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Subject Topic: Tyre pressure Post Reply Post New Topic
Personlizgr04
12/9/2016 at 9:15am
 Location: wales
 Outfit: Elddis Mistral + Ace Jubilee caravans View lizgr04's Profile View Profile   Reply to lizgr04 Reply   Quote lizgr04 Quote  
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Help needed urgently PLEASE!
I have an Elddis Mistral GTX 1999 2 berth caravan with radial tyres . ( max running load 1100kg)

165R13 94/92Q fitted as far as I can make out . I haven't the handbook and searching online have seen pressures given from 32 to 50 psi which is quite a range and not helping me choose safe pressure! Advice please. MAny thanks Liz


Personchinster1957
12/9/2016 at 9:46am
 Location: Essex
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There is a tyre pressure calculator at
http://www.tyresafe.org/check-your-pressures/caravan-pressure-calculator/

It calculates correctly for my van.

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Personblueexpo97
12/9/2016 at 9:46am
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You could try here.

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PersonGrampian91
12/9/2016 at 11:13am
 Location: Midlands
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Miles out for my van, it says 62PSI, when the handbooks value is 42PSI.

I tried lowering the caravans gross laden weight and had to get it down to 850kg to be at the correct 42PSI.

Something wrong when my 94 rated tyres (670kg) each needs to be at max pressure even for a van at less than 1150kg max weight.


Personnavver
12/9/2016 at 10:08pm
 Location: West country
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What is the max pressure on the side of the tyre


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Persontrog100
13/9/2016 at 3:50am
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unless the tyre is at max load it certainly dosnt want to be at max pressure..

i run my two berth at 42 psi.. the max load is about the same as the OPs van..

i keep mine at the low end of the scale to minimize road shock.. the max pressure on mine is 65 psi but that is for a much heavier load and speeds of up to 90 mph..

trog


Personnavver
13/9/2016 at 9:02pm
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If you know the max pressure and the rated max load and the actual load you can work it out. All that's missing is the max pressure from the tyre wall.


Persontrog100
13/9/2016 at 9:48pm
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is it linear.. lets say the max load is 1500 kg (750 kg per tyre) the max pressure is 65 psi.. the max speed 90 mph..

i know you can add 10% to the max load if the tyre never goes above 60 mph..

so if the 1500 kg is halved to 750 kg can the pressure be halved to 32.5 psi.. which would be something like 28 psi allowing for the 60 mph speed reduction..

you are probably right.. once you know the max load and max psi to suit the max load the rest can be worked out easy enough.. the 10% would be a nice margin of error..

all i know is my van tyres have an easy life.. everything is not much more than 65% of their actual rating.. he he..

trog



Personnavver
13/9/2016 at 10:30pm
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I think it's pretty accurate. Yes there are a few other factors but they won't change it more that a few PSI.

Many cars have quite a big variation for load etc but I'm not sure many people pump their tyres up to run the kids to school then let then down again.


Personeatcustard
14/9/2016 at 1:01pm
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Not even close for me

Mine manual says 45psi, website says 63pis
Also the cars one is quite a way out


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Personnaturlist123
14/9/2016 at 9:10pm
 Location: Southport
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My Adria came with a decal on each mudguard de-picting one of those hand pumps were you put your feet on the stirrups and pump with both hands and a pressure of 4,45 bar = 65 PSI MTMP 1700KGS for van



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