COOPER Armortek3 STT

Submitted: Friday, Aug 25, 2006 at 22:14
ThreadID: 37118 Views:3098 Replies:9 FollowUps:17
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I have perservered with Cooper ST's for 6 years and before that had BFG A/T's. My opinion is that I honestly couldn't tell any difference between the two brands and as far as I was concerned they were interchangeable. For instance went on desert crossings with both (different occasions of coarse) and they both performed ok, but couldn't say they were brilliant as some people have. No punctures but both returned with chipping. After a while the Cooper's started to show signs of block splitting and that happened on two sets.

I recently decided to go for the Armotek3 STT's and after 2 months trying them on road, gravel, dirt and sand, I can tell you that I am absolutely rapt. There is a marked difference in their road handling capability on all surfaces that I can actually detect! On gravel/dirt, they actually grip and you feel like you are on rails. On bitumen I thought they would be noisy and loose around corners, but actually they are as quite as the ST's (from inside the cabin) and again they stick to the road - even in the wet.

One note of concern though - I was advised by my mechanic that they are a soft compound, so I won't get much wear out of them. I have them on all the time and drive on bitumen through the week and go off road on most weekends. Has any one got any experience on wear expectency? I have a set of BFG's that I could swap over, but I couldn't be bothered to have them changed every time I want to go on a trip.

ps - they mess up the Patrol big time when off road or in the wet. They throw up mud and a dirty mist that completely covers the back and sides. Still I can put up with that for the extra control and capability.
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Reply By: Sand Man (SA) - Friday, Aug 25, 2006 at 22:21

Friday, Aug 25, 2006 at 22:21
Gee mate, your easy to please.

One strike for me and they are off my shopping list, whatever the brand.

I guess it really gets down to personal preference and the cost vs wear vs performance. Everyone will have a different criteria.
Bill


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AnswerID: 191058

Reply By: Derek from Affordable Batteries & Radiators - Friday, Aug 25, 2006 at 22:30

Friday, Aug 25, 2006 at 22:30
A very good friend of mine and an ExplorOz menber had Coopers on his Disco.

He had a blow out going to Birdsville after just 10 000 km town driving. He is a very capable driver and is currently on a round trip of Oz on BFG's.

Basically after his Birdsville blowout and a failed warranty claim in Brisbane he sold the other 3 tires and went to BFG's after 15K.

Coopers basically chased him out for the store !

He was quite upset when he came to see me after his trip to the races. What a way to enjoy a few weeks off and end it in an argument over a 80 000 km promise.

I have some photo's, I will look for them.

Regards Derek.

AnswerID: 191060

Follow Up By: pprass - Friday, Aug 25, 2006 at 22:36

Friday, Aug 25, 2006 at 22:36
Hope they weren't the Armotek3 STT's!
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FollowupID: 448755

Follow Up By: Member - Andrew W (SA) - Saturday, Aug 26, 2006 at 10:46

Saturday, Aug 26, 2006 at 10:46
They weren't STTs - STTs do not have the 80000km warranty.

It is very rare for Cooper to turn down a warranty - do you mean the dealer turned it down, or Cooper themselves?

Was it clearly mashed by a cattle grid or something?
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FollowupID: 448820

Reply By: pprass - Friday, Aug 25, 2006 at 22:32

Friday, Aug 25, 2006 at 22:32
Not sure what you mean by "easy to please".

btw - STT's are totally different tyres to the ST's.
AnswerID: 191061

Follow Up By: Sand Man (SA) - Friday, Aug 25, 2006 at 22:58

Friday, Aug 25, 2006 at 22:58
pprass,

From you own description:-

Strike 1. Chipping
Strike 2. Block Splitting
Strike 3. Block Splitting (2nd set)
Strike 4? Soft Compound - Possibly less wear

I'd say your very easy to please, sticking with the same brand.

Bill


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FollowupID: 448762

Reply By: Derek from Affordable Batteries & Radiators - Friday, Aug 25, 2006 at 22:37

Friday, Aug 25, 2006 at 22:37
Found the photo that almost brought a grown man to tears when he was chased out the shop by some low life.


AnswerID: 191063

Follow Up By: Derek from Affordable Batteries & Radiators - Friday, Aug 25, 2006 at 22:45

Friday, Aug 25, 2006 at 22:45
I meant to mention that this was a smooth gravel road. The Disco was not overloaded and I did the service and tire pressures just before he left.

I know it has been over a year now but I think they owe him a full set of tires and a big sorry card. (Possibly fire the ****head in charge)

He retired last month and is heading south toward NSW. The Disco was traded and is now replaced with a 2nd hand '98 100 Series on BFG's 285/75/16.

I don't sell tires so this is just for your information.

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FollowupID: 448756

Follow Up By: Richard & Leonie - Friday, Aug 25, 2006 at 22:57

Friday, Aug 25, 2006 at 22:57
But what caused the blow out? It looks like the car is on a dirt road and the tyre could have been damaged by a rock or whatever. The photo does not prove a dud tyre. I have happily used Coopers for years and recently had my first side wall damage on an ST coming out of Ruby Gorge in the East Macs. The tyre had 5000ks on it. I am sure the damage happened on a stretch of dirt where I was travelling at 90 ks and hit an unmarked dip on a curve. The tyre did not blow out but I would not be surprised at the speed and depth of the dip the tyre was subjected to tremendous forces and the side wall must have been almost parallel to the road. An ideal situation for side wall damage from a rock and a blow out. I tend to believe the test done by 4X4 Australia mag on a number of brands and Coopers came out on top in regards to being tough and resistant to damage. Still however you cannot help bad luck.
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FollowupID: 448758

Follow Up By: Derek from Affordable Batteries & Radiators - Friday, Aug 25, 2006 at 23:02

Friday, Aug 25, 2006 at 23:02
Sure, if you damage the tyre and it is your fault your just replace it.

In this case it was not his fault and after the poor service he received he opted to buy a full set of BFG's and chuck the Coopers. You have to be pretty upset to do that.

It was not his fault. More a faulty tyre.

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FollowupID: 448764

Follow Up By: Billowaggi - Friday, Aug 25, 2006 at 23:46

Friday, Aug 25, 2006 at 23:46
That is a typical 'run flat' and will happen to any make of tyre after a sudden loss of pressure or constant running at very low pressure at high speed. It will happen to any make of tyre!

Regards Ken.
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FollowupID: 448771

Follow Up By: Derek from Affordable Batteries & Radiators - Saturday, Aug 26, 2006 at 07:10

Saturday, Aug 26, 2006 at 07:10
John said it went Bang !
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Follow Up By: Member - Andrew W (SA) - Saturday, Aug 26, 2006 at 10:54

Saturday, Aug 26, 2006 at 10:54
By the way, these were Cooper STs by the looks.

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Follow Up By: Member - Stan (VIC) - Saturday, Aug 26, 2006 at 13:56

Saturday, Aug 26, 2006 at 13:56
The Cooper STT will blowout the same way as the ST pictured above...
Just search a forum, I posted similar Cooper STT a few times, which did
blow out as well and Coopers rep said "bad luck"....

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FollowupID: 448846

Follow Up By: Member - Andrew W (SA) - Saturday, Aug 26, 2006 at 16:12

Saturday, Aug 26, 2006 at 16:12
... will blowout the same way ...

that is a pretty pointless sort of comment. What caused this tyre damage could well have caused tyre damage to any sort of tyre.

I've seen all sorts of blown out tyres including Coopers.

There is no telling what caused that tyre failure from that picture as outside wall has been driven into oblivion.

If there was a fundamental weakness in Cooper STTs causing blow outs then there would be a recall, especially given the work they do.

I drive on Coopers by choice, and I have a business to run on them - not an occasional bit of fun.

Ciao for now
Andrew.
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FollowupID: 448856

Follow Up By: Member - Stan (VIC) - Saturday, Aug 26, 2006 at 20:17

Saturday, Aug 26, 2006 at 20:17
Other tyres like MTRs don't blow out, they will got flat but sidewall will not
disintegrate to the same as ST/STTs on the pictures. MTR sidewall might get
"bulged" but it will not detach from the tread...

If you are happy with their performance that's fine. But in my opinion they are not suited for the type of punishment on the outback roads that we give them.
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FollowupID: 448882

Reply By: Willem - Saturday, Aug 26, 2006 at 04:54

Saturday, Aug 26, 2006 at 04:54
Armortek3 STT......HA!!!!!

As I have said before on this forum (and possibly concur with your thoughts to a certain extent on this one)......, the STT's are very good as far a traction and ride goes BUT their 33% better sidewall protection is just that. 33% of WHAT? The Armortek3 and the sidewalls are paper thin.

I am on my second set of Coopers. The first STT's(old style) started cracking around the beads at 30,000km and were about half worn. Coopers let me have the new Armortek3 STT's at cost.

Now at 16,000km the tread has cracks and chips in it but above all the tyres have some serious sidewall damage. I have now had 7 'gaters' fitted to the inside of the tyres but two of the tyres actually need sidewall repairs. The 'gaters' tend to come loose after a while. I have been quoted $60 per tyre for sidewall repairs. Two of the punctures are in the Armortek3 region.

Coopers STT's are good for
1. Bitumen
2. Good gravel roads.
3. Wet Mud
4. Slow travelling in rocky country.

Coopers are close to useless for
1. Off track driving
2. Damp black soil or sticky mud
3. Shale covered tracks

As soon as it is feasible I will be going back to split rims, tubes and 14ply tyres. These tyres should be less prone to punctures but they will be more cumbersome to repair out in the bush. Everything is a compromise.
AnswerID: 191084

Follow Up By: Willem - Saturday, Aug 26, 2006 at 05:23

Saturday, Aug 26, 2006 at 05:23
Forgot to add that the Cooper STT's are pretty good in sand at low psi
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Reply By: pprass - Saturday, Aug 26, 2006 at 08:55

Saturday, Aug 26, 2006 at 08:55
Thanks Willem - however I am still non the wiser regarding my initial query regarding how they wear?

You mentioned that "the Armortek3 .... sidewalls are paper thin." So does that mean that the BFG Mud-Terrain A/T's are also paper thin as they have the same no. of ply?
AnswerID: 191100

Follow Up By: Member - Andrew W (SA) - Saturday, Aug 26, 2006 at 10:53

Saturday, Aug 26, 2006 at 10:53
The sidewalls are reinforced, and I have had no sidewall damage in 10,000k's on STTs - about half of it on the Nullabor.

I have been told that for radials, the number of ply thing is an equivalency rating these days - equivalent to 8 ply or whatever rather than the actual construction details.

As much as I have a similar setup to Willem, I suspect I don't drive as hard as him though.

Ciao for now
Andrew.
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FollowupID: 448822

Follow Up By: Willem - Saturday, Aug 26, 2006 at 18:59

Saturday, Aug 26, 2006 at 18:59
pprass

I would expect around 60,000km minimum from the current set. Yep BFG would be paper thin as well. This is just my experience from sticking multiple plugs in them after they have been staked

Andrew

No, I don't drive hard at all but I do go into places where some fear to tread. I suppose I should not expect rag type tyre longevity from paper thin Cooper sidewalls.

Cheers
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FollowupID: 448874

Reply By: Member - Nick (Kununurra) - Saturday, Aug 26, 2006 at 13:01

Saturday, Aug 26, 2006 at 13:01
You guys could solve all your tyre problems by buying a set of GOODYEAR MTR's lol
Seriously though,they are the tyre of choice up here and we have now done over 10000kms touring ,mostly all back stony tracks,sand , not much mud yet but it is coming.The MTR's are great,no sign of any marks on tyres(except spare under vehicle,thanks very much toyota).Parents were up visiting and they punctured two tyres and destroyed another while touring with us(dunlop tyre) It would take alot of convincing to change .
AnswerID: 191121

Follow Up By: Member - Stan (VIC) - Saturday, Aug 26, 2006 at 13:54

Saturday, Aug 26, 2006 at 13:54
The problem is that they are listening to Coopers ads and not people who used
them in outback.....

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FollowupID: 448845

Reply By: Neil & Pauline - Saturday, Aug 26, 2006 at 16:25

Saturday, Aug 26, 2006 at 16:25
Go and have a look in the tyre dump of any tyre place in Alice Springs and you will quickly take some brands off the shopping list.

Neil
AnswerID: 191137

Follow Up By: pprass - Saturday, Aug 26, 2006 at 17:37

Saturday, Aug 26, 2006 at 17:37
I'm guessing that you would see just about every tyre brand in that dump so maybe not that illuminating. However if there was a little story attached to each explaining what happened then that would be interesting!
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FollowupID: 448866

Reply By: Member - eerfree(QLD) - Saturday, Aug 26, 2006 at 17:02

Saturday, Aug 26, 2006 at 17:02
sst sst wanna some cheeep tyres??

eerfree
AnswerID: 191140

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