Deflating in the First World

[Mad Manny]

Watching a few Ozzie Youtube Channels as well as a few North American shows, I noticed something:

Being backward, these guys still use the old Imperial system & refer to PSi tyre pressures.
That's Pounds per square Inch (we stopped using Pounds & Inches in the early 1960's #progressive).

We use Bar or KPa (basically the same thing)

The other thing I noticed is that they barely deflate.

Guys refer to dropping (dropping! ) to 30PSi, sometimes to 20PSi (here in SA we consider 20 ps i to be a LOT) & then occasionally, to 15PSi.

Now 35, 20 & 15 PSi are not that soft:

35 psi = 2.41 bar or 241 KPa
30 psi = 2.07 bar or 207 KPa
25 psi = 1.72 bar or 172 KPa
20 psi = 1.38 bar or 138 KPa
15 psi = 1.03 bar or 103 KPa

So these guys are 'airing down' or 'Deflating' to around 1.8bar & sometimes to around 1.4 bar.
They NEVER go below 1.0 bar.

If I deflate, then I either go to 1,2, or 1.0, if its thick sand, I'll drop lower, I've been to 0.6 bar.

I can't 'Deflate' to 30psi because that's basically my normal running pressure...

Anyone agree with these Canucks, Yanks & Ozzies?

[KurtG]

Grips will tell us you should deflate to -15PSI when he comes here shortly

[Mad Manny]

Grips will also mention how your Ford will shake to pieces at 30 psi = 2.07 bar or 207 KPa on the Northern Cape roads....

[Johannes]

1.2 bar . Dont know how they do it ?? Must be lockers they have an why they permanently use winches ??

[Mad Manny]

Johannes, 4WD 24/7 are/were sponsored by 'Dominator Winches' so they pull out the winch faster than a porn star pulls out near the end of a shoot...

Also, Shauno is not that good at Wheelin...

[HenriSteyn]

During my first dune trip in Swakopmund my guide ( a fellow 4x4 CF member named Bartho) showed me some ropes.

My first 5 attempts to get up a dune with tyres at 1 bar failed. He suggested 0.8 bar and up I went no problem.

So low pressures are beneficial.

And I could not believe 0.2 bar made such huge difference.

No idea how the imperial guys get away with higher pressures. Maybe that is why they get stuck so often.

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[grips]

Dom Fokkers. ( Down Under)

Doing the NC roads I never go above 1.6.
Even on tar.
Only going above 1.6 when fully loaded..
Sand 0.5 and lower.

But then I look at profile rather than pressure.

Thing to remember you drive on air. Steel wheels were an Ox wagon feature

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[grips]

There is only one thing that is useful when inflated hard & that is definitely not a tyre

[Mad Manny]

Grips, how long do your tyres last?

[KurtG]

https://youtu.be/yewkCBYg4K0 check these idiots from down under

[grips]

BF's pappie. The one set on the 79 were 80k plus when I had the last look.
Think they will do 90k..
Did a trip from Lüderitz to Walvis on a set of BF's at 0.6. Replaced them at 90k km...

[KurtG]

BF's pappie. The one set on the 79 were 80k plus when I had the last look.
Think they will do 90k..
Did a trip from Lüderitz to Walvis on a set of BF's at 0.6. Replaced them at 90k km



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Oh dear, someone here says BFG are good tyres . Wait for the Cape Softroader to come and tell you that BFG are crap on X-Trails.

[Mad Manny]

Luckily X-Trail Junky skulked back to Anythingbutt4x4.cum otherwise he's be giving his 'one trick pony' views on BFG's here....

[grips]

Well he still has to post pics of him 4x4'ing outside of the WC.

[Mad Manny]

You mean outside of Atlantis Dunes?