C4S tire life

Pardon me if I've posted about a topic previously discussed, I'm still a newbie Just wondering what people are getting for rear tire life on 295/30/18 PS2s Just replaced mine again after 7000km Insides worn down to carcass Running factory acceptable alignment About -1.2 camber in rear

It depends on the tire and on your driving style in addition to alignment and camber settings. Are you driving on the track or only on the street? Do you do mostly highway driving, or are there some curvy roads in your normal drives? Do you push the car hard? With N spec tires, I was generally seeing about 7,000 miles out of a set of rear tires and about 14,000 miles out of a set of front tires.

Tires are N3 Normal city driving probably more straight than curves Alignment per spec Not during aggressive enough maybe to straighten out the tire patch in the corners and wear them out more evenly on the rest of the tread I got 7000km That's like 4500 miles

What spec is your rear toe set at? What brand/model are your tires? What pressures do you run? Two things people do to get more life out of the rears: Increase rear toe and/or decrease rear tire pressures.

Tires are Michelin pilot sport PS2 Factory pressure 36F/44/R Rear camber is -1.2L -1.4R Rear toe is 0.17L 0.19R rear Total rear toe is 0.36

People often overlook the 36/44 pressures which are actually spec'd for a fully loaded car. And some also run those to try to make up for their soft suspensions. Do as you wish but maybe try experimenting with tire pressures. I know there is no way I can run past 38psi on my gt3 co's without the rear dancing around for example. As for rear toe, not a whole lot you can do unless you get adj toe links but the alignment place may be able to coax a bit more out of it.

I have gone through 3 sets of rear tires. Two were PS2s and the last was a PSS. The PSS have lasted longer (over 30K km) but I still managed to get 25K km on my PS2s. Obviously I run them until they are at the wear bars. I drive the back roads as spirited as feasible and use the tires for several track days a year. I push the car hard and am thankful that my car has PSM. But sadly the majority of the miles are still in a straight line due to mostly-boring Ontario roads. I usually run ~38psi on the rear tires and ask my alignment guy to maximum toe but within the 996 specs.

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No experience with the PS2's on my AWD Turbo but with other brands -- N-rated -- I have managed to get over 20K miles from the rears, and double that from the fronts. You have to be careful about "factory alignment". There is some differences of opinion as to just what this means. I must dig out some of my alignment printouts and post what numbers I have found deliver exceptional tire life. While the numbers are factory they involve less toe in at the rear then some techs seem to favor. Lots of toe will have the rears gone in practically no time. While I do not have the numbers at hand the worst alignment -- "factory" done at a dealer but with no printout (which in my experience always is a precursor to shorter tire life) -- had the rear tires gone in around 8K miles. The best was around 23K miles and the tires had more life but one tire picked up a nail. I had road hazard coverage and believe it or not the tires had 3mm of tread left which qualified the one tire for free replacement. I had to of course pay for the other tire.

So I'll try setting rears at 39psi anyone have suggested rear toe settings? How about camber? I'd like to get it aligned better to maximize new tire life If I could get 12-20k km on a set of rears that would be ideal I have RSS rear adjustable dog bones and toe steer kit on order this should allow for more adjustment

Is your car lowered by chance?

Stock suspension Not lowered Only mods are RSS engine mounts and Tubi/fabspeed exhaust and fabspeed carbon intake

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Mine did the same. Needed to have the alignment redone. Stock is way to aggressive in camber and too much toe safety for daily driving. There is plenty that can be dialed out on a stock setup which will help with wear. Once you lower it, it will be harder to dial the camber but it can be dialed out some. Camber plays only a small role in wear, toe is usually the killer. Having more negative toe provides more stable straight speed, where less toe will make the car less stable when going straight.

Alignment done Less camber and fixed front and rear toe Fingers crossed I'll get more than 7k km out of this set Though soon switching to winters so it will be next summer/fall when I find out

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So was the toe out of alignment? Did they give you a spec sheet or do you have the numbers by chance?

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??? I'm interested as well

Rear camber us now around -0.8 I'll check the specs tomorrow and give you the rear toe Previous specs noted above in my posts Front toe was also out

Checked the printouts Rear toe is now 0.20 was 0.1 Rear camber is now -1.4 was -1.2 and -1.7 Front toe is now 0.06 was 0.02 Front camber is now -0.6 was -0.02