Mild Scolding from a Service Advisor
03-27-2018, 06:51 PM
#34
Racer
I had 21,782 miles on my 2015 Carrera S rear tires when they were down to 3/32" and hit the first 2/32" tread wear bar surprisingly on the outside. Even wear side to side with PDDC on all four tires. My front tires still had 6/32" tread side to side so I replaced the rears with matching original Pirelli (NO) P-Zeros. The second set of rear tires should wear out the same time as the two year old front tires.
Now at 30,207 miles my original Pirelli P-Zero front tires still have 5/32” tread left and my second rear Pirelli P-Zero tires have 6/32” tread left . . . even wear side to side. I have always run my tires at the lower comfort setting.
PDCC that keeps each tire’s camber flat really does increase tire wear, they wear evenly side to side even with my heavy foot.
Now at 30,207 miles my original Pirelli P-Zero front tires still have 5/32” tread left and my second rear Pirelli P-Zero tires have 6/32” tread left . . . even wear side to side. I have always run my tires at the lower comfort setting.
PDCC that keeps each tire’s camber flat really does increase tire wear, they wear evenly side to side even with my heavy foot.
03-27-2018, 06:58 PM
#35
03-27-2018, 07:05 PM
#36
Rennlist Member
Running tires down to 2/32 tread depth to the wear bars is IMO dangerous. It may be legal but below 4-5/32, the tires have lost almost all their ability to evacuate water. Dangerous in the rain. It is just not worth it to me to wear tires down that far before replacing them. Tires are far cheaper than paying for the consequences of accidents. Rear tires in these cars are done at 15k miles, 20k max. Fronts have double the life. Others may disagree.
03-27-2018, 10:04 PM
#37
Drifting
I remain amazed at those of you who get more than 10,000 miles out of a set of rears, or more than 20 from fronts. I've only been driving Porsches since 2000, but I've consistently destroyed rears between 7500 and 10,000 miles, without exception. Most have not had any track days on the street tires, or at most two days. The OEM Pirellis on my last 991 GTS were toast at 7500, with only one track day. The worst, as mentioned by somebody above, was 996TT tires -- I think they were Pilot Sport 2s back then. At 7000 they were generally showing a little steel belt on the inside of the rears. But it's not just the big-power Porsches -- my 986S did the same thing.
Unexpectedly, my GT4 is still poking along on the OEM SC2s at 9600, with 3 pretty hard track days since I got it (and they didn't look like they had any track use by the previous owner.) I'm immensely pleased with the wear I'm getting out of those tires (but even still, they're on their very last legs.)
Unexpectedly, my GT4 is still poking along on the OEM SC2s at 9600, with 3 pretty hard track days since I got it (and they didn't look like they had any track use by the previous owner.) I'm immensely pleased with the wear I'm getting out of those tires (but even still, they're on their very last legs.)
03-28-2018, 11:08 AM
#38
Rennlist Member
Thread Starter
Lol!! Well, my first set of Michelins were "SAS" on my 73 Fiat 124 Spider and have never turned away from them. They are a great tire, but I am just used to getting more miles out of them from my past sports cars. It seems like I can going into this season with them and just monitor the depth.
Last edited by Dan Nagy; 03-28-2018 at 11:32 AM.
03-28-2018, 11:10 AM
#39
Rennlist Member
Thread Starter
Per the manual you are supposed to not only have same brand and type, but also same N number, as in replace to N0 if fronts are N0, don't be tempted to go to the newer N1. It wold cause you problems at trade in, car must have matching tires all around down to the N code. So it makes sense to plan ahead, as suggested above.
03-28-2018, 11:21 AM
#40
It's not an act, I promise! Been wrenching on 911's for 25 years and tracking for 15. Some of y'all get your underwear in a twist over imaginary problems you read about on the internet because you don't actually work on cars or understand how they work. Obviously everyone should be free to waste as much money as they like addressing whatever problems they imagine they have, like buying four tires when you only need to buy two.
03-28-2018, 02:17 PM
#41
Rennlist Member
I remain amazed at those of you who get more than 10,000 miles out of a set of rears, or more than 20 from fronts. I've only been driving Porsches since 2000, but I've consistently destroyed rears between 7500 and 10,000 miles, without exception. Most have not had any track days on the street tires, or at most two days. The OEM Pirellis on my last 991 GTS were toast at 7500, with only one track day. The worst, as mentioned by somebody above, was 996TT tires -- I think they were Pilot Sport 2s back then. At 7000 they were generally showing a little steel belt on the inside of the rears. But it's not just the big-power Porsches -- my 986S did the same thing.
Unexpectedly, my GT4 is still poking along on the OEM SC2s at 9600, with 3 pretty hard track days since I got it (and they didn't look like they had any track use by the previous owner.) I'm immensely pleased with the wear I'm getting out of those tires (but even still, they're on their very last legs.)
Unexpectedly, my GT4 is still poking along on the OEM SC2s at 9600, with 3 pretty hard track days since I got it (and they didn't look like they had any track use by the previous owner.) I'm immensely pleased with the wear I'm getting out of those tires (but even still, they're on their very last legs.)
03-28-2018, 04:21 PM
#42
Drifting
Rear tire wear on the 986s I had was abysmal, requiring two pairs of rear tires for every pair of front tires. I think I was happy to get 17,000 miles out of a pair of N-spec summer tires up front—which is why I was shocked to see my GT4's R-compound MPSC2 rears last 13,000-14,000 miles with regular sporting use plus a couple of track days.
To be fair, that was a 986 SE, the 2004 Special Edition with 264hp vs the regular S's 258 or so. So the extra grunt is probably what did it!
03-28-2018, 04:24 PM
#43
Rennlist Member
Thread Starter
Holy crap. How did you ever miss seeing that?
03-28-2018, 04:56 PM
#44
Drifting
I didn't bend down and inspect, just glanced at what I could see, which was the outer edge that still had that one ring of tread. I extrapolated from that that there must be more on the inside! 
In all fairness, car was a sunny-weather-only toy so slicks weren't entirely inappropriate.
In all fairness, car was a sunny-weather-only toy so slicks weren't entirely inappropriate.
03-28-2018, 06:40 PM
#45
Sorry, missed a sort of key point: Half worn at 8500 miles. When service advisors are talking to me about tires with a "scolding" tone, it's time for new tires or getting close to it. So...17,000 miles from the rears, predicted? That's a lot better than 996/997 tires got not so long ago.