Tyre pressures on tribute T615 (1 Viewer)

[Alonsos]

just done tyre pressures few days ago on Autotrail tribute t615
On seeing what they were I got 54 psi on all 4 corners
So rang Fiat and 3 other places answer was do a few lbs less than manual says
Manual he say
Front 5.0 bar ie 72psi
Rear 5.5 bar ie. 79psi
Tyres are 215/70r 15cp campers
Having conversation in pub & a guy said that's a load of rubbish 72psi and 79 psi much to high for 3.5 ton vehicle
I tend to think it is a bit high , but argue about figures in Manual ?
What do you think ?

 

[Boringfrog]

As has been said before, get van weighed fully loaded including front and rear axles, then e-mail the tyre manufacturer, they will tell you the exact pressures.

 

[pappajohn]

I ran my Kontiki 640L (3.85ton) at 62 rear and 54 front.
handling was fine and tyres stayed cool.

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[Alonsos]

Ah ok didn't know about weighing / manufactuer thing thanks very kind

 

[peterc10]

I agree with BoringFrog. Assuming that they are Continental Campers, they will tell you exactly what the pressure should be for the axle weights you give them. They have tables for all sizes and types of tyres they make. They will be much lower that the very conservative figures used by Fiat and the converters. And when you reduce the pressures you will find that your fillings will stop falling out!

Keep a copy of their table in the van in case you are ever questioned by the police about tyre pressures.

 

[Alonsos]

Mine are Michelin campers

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[peterc10]

Mine are Michelin campers

Ahhh .... in that case I would guess you should not bother. I understand that Michelin are hopeless and just give you the maximum pressure for the maximum load that the Tyre is designed to take, which will probably be much higher than you need.

 

[Alonsos]

Thanks for that

 

[cronkle]

You might find this is useful:
http://www.tyresafe.org/wp-content/uploads/2015/12/motorhome-leaflet.pdf

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