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Rod

 

Maybe none! It will depend on the manufacturers spec. Because caravans are getting heavier you need beefed up tyres, assuming that its a single axle. Often 6 ply van tyres are OK for caravan as they are designed to take more weight. Have you any information in the handbook?

 

David

David - Milton Keynes

Bailey Alliance 66-2 Motorhome for holidays and a Kia Venga for home.

 

Caravan Travels

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Ooops!

 

There is a big difference. Caravan tyres need to be reinforced (I think I'm right in saying it's law).

 

I took a wheel to Kwik fit to have a tyre put on it. I let slip that it was for the caravan and they insisted I had to have a reinforced tyre at three times the price.

 

I know what you're thinking. ..they wanted to sell me a more expensive tyre. That is not the case as the fitter was my nephew.

 

I'll try and find out the EXACT legal position.

 

Mind you is it worth paying the extra to ensure the safety of your family. ...............of course it is!!!

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OK. .................I have a definate answer, having just phoned my nephew.

 

There is no law stating what tyres should be on a caravan but the industry recommendation is this. ............

 

The 'total ply' for all wheels on a caravan should be a minimum of 12 ply. Therefore if you have a twin axle caravan (with four wheels) 4 ply tyres are OK as the total ply is 16 (4 X 4 = 16).

 

However, if it is only a single axle caravan, 4 ply tyres would not be recommended as 2 X 4 ply = 8 ply.

 

The minimum ply recommended for a single axle caravan is 6 i. e. 2 X 6 ply = 12 ply.

 

Hope this is clear.

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OK. .................I have a definate answer, having just phoned my nephew.

 

There is no law stating what tyres should be on a caravan but the industry recommendation is this. ............

 

The 'total ply' for all wheels on a caravan should be a minimum of 12 ply. Therefore if you have a twin axle caravan (with four wheels) 4 ply tyres are OK as the total ply is 16 (4 X 4 = 16).

 

However, if it is only a single axle caravan, 4 ply tyres would not be recommended as 2 X 4 ply = 8 ply.

 

The minimum ply recommended for a single axle caravan is 6 i. e. 2 X 6 ply = 12 ply.

 

Hope this is clear.

798[/snapback]

 

That is the best explanation I have heard. ..simple to understand and would have made perfect sense a few years ago. ..I just worry now about the latest twin axles as they approach two tonne and some of the heavier single axles. ..perhaps it should be revised to 16???..but as a minimum it is still spot on and at least a great 'rule of thumb'

Never thought I would say this :angry: . ..well done KwiK-Fit

gary1s.gif

 

Arc Systems are specialist Carver caravan product repairers, committed to providing a comprehensive service as well as spare parts for these popular heaters.

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Another comment he made was that caravan tyres don't have the wear on the 'walls' of the tyres that cars have. They don't have the 'leaning over of tyres' that a car has when it's turning. .............the wheels just follow the line of the car so the majority of the wear is on the bottom, not the sides.

 

I suppose they will revise their advice eventually but for now that is their recommendation.

 

My Nephew is actually the Kwik fit Branch Manager not just some trainee fitter. ............so I trust his advice.

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There is no law about car tyres, reinforced, 6-ply or 8-ply tyres on caravans.

 

The load rating of the tyre MUST be adequate for the weight of the caravan.

 

Earlier, lightweight, caravans at 800 kg MTPLM could, and did, run on car tyres, 155/80R13. Quite legal and quite safe.

 

Car tyres, reinforced, 6-ply and 8-ply all have different ratings for the same size.

 

You should aim for a total tyre load capability at least 10% MORE than the caravan's MTPLM.

 

Any decent tyre dealer can supply suitable tyres PROVIDED you tell them the MTPLM and number of axles.

 

Anyone who trusts ANY information given by "Kwi. .it" is very misguided. They have one of the worst reputations in the car industry, which isn't reknowned itself for good reputations!

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For a caravan loaded to 85% of the car kerb weight, then, for a single axle caravan, the load on each tyre will be 70% higher than the load on each car tyre. For this reason caravan tyres require a higher load capacity than car tyres. Caravan tyres a prone to cracking in the sidewalls due to standing for long periods in one position. They should be carefully inspected at the start of each season. The sidewalls will usually go before the tread wears out and the tyres should be replaced periodically. The tyre makers trade body, the British Rubber Manufacturers Association say that ideally, they should be replaced after 5 years and never used when more than 7 years old.

 

Brian

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Well, my continental view of things. ...: it's all about load index, no ratings of HR/VR or whatever applies, because of no speed limits will be violated (exeption: http://www. ncc. nl/trekauto/actueel/snelheid. htm) ;-)

Better load index figures are garanteed with so called C tyres (Commercial). They are somewhat stiffer (8 ply is common) but that is no problem. You should however 'load' these tyres with the recommended pressure. A good fitter will advise you between 3,5 and 4,5 bar - roughly, depends on type and make - depends on the actual load. Full load means 4,5 bar and less means. ..

 

Regards, Bert

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  • 8 years later...

Spoke to ministry the hand book of caravan tyre specks supersede all other recommendations i have a 40 year old cavalier states in my hand book 4 ply who can argue with that? 40 years proof is ok

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Spoke to ministry the hand book of caravan tyre specks supersede all other recommendations i have a 40 year old cavalier states in my hand book 4 ply who can argue with that? 40 years proof is ok

Hmmm. ....

 

Once upon a time they used to tie a woman to a ducking stool and hold her underwater. ..If she survived she was deemed a witch and burned at the stake, if she drowned she was presumed innocent. The practice went on for many years and was assumed to be 'foolproof'.....

 

Would you still say 40 years proof is enough???

 

:P

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Looking at the 2005 dates of previous posts and at 8yrs on, were certainly getting there! :)

gary1s.gif

 

Arc Systems are specialist Carver caravan product repairers, committed to providing a comprehensive service as well as spare parts for these popular heaters.

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