Brown residue on side shoulder of tyres
Discussion
I bought a set of wheels & tyres a while ago to use on trackdays.
Just been on one today (good fun!)
After a few laps I noticed the outer shoulder (and the inside shoulder as well I guess) was going brown, like it's getting covered by a brown oily residue which is coming out of the tyre.
Worse on the tyre that was getting hottest. (rear right)
Comes off easily, and it's just a very thin film on the side/shoulder so no effect on handling, but I've never noticed it on any other tyre I've had, and after a quick look at everyone elses tyres only one showed the same kind of thing. (out of 50+ cars)
They're Michelin Pilot Sports (the first ones) so a few years old now.
Nothing to worry about? Signs that the tyres are past their best? Anti-ozone stuff built into the tyre which is designed to come out to counteract the ozone in the air, and goes brown on contact with air? (found on google)
Just been on one today (good fun!)
After a few laps I noticed the outer shoulder (and the inside shoulder as well I guess) was going brown, like it's getting covered by a brown oily residue which is coming out of the tyre.
Worse on the tyre that was getting hottest. (rear right)
Comes off easily, and it's just a very thin film on the side/shoulder so no effect on handling, but I've never noticed it on any other tyre I've had, and after a quick look at everyone elses tyres only one showed the same kind of thing. (out of 50+ cars)
They're Michelin Pilot Sports (the first ones) so a few years old now.
Nothing to worry about? Signs that the tyres are past their best? Anti-ozone stuff built into the tyre which is designed to come out to counteract the ozone in the air, and goes brown on contact with air? (found on google)
pacman1 said:
Rubbing the wheel arches?
On the outside tyrewalls? Hope not!I'm interesting in the consensus because my Wanlis have this on them too, and I'm trying to work out if it's the culprit for them being lethal in the wet. Maybe it's the dogs
t they're made of starting to melt back out..Leptons said:
SVTRick said:
LuS1fer said:
If you leave your car out in the sun, your sidewalls will eventually go a brown colour.
You are having a laugh ..... Jonny1984 said:
My old Parada Spec 2's used to do this. I always assumed it was the tyre gel I used on the side walls going "off" My current Michelin Exalto's haven't done it yet.
Could be, I don't know if / what the previous owner used.My "road" wheels & tyres get tyre dressing on them once every couple of weeks and don't do this.
Mine get this, mainly on the Pirelli P6000s on the back, I assumed it was the poo like nature of them trying to escape the shame of being associated with P6000s. It cannot be tyre dressing as I rarely even wash the car, let alone dress the tyres! The uber budget acceleras on the front do not suffer so bad with the brown residue. So I guess they are made with less crap.
No idea what exactly it is, but I always thought it was just a sign a tyre had gone through a few heat cycles. Seen it on all cars I've had; usually after a long run on a hot day.
Clio would be front tyres only. Elise all four. The latter used its tyres much more evenly.
ETA - It is not tyre dressing. Never put that cack on my tyres!
Clio would be front tyres only. Elise all four. The latter used its tyres much more evenly.
ETA - It is not tyre dressing. Never put that cack on my tyres!
fwaggie said:
Leptons said:
SVTRick said:
LuS1fer said:
If you leave your car out in the sun, your sidewalls will eventually go a brown colour.
You are having a laugh ..... Plus some stored tyres on the container roof.
They are still as black as the day they were born....
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