Quote: Originally posted by clever on 08/7/2015
36 psi seems very low to me. Ours are 65 psi, although I tend to do them a bit lower when cold.
Is that the tyre pressure quoted on the tyre, or what is recommended for your caravan? If it is the former then that is the MAXIMUM tyre pressure allowed for that tyre, not necessarily the pressure it should be inflated to.
Quote: Originally posted by freeatlast on 09/7/2015Motobiman you were not able to provide any evidence that caravans were not damaged by road vibrations in a recent similar topic, you simply spat your dummy out.
I have researched online and haven't found a single report of a caravan being damaged by tyres inflated above the manufacturers recommended pressure.
So, back to you, do your research and show me where this old wife's tale becomes fact.
A few percent? The tyre pressure guages at fuel stations are only accurate to a few percent generally so that is a fatuous point.
Manufactures use the same chassis and suspension for many different caravans and they only change the tyres to suit the load and set the pressure accordingly.
They build the caravan taking no account whatsoever of this tyre over inflation shaking caravans to bits nonsense.
No doubt tyre pressure affects the ride but not to the extent you are suggesting and certainly not enough to destroy the caravan as is being suggested.
I would of thought that would be common sense,if you make the ride harder eventually you will shake the thing apart, lets not forget they dont have the same suspension as cars.
whats your opinion on the towing vehicle do you think that they could cause the van to fall apart ??
caravans structures will suffer over time from road shock vibration.. the more the road shock vibration the more they will suffer..
i have my own evidence of bad things happening in my van due to road shock and do my best to keep road shock to a minimum..
i drive slower on bumpy roads.. i drive around pot holes.. i go over sleeping policemen at 5 mph.. and i also do the obvious.. i dont blow my tyres up any harder than i have to..
caravan suspension is pretty crude (and hard) with very little load deflection.. the tyres play a part in all this.. running them harder than you have to isnt a good idea..
how hard is correct.. as hard as they have to be without too much deformation under the load they have to carry.. the speed they travel at also plays a part..
people complain about leaky caravans.. a couple of things help the vans structure fail and eventually leak..
they are fastening over size large awning to the sides of a caravan and the common practice of blowing tyres up harder than they need to be..
the awning literally tries to pull the sides off the caravan and crude suspension combined with over hard tyres literally tries to shake the caravan apart..
nothing i say will change what folks do.. it never has.. he he..
Quote: Originally posted by bessie500 on 10/7/2015I would of thought that would be common sense,if you make the ride harder eventually you will shake the thing apart, lets not forget they dont have the same suspension as cars.
whats your opinion on the towing vehicle do you think that they could cause the van to fall apart ??
Bessie
Post last edited on 10/07/2015 09:59:56
The trouble is with the words Bessie.
'Harder' does not cut it I'm afraid.
How much harder before the effect goes from 'unnecessary' (CC wording) to something like catastrophic or somewhere in between?
As I have said all along, it's the definition of the term 'over inflation' that is important here.
One guy did and his was 'a few psi over' and that is frankly silly as the gauges are not accurate enough to ensure that exactitude.
As to your last question, I dont see why.
Rough terrain, high speed, poor road surface, lots of stopping and starting, I guess they would have an effect and all of them more than blowing tyres up harder, even say 25percsnt harder than the recommended pressure, that is derived from the tyre loading only.
Quote: Originally posted by trog100 on 10/7/2015
caravans structures will suffer over time from road shock vibration.. the more the road shock vibration the more they will suffer..
i have my own evidence of bad things happening in my van due to road shock and do my best to keep road shock to a minimum..
i drive slower on bumpy roads.. i drive around pot holes.. i go over sleeping policemen at 5 mph.. and i also do the obvious.. i dont blow my tyres up any harder than i have to..
caravan suspension is pretty crude (and hard) with very little load deflection.. the tyres play a part in all this.. running them harder than you have to isnt a good idea..
how hard is correct.. as hard as they have to be without too much deformation under the load they have to carry.. the speed they travel at also plays a part..
people complain about leaky caravans.. a couple of things help the vans structure fail and eventually leak..
they are fastening over size large awning to the sides of a caravan and the common practice of blowing tyres up harder than they need to be..
the awning literally tries to pull the sides off the caravan and crude suspension combined with over hard tyres literally tries to shake the caravan apart..
nothing i say will change what folks do.. it never has.. he he..
trog
And of the effects on the caravan you mention, tyre pressure probably has the least effect IMHO.
i would agree that over size awnings probably to more long term damage than over inflated tyres..
but for my kind of caravaning.. last week over a thousand miles covered and on some single track county lane type roads its tyre pressures that take priority.. i never use an awning..
tis a bit like my 4 x 4 truck.. on road 30 psi.. off road 15 psi.. to be honest there is no exactly right tyre pressure for all conditions..
my boat trailer.. with a boat on 85 psi with no boat on 15 psi.. the only point i make is nothing is gained by blowing tyres up harder than they need to be..
pneumatic tyres do help absorb road shock.. tis why we have them as opposed to solid tyres.. he he
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Topic: Tyre pressure
