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Porsche 911 Tires and Wheels

chile96chile96 Posts: 330
Guys, check the inside edges of the rear tires. the amount of neg camber on the rears will hardly produce any wear on the out visible edge but strip the inside bald pretty quickly. i too once thought i would be able to forego the expense of new tires every 10-12K miles but i learned otherwise one day when i lifted my car up in the air and discovered teh inside edge was showing cords.

now the fronts, i usually can get atelast 15K if not 20K out of them, rears - the best i ever got was 12K....and this is sampling with 3 different porsches. don't even get me started on the 20" cayenne tires - ugh
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Comments

  • habitat1habitat1 Posts: 4,282
    Appreciate the heads up on the greater inside edge wear, but when I had my car in for a 1 year, 10,500 mile service, the dealer claimed that I had at least 60%+ treadlife left on the rears then. We looked at all of the tires with the car up on the rack. Also, he wasn't saying 60% left until they were dangerously low on tread, but rather where he would replace them for performance. Using my fingers as a guage (highly scientific, I know), the tread depth at 10k+ miles was at least 75% of a brand new car.

    I haven't taken the car to a track and a fair amount of my mileage is highway, so perhaps I'm just being easier on the tires than the average 911 owner.

    Also, chromedome - I'll give you credit for self discipline. I find my 911 to be such a "friendly" driver, that it's taken 3/4 of my miles over the last year and my Acura TL 6-speed barely 1/4. My two daughters have logged substantially more miles in the back seat than you have on your car in total. :surprise:
  • tagmantagman Malibu, CaliforniaPosts: 8,441
    Also, chromedome - I'll give you credit for self discipline. I find my 911 to be such a "friendly" driver, that it's taken 3/4 of my miles over the last year...

    When we all make that choice between our different vehicles as to which car we'll drive, it's often hard to turn down the Porsche. As you said, it is "friendly". I'll add "fun" to the mix.

    For me, when the weather is nasty, I notice that I'm less likely to take the Porsche. But living in California, most days are nice, so the Porsche gets the nod, and quite often the top goes down.

    And there is definately something to be said for those back seats, cause when the kids are a factor, the 911 still delivers.

    TagMan
  • mikejgmikejg Posts: 1
    Guys

    I am not sure where you drive your Carrera 2s or on what tires, but mine used to do 6k miles on the back and 20k on the front with Continentals. In an attempt to stem the money drain, I have switched to Bridgestones and I might get 10k on the back. I can tell no difference at all on the wet or dry handling or ride. Anybody got any better ideas?
  • hotrod81hotrod81 Posts: 16
    My 2006 C2S has pzeros, and with 5000 miles, they hardly look worn at all. Should have a better idea as to how they hold up sometime this summer.
  • habitat1habitat1 Posts: 4,282
    I rechecked my rear tires over the weekend with the highly sophisticated, "stick your fingers in the grooves" method of gauging tread depth. I have the original Pirelli P-Zero's (235/35 front, 295/30 rear) with 12,400 miles.

    The good news is that I have what appears to be very even tire wear. No difference in depth inside vs outside edges and both rears were the same. However, they are definitely more worn, with shallower tread than the fronts (est. 1/4" for rears, 3/8" for fronts), and my optimism that they would last another 5-7k+ miles may have been premature.

    When I get a chance in the next few days, I'll take the car to the local dealer - one of the service techs is a "track" guy - and see what he thinks. My guess is new tires will be needed at 15k+/- miles if I don't want to milk them past optimum performance.

    Obviously, how you drive your car makes a huge difference in tire life. My 12k+ miles have been pretty easy - no track time, a little "enthusiastic" driving, 60% highway miles on fair to good roads.
  • fedlawmanfedlawman Posts: 3,118
    "My 12k+ miles have been pretty easy - no track time, a little "enthusiastic" driving, 60% highway miles on fair to good roads."

    Can I have your cab when you're done with it?
  • habitat1habitat1 Posts: 4,282
    "Can I have your cab when you're done with it?"

    How about next week?

    I went to my Porsche dealer today to have the service manager look at the tires and he now claims the rears are ready to be replaced. Pretty odd that, at 10,711 miles (oil change/service) they "look great with lots of tread life left" and now at 12,415 miles they "should be replaced as soon as possible". Sounds fishy, but unfortunately, I think the current assessment may be correct. I'm going to try getting a qualified second opinion from someone that doesn't sell tires. After giving me the bad news on the rears, he did say the fronts "look good with lots of tread life left". :surprise:

    In any event, while I was waiting for them to put it up on the rack, I checked out two unsold 911 Turbos they have in stock. GT Silver and Slate Grey, both 6-speeds, with $131,000 to $133,000 stickers. We hit 75 degrees here today, so neither of them looked quite as good as my Cab S with the top down, but they are tempting.

    If anyone is looking to "trade up", check out Rockville Porsche. The salesman said they weren't discounting them as they were "extra" allocations from Porsche, but that's the same thing they said in August 2005 when I was Cab S shopping. A little sidebar with the Sales Manager reminding him that I bought from another dealer 50 miles away at a $10,000+ discount in September 2005 ought to loosen them up a bit. ;)
  • fedlawmanfedlawman Posts: 3,118
    "How about next week?"

    I was hoping for a little more depreciation. 2 years from next week should work.
  • kyfdx%40Edmundskyfdx%40Edmunds Posts: 25,879
    Hmmm... I saw a '99 911 for $28K the other day...

    Guess I'll be ready in about six more years... Maybe about the time you are done with it, fedlawman..

    Moderator - Prices Paid, Lease Questions, SUVs

  • habitat1habitat1 Posts: 4,282
    I have been told by Tire Rack and my Porsche dealer that the OEM Pirelli P-Zero Rosso 19" 295/30 (N rated for Porsche) rear tires for my 911S Cab are completely out of stock and on back order. There is no word from Pirelli as to when they will be available.

    Replacing just the rear tires with Michelin or another brand is not recommended, unless you replace all four tires. Given that my fronts are only about 50% worn, I don't want to throw them out.

    Has anyone run into this issue and/or considered replacing the rears with 305/30's (standard on the Carerra S4)? Apparantly they are in stock, albeit in low supply.
  • designmandesignman Posts: 2,129
    You need to look at the inside tread and shoulder. I’m not sure about this but I think the rear tires on Porsches have some toe-out which means the inside edges wear much faster. This is in addition to the negative camber. Your tire wear is not inconsistent with what I have heard. However I suggest taking a close look at the inside edges. Did he point out the area of wear when it was on the rack?

    With regard to the 997 Turbo, here are some anecdotal notes. Last week I was stopped at a highway gas station and a gent pulled up in a 993 Turbo. I chatted with him and he told me he had a 997 Turbo but didn't like it and dumped it. Recently I had my Boxster in for service and noticed two used 997 Turbos on the showroom floor. I am not suggesting anything other than my outlook is to be vigilant with all new models. You can take a considerable hit on them. It happened with the 996 Turbo and 996 GT3.
  • designmandesignman Posts: 2,129
    Replacing just the rear tires with Michelin or another brand is not recommended, unless you replace all four tires.

    Do what you want but I'd have no problem replacing front and rear with different brands. The logic is to keep symmetry on the axle. Plenty of people do what you are considering when switching brands. Front-to-rear is asymmetrical to begin with when you consider the front/rear differences in tire sizes, suspension settings and wheel angles.
  • habitat1habitat1 Posts: 4,282
    Thanks for the input - another tire store rep here told me the same thing - Michilins in rears and Pirellis in front would be O.K.

    However, my dealer, before finding out the 295/30's were out of stock, quoted me a very good price on the Pirelli's ($360 vs. $440+ at Tire Rack). So I'm going to see what he comes back with on the 305/30's Pirelli's. I have to believe they will fit fine, since they are standard on the C4's and even on the C2's, there is a 5mm "spacer option to push the tires out further in the wheel well. I don't have that option, so I doubt I will have a rubbing problem just going to 10mm wider rear tires. It might actually make my speedometer more accurate, given that it reads 70 when I'm actually only going about 65. Any thoughts on the 305/30's idea?

    P.S. The Michilins are in the $480 range. A friend has the Michilins on his 911S Coupe, and I'll be darned if I can tell the difference. Supposedly lower road noise, but on a Cab, that's not a major factor.
  • designmandesignman Posts: 2,129
    I'd probably want to stick with the 295s because they're enormous as it is. If you go with the 305s just make sure they are set up within spec but I am sure you realize this.

    It seems preferences among owners are split between the Pirellis and Michelins. I've heard that the Michelins last longer. Seems those PZeros melt away quickly in comparison.

    BTW, I also heard that TireRack won't be getting Pirellis for the 997 or perhaps all P-cars because Porsche allegedly has an exclusive arrangement with Pirelli. I have no idea whether this is rumor or fact. I read it in the blogs. Seems odd.
  • habitat1habitat1 Posts: 4,282
    Tire Rack has the Pirellis in the 305/30 size (specifically for Porsche) in stock. They are the standard tire on the C4S (same exact wheel) and according to the Tire Rack advisor, will fit the C2S without any problem. Approximately $25 per tire more.

    Haven't decided what to do on the Pirellis vs. Michelins, as I still prefer not to mix and match brands (not sure why) but at least there is an option. I'm going to try to get an unbiased opinion on my tread life later this week.

    Also, I called Porsche North America cutomer service, just to see if they were aware of the situation and had any advice. It took awhile to get the rep to understand that I wasn't asking him to come to my house with tires under his arms. I just thought management should know that I got 5 completely different responses from 4 different dealerships on availability and alternatives. Supposedly, I'm to recieve a follow up call from Porsche later this week after they investigate the matter and give me an "official" response. At this point, I'll just take a free Porsche hat and figure it out myself.

    Thanks for your feedback/suggestions. I'll try to get an extra hat for you. ;)
  • habitat1habitat1 Posts: 4,282
    Well, low and behold, my Porsche dealer magically came up with a pair of Pirelli 295/30's that will be "released" by Porsche North America to be shipped from their designated distributor out of their "private stock". And, even more amazing (given Porsche mark-ups) they are selling them to me at a price $20 less than the Tire Rack price.

    I guess the call to Porsche customer service paid off - they must have rattled the cage of the dealer for giving me some poor information and I'll have new tires next week. But no free hats. :cry:
  • designmandesignman Posts: 2,129
    Sounds good. The squeaky wheel gets the grease. Guess I'll have to pop for the hat though. ;-)
  • I'm in the Chicago area and am going to try driving it this winter. Any tire recommendations?
    Thanks.
  • I bought my first Porsche, a 2003 911 Cab in June in Denver. It was in immaculate shape with 8600 miles. I now have 12,500, including the 1200 cross-country drive home. My right rear went flat yesterday, and would not take air. After removing it to put on the spare, I was shocked that the inside shoulder was worn down to the air, and the sidewall had broken down, fortunately while my car was parked. The fronts look good, but after inspecting the left rear, it is in almost the same condition as the right. I assume from the car's condition that the original owner drove the car easy, and I have as well, with mostly in town driving and some highway.

    I am replacing the two rears, and presently have Conitnentals all around. The rears are 285/30, ZR 18. I have a price of $782 to install the same tires. Any recommendation on going with something different, including mixing brands? I am interested in the longest life available for the price, but in retrospect, think these probably should have been replaced at 8,000. Any advice is appreciated. Thanks.
  • habitat1habitat1 Posts: 4,282
    I replaced the rear tires in my 2005 911S at 12,800 miles, which, I understand is about average for easy driving.

    I went with the same OEM Pirelli P-Zero Rossos that were on the car at a price of about $1,050 including tax, mounting and balancing ($80 per tire at my dealership).

    Of the three options for my car (295/30 19"), Michelin Pilot Sports were considered by most to be slightly better (handling and tread life) and slightly more expensive than the Pirelli's. A minority prefer the Pirellis for dry handling. But Continentals, although significnatly cheaper, are considered well below either the Michelins or the Pirellis. My selling dealer won't even install them, having had too many complaints about poor performance.
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