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can anyone out there tell me what tyre pressure i should have in my tyre's the size of tyre is 165/13

                       thanks joanne

165x13 what? after these numbers you will find the load index number and a speed index letter.

You can ignore the letter as it will alway represent a speed faster than you will be towing! however the load index number defines what type of tyre you have and how much load it can carry.

Armed with that information and the weight of your van, you should find the correct tyre pressure as well as much more here or for older tyre types perhaps here

PS, another important number written on the side of the tyre is it's age, you will find out where it is on the first 'here' website above, age should never be older than 7 years and preferably 5 years

Hi Gary

Found your link invaluable. Have had some concerns about my caravan tyres. The van is just over a year old and has the original fit tyres. When moving it on the drive there is a rubbing sound as the tyres rub against the alloy rims.

The tyres are 185/70 R13, with a max load of 530kg, and a max pressure of 36psi as stated on the tyre.

The load index matches exactly the 530kg per tyre. On 1060Kg per axle, my caravan fully laden weight is 1000Kg, and allowing for 75kg nose weight, this puts the axle loading as 95kg, just in the safe area.

The handbook states that pressure should be 45psi, 9psi higher than the max stated on the tyre and the guide. This is what I have been running the tyres at, and as I say, they still look soft.

Are my above sums correct, and should I be challenging the dealer over this.

Quote: Originally posted by freeatlast on 29/7/2009

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Hi Gary

Found your link invaluable. Have had some concerns about my caravan tyres. The van is just over a year old and has the original fit tyres. When moving it on the drive there is a rubbing sound as the tyres rub against the alloy rims.

The tyres are 185/70 R13, with a max load of 530kg, and a max pressure of 36psi as stated on the tyre.

The load index matches exactly the 530kg per tyre. On 1060Kg per axle, my caravan fully laden weight is 1000Kg, and allowing for 75kg nose weight, this puts the axle loading as 925kg, just in the safe area.

The handbook states that pressure should be 45psi, 9psi higher than the max stated on the tyre and the guide. This is what I have been running the tyres at, and as I say, they still look soft.

Are my above sums correct, and should I be challenging the dealer over this.

 

Post last edited on 29/07/2009 19:55:34

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Hi freeatlast , do you know how many plys the tyres are , should be written on the side of the tyres .

atb

Wizard

Hi Wizard

They are 4 ply, 1 polyester, 2 steel, 1 nylon

Does this make any difference?

hi wizard this gives a load index of 86 on the tyre from the inf provided from the thread earlier.

thus meaning they are enoughh but as gart has given sound advice if the tyre is rubbing on the alloy rim call me dense but i dont under stand how it would be rubbing on the rim???? but i would definetly be changing to 175 13 cas then you would be well over rated and not pushing the limit of your weight.

Quote: Originally posted by freeatlast on 29/7/2009

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Hi Wizard

They are 4 ply, 1 polyester, 2 steel, 1 nylon

Does this make any difference?

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I am certainly going to have to change them (2 and the spare), but do I have any comeback on the dealer, as they are original fit?

Obviously the van handbook is wrong, and this needs addressing by the manufacturer..

Rubbing on the rim: as the tyre moves slowly on the (level) drive the tyre sidewall flexes out against the bead of the alloy rim and you can hear it too, though there are no marks evident on the sidewall.