19" Maxxis AT Tyres

As Tombie has said, speed and pressure are the big issues. This can't be emphasised enough. The 19"s will work ok but there is much less margin for error.

I think the placard pressures are on the money, maybe with 1 or 2 psi extra but no more. You need to add a bit more to the front with a bar and winch.

Off road I used to work on a 4psi rule. Whatever my road pressures had been for the weight I was carrying I would drop it by 4 psi. If it got particulary rough I may up that to 6-8 psi but no more - that doesn't include sand of course. That would give the carcass a little more compliance on and around rocks without letting the sidewall bag.

I did a lot of miles in the High Country using that rule and never had a problem up there. Just take it easy and you will be pleasantly suprised how far the Disco will take you.

Cheers,
Jon

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Originally Posted by Babs

So the front stays at 33psi but that's obviously not taking winch & bar into consideration.

Rear fully loaded passengers and luggage 42.

I am going to change my pressures to 36psi front & 38-40psi rear.

33psi front seems a little low and 36 rear the same ❓

I have always run my previous tyres 40psi highway pressure and due to the conflicting information on these 19" rims thought raising the pressure was a safe bet. Obviously not. :O

Cheers, Babs :D Sent from my iPhone using Forum Runner

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I run 34F / 38R on my Hankooks as I have found that to be a good set of pressure for on road use.

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Originally Posted by Grentarc

I run 34F / 38R on my Hankooks as I have found that to be a good set of pressure for on road use.

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Hankooks here too.
35F 38R works well for me.

This afternoon I dropped the front to 36psi and the rear to 38psi.
Driving home M2 I didn't pay attention and didn't notice any difference until I got to my area (rural roads) where the roads are a little rougher and then noticed a substantial difference, the ride was so much smoother, it felt like I was still on the M2. :)

Cheers, Babs :D Sent from my iPhone using Forum Runner

Quote:

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Originally Posted by Babs

This afternoon I dropped the front to 36psi and the rear to 38psi.
Driving home M2 I didn't pay attention and didn't notice any difference until I got to my area (rural roads) where the roads are a little rougher and then noticed a substantial difference, the ride was so much smoother, it felt like I was still on the M2. :)

Cheers, Babs :D Sent from my iPhone using Forum Runner

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On anther topic,

i have often wondered if dropping tyre pressures also reduces wear and tear on the vehicles suspension?

Probably hard to quantify.

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Originally Posted by scarry

Lightly loaded,i presume?

More to the point,would you have run similar pressures if loaded?

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My vehicle is never lightly loaded [emoji6]

Fully loaded doing the Transcontinental I had pressures at the same numbers.

High pressures kill tyres on gibber. On the mine sites I was the person with the least punctures over the time I was there as I was the only one to air down...

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Originally Posted by Babs

Tombie what's with the 4psi difference between front & back [emoji780]

Cheers, Babs :D Sent from my iPhone using Forum Runner

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I find it has benefit is when climbing..

I always air the nose down more, helps the front end pull a bit more.

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Originally Posted by scarry

On anther topic,



i have often wondered if dropping tyre pressures also reduces wear and tear on the vehicles suspension?



Probably hard to quantify.

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You're absolutely correct.... and it's easily quantified.

Quote:

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Originally Posted by Tombie

I find it has benefit is when climbing..
I always air the nose down more, helps the front end pull a bit more.

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I agree Tombie and assumed it was to achieve the same contact patch between front and rear axles.
The front axle is less loaded than rear axle, especially when at travelling weight. This is perhaps less of a factor if you have a bullbar and winch.

Cheers,
Scott

A very experienced racing driver gave me sage advice years ago about my mx5 tyre placard. "The pressures on the placard are the minimum pressures and they are set as low as they can safely be to get the most compliant ride for the occupants" his advice was to go 5-6psi higher on those little low profile mx5 tyres (this was before hitting the track though)