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Matador Tyres cracked


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#1 Steve&Tracy

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Posted 08 June 2008 - 07:06 PM

We are of to France next Friday I have just gone to check the tyre pressures on our 2007 Mendip Magnum 534 (Compass Omega 524) and have found large cracks some up to 3 inches long round the side walls of both tyres they are Matador Maxilla MPS 320 102/100 Dot J3KM 4706 T2 which I think means they were manufactured 4th week July 06 the van is regularly used, the tyres are not left in sunlight and nothing was noted on the 1st service in February.
I am reluctant to risk it on these tyres, so will have new ones fitted and try to sort out the warrenty when I return due to time.
If you have a similar aged van with these tyres I would have check before you use it next.
Swift had a similar problem with a earlier batch which is documented on other forums.
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#2 rob_jax

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Posted 09 June 2008 - 07:08 AM

Hi Steve,

Easy choice - as you say you must get them changed before towing any distance at all - and by any distance, for me that means driving no further than to the tyre place.

4706 means week 47 in 06 - so I'd definitely retain the tyres for a refund

Eriba (Hymer) owners in Holland have continued to report issues with Matador tyres - apparently a good correlation between cracking and motor movers - and so (to my knowledge) Hymer have switched to GT Maxmiler for Holland and the UK ...

And I think you mixed up Matador and Maxmiler in your description...

Robert
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#3 Steve&Tracy

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Posted 09 June 2008 - 07:56 AM

You are right Rob that should read Maxilla I have corrected the post.
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#4 rob_jax

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Posted 09 June 2008 - 11:32 AM

A bit more from the Eriba / Hymer forums:

1. Most of the cracking has appeared around the tread blocks - probably the link with the use of motor movers

2. Perhaps more of a concern is that a few participants reported serious cracking on the inside wall of the tyre (towards the centre of the caravan) - exactly where you wouldn't find it during any normal examination...

3. And a few people reported odd bulges in the side walls - thought to be a manufacturing "feature"...

Robert

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#5 Steve&Tracy

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Posted 09 June 2008 - 08:23 PM

The cracks are on the outside only both tyres seems that they have not been adequately UV stabilised both have been covered from direct sunlight when stored.


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#6 logiclee

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Posted 09 June 2008 - 08:33 PM

There is no way I would tow with either of the tyres in the above two photos.

Just not worth the risk.

Cheers
Lee

#7 gary

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Posted 09 June 2008 - 10:06 PM

A few thoughts, but first due to their age I don't think lack of UV protection is anything to do with it, especially as they've been covered

Important to note this outer coating of rubber on the side walls has no other purpose other than protecting that beneath and perhaps somewhere to print all the bumph. Of course though this protection is vital to ensure no deterioration of those more vital inner layers.

From what I see of the cracking and it's position, it seems to me about right to be at the apex of the curve caused by the weight being applied as the tyre turns, if that makes sense?

So while the vans stood would this point be where it would crack if say the tyres were under inflated? in which case it would be perhaps 10 inches of cracking only. However if tyres are correctly inflated and or the cracking all the way round, this would suggest a lack of strength of the inner carcase. Again there's no strength to this outer coat of rubber, it relies on that beneath.

Moving on to movers! and cracking between the tread pattern, to suggest the movers roller might be at fault seems daft to me.

The roller is pushing into the tread, how then can this cause cracking? it's compressing the rubber and it would need expansion to pull it apart and cause cracking.

Taking the two problems together it points me in the direction of a weak carcase, this is the real strength of the tyre and it seems to me it's not up to the job and expanding under the pressure.

The British tyre manufactures recommend a caravan tyre be capable of carrying 10% more that actual, this is on top of the usual 10% speed bonus and giving 20% in all.

So the tyres in question, what exactly are they in terms of what they can carry and how heavy is the van?. Also what is the recommended pressure in relation to that weight
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#8 Millstone

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Posted 09 June 2008 - 10:42 PM

QUOTE (sdrew56 @ Jun 8 2008, 08:06 PM) <{POST_SNAPBACK}>
We are of to France next Friday I have just gone to check the tyre pressures on our 2007 Mendip Magnum 534 (Compass Omega 524) and have found large cracks some up to 3 inches long round the side walls of both tyres they are Matador Maxilla MPS 320 102/100 Dot J3KM 4706 T2 which I think means they were manufactured 4th week July 06 the van is regularly used, the tyres are not left in sunlight and nothing was noted on the 1st service in February.
I am reluctant to risk it on these tyres, so will have new ones fitted and try to sort out the warrenty when I return due to time.
If you have a similar aged van with these tyres I would have check before you use it next.
Swift had a similar problem with a earlier batch which is documented on other forums.

GET THEM CHANGED NOW !!! I have had similar problems with my Fleetwood, in my case the cording failed and the tires swelled to about 1 1/2 times their normal diameter rubbing a hole in the wheel arch !!!

If you hunt the technical side of the CC web site you will see an item about it, it definitely is a manufacturing fault that is showing itself on MATADOR tyres.
Change them for something like Firestone ( a bit softer compound but ride very well) and then have a go at Compass, quote the CC item and if you hunt a couple of the caravan forums you will find plenty of support and detail.

BTW where are you going in France? We are off to The Alps on Friday too (well the 2.00am Boat from Dover to Dunkirque) Just hope the weather improves, certainly taking a 'mac' and a brolly!!


#9 Steve&Tracy

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Posted 10 June 2008 - 06:42 PM

Hi we are heading towards Chambery 12.50pm crossing by the tunnel. Had 2 Continentals fitted today will sort out the warrenty on return have a safe trip. yes.gif
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#10 Steve&Tracy

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Posted 10 June 2008 - 08:05 PM

QUOTE (gary @ Jun 9 2008, 11:06 PM) <{POST_SNAPBACK}>
A few thoughts, but first due to their age I don't think lack of UV protection is anything to do with it, especially as they've been covered

Important to note this outer coating of rubber on the side walls has no other purpose other than protecting that beneath and perhaps somewhere to print all the bumph. Of course though this protection is vital to ensure no deterioration of those more vital inner layers.

From what I see of the cracking and it's position, it seems to me about right to be at the apex of the curve caused by the weight being applied as the tyre turns, if that makes sense?

So while the vans stood would this point be where it would crack if say the tyres were under inflated? in which case it would be perhaps 10 inches of cracking only. However if tyres are correctly inflated and or the cracking all the way round, this would suggest a lack of strength of the inner carcase. Again there's no strength to this outer coat of rubber, it relies on that beneath.

Moving on to movers! and cracking between the tread pattern, to suggest the movers roller might be at fault seems daft to me.

The roller is pushing into the tread, how then can this cause cracking? it's compressing the rubber and it would need expansion to pull it apart and cause cracking.

Taking the two problems together it points me in the direction of a weak carcase, this is the real strength of the tyre and it seems to me it's not up to the job and expanding under the pressure.

The British tyre manufactures recommend a caravan tyre be capable of carrying 10% more that actual, this is on top of the usual 10% speed bonus and giving 20% in all.

So the tyres in question, what exactly are they in terms of what they can carry and how heavy is the van?. Also what is the recommended pressure in relation to that weight


The tyres are 185R x 14C rated at 800kg's per tyre at 66psi the van MTPLM is 1485kg recommended tyre pressure 57 psi only the outer walls have cracked low pressure/load would surley affect both sides, the sidewalls show slight uneveness either way it is now in the hands of the suppliers/manufacturers I have sent them photos and have the old carcasess as I had some Continental Vanco,s fited today.
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#11 gary

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Posted 10 June 2008 - 09:59 PM

Thanks for getting back Steve, as I said a few thoughts but from what you say they should eat the job!

One thing though that seems peculiar to Matador is there load or pressure ratings,

Maurice earlier today is confused to what pressure is correct for his Matador tyres, referring to the Tyre manufactures pressure charts it says it should have a load index of 96 (710kg) and a max pressure of 42psi.

Your size tyres on the same chart should be 102, (850kg) and 65psi, a pounds neither here nor there but wheres the 50kg a tyre gone?
Maurice's tyres had correct load index but at the higher pressure of 50psi?

Up to now whenever I've referred to this chart everything lines up, but these Matador tyres don't relate at all, certainly these two examples!!

I would then check your new tyres against the chart to make sure you've not been given a Matador specific pressure??
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#12 SHACK

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Posted 12 June 2008 - 11:04 AM

Gary, where can I get a copy of the load chart from, thank you . SHACK

#13 SHACK

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Posted 12 June 2008 - 11:10 AM

Gary, found it on your Tyre Pressure Topic, Thank You. SHACK

#14 gary

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Posted 12 June 2008 - 11:53 AM

It's also underlined in my previous post above your question yes.gif lol.gif
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#15 SHACK

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Posted 12 June 2008 - 02:01 PM

Gary, Thank you for the above, As my Vanmaster is fitted with Matador tyres this has now got me thinking.

Vanmaster Handbook.

MTPL. 2000 kg
Tyre Pressure 39psi.

Tyres 175/65 R 14 86 T
Load Index 530kgs Speed symbol 190 kph.
total loading on four wheels 530x4 2120 kgs, Assume the 90% rating 1908 kgs.

Data on tyres Max Load 530kgs. Max psi 51
Are these tyres suitable.
Regards SHACK.