Not checked 'em for a few weeks:

Fronts: 20 (!) 30
Rears: 30 30

All pumped up now F 33 R 36  .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
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Worth noting that 33/36 is full pressure for a loaded car.

If your driving solo during winter 30/33 is good and comfy unless high speed motorway.

I was waiting for that !!

From the handbook for my model:

Normal operating conditions: Front 33 Rear 36

Vehicle loaded to maximum gross vehicle weight: Front 36 Rear 44

 .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Yes but they assume two peeps and luggage.......

Local solo no luggage and its a bit hard.

is that with just a bit of fuel or a full tank.  ... - .- -.




Y. O. L. O.
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Gazellio @ Prestige Cars wrote:

If your driving solo during winter 30/33 is good and comfy unless high speed motorway.

How "high-speed" are we talking here? I need to check my tyre pressures soon so was looking for recommendations for comfort. 
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For those of us which work in current pressure measurement units, below a conversion table from the old to the new. Personally, I use 2.3 bar for the front and 2.5 bar for the back.

20 psi = 1.37 bar
25 psi = 1.72 bar
30 psi = 2.06 bar
33 psi = 2.27 bar
36 psi = 2.48 bar
40 psi = 2.75 bar
44 psi = 3.03 bar

Here is what the Michelin man (source: http://www.michelin.co.uk/tyres/learn-shar...-pressure) has to say for the tyre pressure:

By keeping your tyres at their correct pressure, you’ll reduce your running costs.
Under inflated tyres are prone to overheating use more fuel and wear out more quickly.
Likewise, over inflation can reduce tyre life, reduce grip and cause steering problems.

WEAR. A tyre which is 20% under- inflated can give 20% less mileage. That means a loss of 5,000 miles (8,000 km) on a potential mileage of 25,000 miles (40,000 km).

FUEL CONSUMPTION AND CO2 EMISSIONS. Low tyre pressure increases both fuel consumption and CO2 emissions.
Follow the advice of the vehicle or tyre manufacturer, particularly with regards to the conditions of use (loads/speeds etc.)

• Check pressures when the tyres are cold (tyres which have not been used in the last 2 hours or have covered less than 2 miles (3 km) at low speed).
• If tyres are hot when they are checked, add 4 to 5 psi (0.3 bar) to the pressure recommended by the vehicle manufacturer. Re-check the pressures when the tyres are cold.
• Never deflate a hot tyre.
• Even if tyres are inflated with nitrogen, the pressures and overall tyre condition must still be checked frequently

With 2 bar or 30 psi at front and 2.27 bar or33 psi back you are underinflating your tyres by 10%.!

My front tyres will go from 2.3 bar to ~1.5 bar in less than a month, recently checked the right tyre and it had dropped to 1 bar, left tyre was 1.3

I guess losing almost 1 bar in just a few weeks isn't normal?

Correct tyre pressure will also depend on the size of the tyre  1990 3.5 v8 defender
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My point was that as a solo driver you can get more comfort and winter grip with slightly lower pressure than the recommended. Car manufacturer's build in a "Safety Margin" to protect themselves against liability.

I like 30/33 with winter tyres for local winter use but that just my choice and is only 10% below Manufacturer's Recommended just in case limits that assume two people and a little luggage.

Please do not take this as advice though (protecting myself )

Last edited by Gazellio @ Prestige Cars on 28th Sep 2012 7:19am. Edited 1 time in total

i agree with gary but dont reduce the pressures any more than what gary has stated and remember to increase if going on a high speed ,long journey .. ... - .- -.




Y. O. L. O.
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I keep mine at 35 front and 38 rear. Makes it a bit more economical and the fronts only end up getting scrubbed anyway from corners so the wear is almost even at that end.

Boot it out of a corner though and the DSC kicks in  FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
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I dont agree with Gary but each to their own as they say.

Please keep in mind that the pressure will drop even further if the temperature goes down.
How many of us go and check their tire pressure on a cold morning before they set off?

If your pressure is 30/33 to sart with and the temperature drops 10 C lower, I guesss (sure there is some tables hidden by google somewhere) you are talking tire pressure of 24/27 on a car that is 2.7 tonnes.

Pitsnow wrote:

If your pressure is 30/33 to sart with and the temperature drops 10 C lower, I guesss (sure there is some tables hidden by google somewhere) you are talking tire pressure of 24/27 on a car that is 2.7 tonnes.

it wont drop 6 psi... ... - .- -.




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