Thread: Cooper ST (Sure Trac) tyres - good & bad experiences wanted

If you are going ATs I would recommend BFG or Pirelli. For MTs Cooper STT or the MTZ or BFG MT's.You should be able to find a similar size tyre in either of these. There is a link to a tyre size calculator on a thread here that I posted last week. I will see if I can find it, this should be able to tell you what tyres are actually similar rolling diameter and will fit. You could go 235/75/16 as these would be close to diameter just not as wide.
Tire size calculator

Originally Posted by LRHybrid100

G'day Guys,

I am looking for a AT tyre in a 255 / 85 x 16 size - would buy BFG ATs but they dont come in that size but Coopers do.

I know there has been recalls on 285 / 75 x 16 ST Coopers in the past - due to delamination of the tread but hope this is all in the past.

Pls post up your experiences - both good and bad with the Coopers ST tyres

THX

LRH

Not in the past...

Had a guy with a delamination last week....

DONT BUY COOPERS....

Done 10,000 now, They are quieter than BFG MT. Not evidence of any issues. They are mounted on a 16" RR Alloys. 2 of them constantly go down and I've not worked out why yet.

In the sand with 18 psi in them they are excellent, On e harsh gravel road they have been excellent too. They understeer a bit but I just figure I should stick the slipper into it a bit harder.

Cheers

Originally Posted by tombraider

Not in the past...

Had a guy with a delamination last week....

DONT BUY COOPERS....

Mike,
Any more info cause if this is happening again it is a huge concern.
What batch of tyres, current or old, kms etc.
Were there any other issues, inflation etc.
I know if they do not leave the tyres to cure long enough it causes this type of issue with bonding of the tread.
Just when we thought that was in the past. Does not apply to me as I dont run the ST's, but still worrying.
Thanks
CraigE

I could be wrong, but I thought Cooper had dropped the ST in 255/85 ??
Pretty sure the newer version of the STT isn't available in that size, either.

AFAIK, the only tyres available in that size in Oz are the BFG MT and Maxxis Big Horn 762 ?
In Europe and possibly the US there is a much wider range available in that size.

As far as experience, we had the ST's on SWMBO's Patrol as it's second set of tyres. They were a major improvement on the Bridgestone 693 Duellers fitted OE.
No major issues using it on the farm and crook gravel and secondary secondary roads around here, quite good when you got a bit of wheelspin going in the mud here, no major chipping, either, but the sidewalls developed micro cracking all the way around within two weeks of fitment
Micro cracking developed between the tread blocks a little later.

With their reputation for tearing tread blocks and delaminating we went with other tyres thereafter. Grip wise they were good for an AT, and better all round than BFG AT's and a world better in mud. The BFG's have out lasted them by on averaqe 10-15,000km using the same roads.

They were also a bastard to mount, having to be blown out with tubes overnight to get the bead out far enough to mount on the Patrol 8" rim (265/75)

I've got Coopers 235/70/16 ST's on my disco they have done about 64,000km now still with 5-6mm tread on them and I really can't fault them I have been impressed with the level of grip I have had on all surfaces mud through to tarmac and would certainly purchase another set.

Both my brother and I have been running 255/85x16 Cooper ST's for a few years now. I was quite surprised by how well they work in the mud. I have chipped mine, but that was due to not letting my tyres down enough on one loose shaley hill that my 90 really struggled to get up. Once this set has warn out, I shall be buying another, and I'm pretty sure that is what my brother will be doing as well.

I have run 2 sets of 235/85R16 STs on my 110's since 2000 plus a set of 265/75R16 STTs.

Very happy with the STs as they have been driven around Oz including the Cape, GRR, Flinders Ranges, High Country etc with no punctures, chipping, bubbles nor delaminations. I switched to Coopers after bad experiences with cracking sidewalls on BFG ATs and MTs.

I have had problems with STTs ripping lugs due to me not airing down on rock ledge climbs.

I still run STs around town and touring . I run a second set of 255/85R16 BFG muds as STTs were not avail in the 255 size last year.