I have uneven tire wear on my rear tires. It's worn at the inside edge of both rear tires, I assume that means too much negative camber could be part of the problem. Current camber settings are -1.6 deg for both sides. Alignment specs from the shop says min and max range from -1.7 to -1.2, so it's in spec. I've lowered the car with PSS9's and have 315/25-19 tires on it.

Anyone else having similar wear problems and if not, what are your rear camber settings? For street driving, no track.

Mark

 

What do you call uneven, Is it just wear on the insides of both rear tires?

 

I think this is just normal for Porsche to have inner tire wear like you describe. All the weight is in the rear, and the geometry of the suspension with the factory tolerance of negative camber is going to wear those rears quick. I have -2 degrees with PSS9's at ROW height, and had my mechanic dial in that neg camber to prevent any tire/fender rub with my 315's in the rear. Plus the car handles so well.

 

Agreed! This is normal, his setting seem correct! I think it just pisses ppl off when they think they have good tires until the see the inner edges. Mine were through the canvas on insides.

 

Yes, it's uneven in that it's almost down to the the cord on the very inside edge, about where the tread meets the sidewall. The outside of the tire still has plenty of tread, maybe 5/32 left. This is my first 911, maybe it's normal. Just seems a bit extreme.

Mark

 

Your camber is at the max recommended, so adjust it for less negative
camber. Also, figure out how many miles you've run to wear them down
so far, and then, when you get new tires, after about a third of that
distance on the new tires, go to your tire shop and have them dismount
and remount the tires inside-out so you get more out of them.
Think of the issues I have: I run with 2.7 degrees negative!
Joe

 

Mark, you can always balance your tire wear, and take advantage of your current cabmer setting, by being much more aggressive in the corners.

 

What he saiD!!!

 

He Kiko, these settings (especially front of car) you passed to me are awesome!

Thanks again mate

Suspension set up: Kiko is your man.

 

Glad you're happy Steve. The more you get used to the cars new handling the more you'll enjoy it, get the GT2 rear bar for neutral handling making throttle steering a joy.

P.S. Since the toe is on its limits therefore on the verge of maing the car darty don't forget to check the toe (easy and inexpensive 2 wheel alignment no need for the complex Porsche routine) now and then, every 5k miles or so depending on the use.

 

i have exactly the same set up.... same rims and tire size... and the pss9s....
I had had it at -2.1 and had the car redone to -1.8 camber... but I still get considerable tire wear.

 

What is ROW height anyway? How much drop (F&R) from standard US height?

 

Mark, that is normal and "the way it goes" for this car if properly set up. I would do what Joe recommends. I usually switch my tires side to side several times before new ones and you avoid the inner wear through for quite some time like that.

 

Even though they are one directional ?

 

yah, my contis have "inside" and "outside", so I dont think you'd want to switch them around. Inside tire wear is completely normal though.