

Luxembourg 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Thumbs Up

Standard it now is.
 The next American ex-pat that calls it a "truck" is going to find out what 2.7 tons feels like on their foot...

Club "yes, I too have had the EGR's replaced..."
Club "yes, I too have had the compressor replaced..."
Club "yes, I too once had the car at the dealer for a couple of weeks nearly 4 weeks over 4 weeks...5 weeks"
Club "yes, I too have had EPB failure..."
Club "yes, I too get mysterious bings and bongs..." 
 
Post #46704414th May 2009 10:40 am
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mehari
 


Member Since: 14 Dec 2005
Location: somewhere in Belgium and often in Brittany
Posts: 91

Belgium 2008 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

STT are soft edge tyres, they always look slightly under inflated. I go for around 3 bars to avoid too much wearing...

Ben
 A second D3 ! This time with all whistles and bells (Auto, 7seats, Diff Lock, RAI, all kinds of protections, winch, Extended range tank, iPod adapter....)
First time twice the same car ! and first time third car of the same brand !

I'm loving it ! 
 
Post #46706814th May 2009 11:56 am
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CFB
 


Member Since: 02 Dec 2005
Location: Bradford, West Yorkshire
Posts: 6100

United Kingdom 

Running my new 255/70/17 AT2's at 34 front and 37 rear i.e. 1 up from standard, seem fine at this although fronts look a little saggy but put that down to the slight oversize.
 2020 BMW X1 18d XDrive X-Line Auto  
Post #46720214th May 2009 5:05 pm
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ronp
 


Member Since: 29 Nov 2006
Location: North Yorkshire
Posts: 15214

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

That's the same pressures I've run all my tyres on the D3, Andy.
Wrangler HP's, Conti Cross Contacts, Grabber UHP's, STT's, MTR's & LTZ's.
Never had any uneven tread wear.
Thumbs Up
 I was a normal heterosexual chap, but in these new woke awakenings I now identify as a Wardrobe.  
Post #46720314th May 2009 5:10 pm
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JF Lux
 


Member Since: 08 Sep 2007
Location: A little country in Europe
Posts: 3522

Luxembourg 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

8 posts...



3 are mine...



4 different answers... Rolling Eyes



Laughing don't you just love this site... Laughing
 The next American ex-pat that calls it a "truck" is going to find out what 2.7 tons feels like on their foot...

Club "yes, I too have had the EGR's replaced..."
Club "yes, I too have had the compressor replaced..."
Club "yes, I too once had the car at the dealer for a couple of weeks nearly 4 weeks over 4 weeks...5 weeks"
Club "yes, I too have had EPB failure..."
Club "yes, I too get mysterious bings and bongs..." 
 
Post #46738914th May 2009 9:12 pm
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ronp
 


Member Since: 29 Nov 2006
Location: North Yorkshire
Posts: 15214

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

JF Lux wrote:
4 different answers...

I'd always trust the last ones JFL
Wink
 I was a normal heterosexual chap, but in these new woke awakenings I now identify as a Wardrobe.  
Post #46740114th May 2009 9:27 pm
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JF Lux
 


Member Since: 08 Sep 2007
Location: A little country in Europe
Posts: 3522

Luxembourg 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Well, to be honest, I think they have ended up at 35psi all round...so I haven't listened to anyone...

yet - until I get to a fuel station tomorrow...then I will have to decide who to believe... Laughing
 The next American ex-pat that calls it a "truck" is going to find out what 2.7 tons feels like on their foot...

Club "yes, I too have had the EGR's replaced..."
Club "yes, I too have had the compressor replaced..."
Club "yes, I too once had the car at the dealer for a couple of weeks nearly 4 weeks over 4 weeks...5 weeks"
Club "yes, I too have had EPB failure..."
Club "yes, I too get mysterious bings and bongs..." 
 
Post #46740914th May 2009 9:35 pm
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ronp
 


Member Since: 29 Nov 2006
Location: North Yorkshire
Posts: 15214

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

JF Lux wrote:
until I get to a fuel station tomorrow...then I will have to decide who to believe... Laughing


Word of Caution - don't beleive the guage at said fuel station.
 I was a normal heterosexual chap, but in these new woke awakenings I now identify as a Wardrobe.  
Post #46741414th May 2009 9:43 pm
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SJR
 


Member Since: 09 Aug 2006
Location: East Manchester
Posts: 4030

England 2006 Discovery 3 TDV6 SE Auto Arctic FrostDiscovery 3

The one thing i wouldn't believe is a fuel station tyre pressure gauge Laughing Thumbs Up
 I believe that every human has a finite number of heart-beats. I don't intend to waste any of mine running around doing exercises.
Buzz Aldrin (1930 - 
 
Post #46741614th May 2009 9:45 pm
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Bushwanderer
 


Member Since: 27 Nov 2007
Location: Northern Rivers, NSW, Australia
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Australia 2005 Discovery 3 TDV6 S Manual Buckingham BlueDiscovery 3

The "rule of thumb" is:
- check tyre pressures cold,
- take it for a run sufficient to bring tyres to operating temperature,
- check pressures of "hot" tyres.

The difference should be 4 psi. If less, the tyres are OVERPRESSURE, if more, tyres are UNDERPRESSURE.

HTH,
Peter

PS: Its best to have your own gauge for this test.
 The Bearded Dragon  
Post #46749915th May 2009 4:49 am
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JF Lux
 


Member Since: 08 Sep 2007
Location: A little country in Europe
Posts: 3522

Luxembourg 2008 Discovery 3 TDV6 HSE Auto Java BlackDiscovery 3

Bushwanderer wrote:
The "rule of thumb" is:
- check tyre pressures cold,
- take it for a run sufficient to bring tyres to operating temperature,
- check pressures of "hot" tyres.

The difference should be 4 psi. If less, the tyres are OVERPRESSURE, if more, tyres are UNDERPRESSURE.


you live and learn...I never knew about the 4psi difference between hot and cold Thumbs Up

Bushwanderer wrote:
PS: Its best to have your own gauge for this test


Lost it... Rolling Eyes
 The next American ex-pat that calls it a "truck" is going to find out what 2.7 tons feels like on their foot...

Club "yes, I too have had the EGR's replaced..."
Club "yes, I too have had the compressor replaced..."
Club "yes, I too once had the car at the dealer for a couple of weeks nearly 4 weeks over 4 weeks...5 weeks"
Club "yes, I too have had EPB failure..."
Club "yes, I too get mysterious bings and bongs..." 
 
Post #46751715th May 2009 7:40 am
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Bushwanderer
 


Member Since: 27 Nov 2007
Location: Northern Rivers, NSW, Australia
Posts: 2050

Australia 2005 Discovery 3 TDV6 S Manual Buckingham BlueDiscovery 3

JF Lux wrote:
SNIP

Lost it... Rolling Eyes


I'd noticed that. Rolling with laughter Rolling with laughter Rolling with laughter
 The Bearded Dragon  
Post #46799916th May 2009 4:02 am
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