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Sam131fr
Member Since: 22 Aug 2005
Location: Chaintreaux 77
Posts: 51
  
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Hello
it's my my second day driving with my STTs in Mud.
On road, i use the recommended pressure (2.3 front, 2.9 rear), but while offrading, until now, i'm using 2 Bars on the 4 wheels.
sometinmes, it appears that the tyre stays full, and isn't freeing itself from mud, leading to the loss of trajectory, as well as loss of traction.
Does someone have any recommendations for the pressure with STT in Mud ?
Sam 2005 Discovery 3 TDV6 HSE Auto - 7 seat - Bonati Grey - Alpaca leather
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 4th Feb 2008 12:49 pm |
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Sam131fr
Member Since: 22 Aug 2005
Location: Chaintreaux 77
Posts: 51
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Hummm....
No-one wears Cooper STT and practice offroading with Mud ?
Sam 2005 Discovery 3 TDV6 HSE Auto - 7 seat - Bonati Grey - Alpaca leather
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| 7th Feb 2008 10:45 am |
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Slimer
Site Moderator
Member Since: 06 Jan 2005
Location: Last Exit to Nowhere
Posts: 16295
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When I had STTs I just left them at normal road pressures all the time, seemed fine  The End
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| 7th Feb 2008 10:51 am |
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Bodsy
Site Sponsor
Member Since: 06 Nov 2006
Location: In the Clubhouse
Posts: 21361
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WSe left Rob's STT's at normal pressure in snow & mud. Only seemed to get stuck at the same places as everyone else...... Bodsys Brake Bible
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| 7th Feb 2008 11:53 am |
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heine
Member Since: 07 Feb 2007
Location: Midrand
Posts: 4054
 
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You can quite happily go down to about 1.4 if you like as the sidewalls are quite thick and don't deform as quick as std tyres
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| 7th Feb 2008 12:13 pm |
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gilmore
Member Since: 16 Jan 2005
Location: On the sofa
Posts: 2185
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I keep my STTs at normal road pressures whatever the terrain. They seem to work OK.
regs
rob All opinions expressed in this posting are my own and are not necessarily those of someone who knows what they are talking about.
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| 7th Feb 2008 12:49 pm |
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simon_arch1
Member Since: 10 Apr 2006
Location: Melbourne Australia
Posts: 502
 
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Off road, IMHO, you should always drop tyre pressures - with my MTR's on the D2 (similar to the STT) - I always ran them in mud, ruts, rock at around 18-22 PSI. Not sure what this translates in Bar. I use a similar rulre with the Mickey Thomspon ATZ on my D3.
In sand, you sometimes have to go even lower - as low as 12-16psi. So long as you reinflate before high speed tarmac driving - this is the way to best enjoy your drive, and get through most terrain, as well as minimise the chance of staking a tyre with sticks or rocks.
cheers,
Simon D3 - Buckingham Blue, SE, TDV6, 06 model; chipped; underbody armour; Mickey Thompson ATZ 275/65-18 AND MAXXIS Bighorn muddies; rear wheel carrier from 4x4intelligence.com; iPOD aux connection! GME 3200 UHF - aerial mounted on wheel carrier  ; LR roof rails/cross bars; Autosafe cargo barrier, Safari Snorkel; Traxide - aux battery; ARB bull bar with Tigerz11 winch; Lightforce 240 XGT driving lights (mitchell bros tow hitch to come)
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| 8th Feb 2008 12:28 am |
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Sam131fr
Member Since: 22 Aug 2005
Location: Chaintreaux 77
Posts: 51
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Thank you simon !
i think i'll test with a square 16-18 PSI.
For the others, you should try to lower the tyre pressure when you have difficulties in Mud, you'll see the differene.
When i started with my STTs (those are my first Mud tyres) i was under a road pressure (2.5 Front, 2.9 Rear) and on a sleepery hill, i couldn't go up...the tyres were full, and hey weren't autocleaning enough. I dropped the pressure to a square 2.0...and it ran through the hill with no difficulty...
Cheers
Sam 2005 Discovery 3 TDV6 HSE Auto - 7 seat - Bonati Grey - Alpaca leather
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| 11th Feb 2008 9:42 am |
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heine
Member Since: 07 Feb 2007
Location: Midrand
Posts: 4054
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IMHO you should always drop your tyre pressure - even if the car is getting through at the normal pressures - you'll save wear on the car (shrub hugger mode on) and it is friendlier to the environment as well (shrub hugger mode off) 
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| 11th Feb 2008 11:34 am |
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