What happened to my tyres??!?

[Prancing Hippo]

Any views on hwta has happened to my Dunlop tyres? I have a Cayenne Turbo S, and noticed the wear on the winter tyres attached. It is only on the front tyres. There is less that 25,000 km on these tyres, and I don't use them in summer. The wear is like this all the way around the inside of the tyre on both front tyres.

[CraigyMc]

Prancing Hippo said:

Any views on hwta has happened to my Dunlop tyres? I have a Cayenne Turbo S, and noticed the wear on the winter tyres attached. It is only on the front tyres. There is less that 25,000 km on these tyres, and I don't use them in summer. The wear is like this all the way around the inside of the tyre on both front tyres.

Looks like they overheated, to me.

[s p a c e m a n]

At a guess, theyre getting too hot. Heavy car on winter tyres flying down country lanes in the dry?

[jimbobsimmonds]

Very easy to do this on winters...

Sister's Peugeot 206 1.9 N/A diesel (slow as as a slow thing can be)on winters... Drove it in the warm weather last week and managed to blister the fronts quite badly.

I would imagine a Cayenne would be much, much worse...

[MysteryLemon]

I ran around on Avon winter tyres a few years back through the summer doing an all motorway commute at temps upto 28 degrees.

Never had any issues.

[kambites]

Looks like overheating to me.

[kambites]

MysteryLemon said:

I ran around on Avon winter tyres a few years back through the summer doing an all motorway commute at temps upto 28 degrees.

Never had any issues.

Was it on something weighing two and a quarter tonnes, though? Besides, I suppose motorways are quite easy on the tyres.

[mrmr96]

On that kind of car I'd expect there to be a decent amount of negative camber on the front, and possibly a bit of toe. These geometry features lead to better grip but increased tyre wear. This is exascerbated on winter tyres because the compound is so much softer. So I think that's the cause of this wear on the inside shoulders.

[MysteryLemon]

kambites said:

Was it on something weighing two and a quarter tonnes, though? Besides, I suppose motorways are quite easy on the tyres.

Possibly. Was a hefty primera p12 estate though. I rarely took it easy either.

[kambites]

MysteryLemon said:

kambites said:

Was it on something weighing two and a quarter tonnes, though? Besides, I suppose motorways are quite easy on the tyres.

Possibly. Was a hefty primera p12 estate though. I rarely took it easy either.

It looks like they weight about a tonne and a half. Plus I'm guessing that doesn't have the most aggressive of suspension geometry setups, which would make the tyre's life easier.

I've run an Astra on winters in 40 degree+ temperatures without any problems (except rather a lot of wear) but I could easily imagine the Cayenne being a rather different beast.

[xRIEx]

MysteryLemon said:

kambites said:

Was it on something weighing two and a quarter tonnes, though? Besides, I suppose motorways are quite easy on the tyres.

Possibly. Was a hefty primera p12 estate though. I rarely took it easy either.

I'm guessing if the OP has done that mainly to the front tyres on a 4WD car, it's more a result of braking a two and a half tonne vehicle. The reason you didn't have a problem on motorway miles may be to due to fewer instances of braking.

[longblackcoat]

I ran winters on a Discovery through last summer - no wear issues at all, though clearly it has way less power than the Cayenne. Weighs a lot more though.

[Petrolhead_Rich]

Prancing Hippo said:

Any views on hwta has happened to my Dunlop tyres? I have a Cayenne Turbo S, and noticed the wear on the winter tyres attached. It is only on the front tyres. There is less that 25,000 km on these tyres, and I don't use them in summer. The wear is like this all the way around the inside of the tyre on both front tyres.

I'm sure they are recommended for use in temperatures of LESS THAN 7 degrees, It's been warmer than that recently, plus as above a big heavy car, likely overheated!

ETA - they look like they are fairly well worn anyway, 3mm if that left?

[kambites]

longblackcoat said:

I ran winters on a Discovery through last summer - no wear issues at all, though clearly it has way less power than the Cayenne. Weighs a lot more though.

What we're looking at there isn't wear, as such, it's blistering. It might have happened over time, but it's equally likely that it was caused by one particular incidence of overheating in one special set of circumstances (particularly spirited driving on a warmish day on a particularly grippy road surface, or something).

I've seen soft road tyres go from new to looking like that in ten minutes on track without having any appreciable wear.

[Prancing Hippo]

Thanks. I live out of UK (Czech Republic) where the temperature and snow means winter tyres are a must (by law as well actually). I also do quite heavy mileage on German autobahns, so if dry etc do motor along at speeds in excess of what one would in the UK for example... Maybe it is heat. One part does look like it melted on one wheel, but I did not get a photo of that. Any recommendations on what are the best winter tyres to get for a car like this given what I use it for? Would different tyres make a difference, or do i just have to change my driving style? Thanks.

[kambites]

Out of interest, what's the load and speed rating on the tyres pictured?

[Prancing Hippo]

kambites said:

Out of interest, what's the load and speed rating on the tyres pictured?

I will check, not sure from memory.

[kambites]

Prancing Hippo said:

kambites said:

Out of interest, what's the load and speed rating on the tyres pictured?

I will check, not sure from memory.

The reason I ask, is that looking at Dunlop's website, the speed rating for their "performance" winter tyre is H, which is only 210kph. If you're driving faster than than on the Autobahn, I'm not particular surprised that they're overheating.

[Prancing Hippo]

kambites said:

The reason I ask, is that looking at Dunlop's website, the speed rating for their "performance" winter tyre is H, which is only 210kph. If you're driving faster than than on the Autobahn, I'm not particular surprised that they're overheating.

That may well explain it...

[kambites]

Prancing Hippo said:

kambites said:

The reason I ask, is that looking at Dunlop's website, the speed rating for their "performance" winter tyre is H, which is only 210kph. If you're driving faster than than on the Autobahn, I'm not particular surprised that they're overheating.

That may well explain it...

I'm not aware of anyone making a winter tyre with a higher speed rating than that, although I've never had reason to look for one. You might find that your only solution is to drive slower.

I suspect driving beyond the rated limit of the tyre is illegal anyway, should anyone actually notice.