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  1. #1
    Moleculo's Avatar
    Moleculo is offline Porsche Orator 1,000 post club
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    Tire Bulge - cause for concern?

    I noticed that there's a slight bulge on the front passenger-side tire. It looks like a little bump. The tire seems sufficiently inflated, but the bulge bothers me. Should I take it to the dealer to get the tire re-inflated?

    Mike
    2006 Midnight Blue Cayman S


  2. #2
    SJD's Avatar
    SJD
    SJD is offline Porsche Activist
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    I'm no tire expert but I'd say yes. Whenever that's happened to me it was a rubber separation inside the tire and it needed tobe replaced. -sjd

  3. #3
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    Could be a sign of belt separation (I had a pirelli do that on an old boxster), so yes I would have it checked out, especially if it wasn't there before and now it is.

  4. #4
    Moleculo's Avatar
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    Left a message at my dealer. Hopefully they can get me in today. Is the car safe to drive?

    Mike
    2006 Midnight Blue Cayman S

  5. #5
    mpollard's Avatar
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    Do it today. You don't want to be dealing with a bad tire over the long holiday weekend. And, most importantly, you don't want this tire blowing out while doing spirited driving.

  6. #6
    Moleculo's Avatar
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    Agreed. I'll press them to get me in today. Would they have to change both front tires or just the defective one?

    Mike
    2006 Midnight Blue Cayman S

  7. #7
    RussK's Avatar
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    Something like this is too unpredictable, have it looked at and get it replaced. There shold be no questions asked.


    Russ

  8. #8
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    Mike,



    It will depend on the milage you've put on, but if you just got your car, and put on less than, say 2,000 miles, it should probably be okay to replace just the damaged one.



    brad
    22-year PCA Member
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  9. #9
    Moleculo's Avatar
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    Just had a talk with the service department. Could be that I hit something really hard but they'll take a look at it to be sure. Bringing it in on my lunch break.

    Mike
    2006 Midnight Blue Cayman S

  10. #10
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    Mike, be mindful that the tires are on a separate warranty from the tire manufacturer.



    brad
    22-year PCA Member
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  11. #11
    mpollard's Avatar
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    Regardless of who pays to fix this, your car and your life are worth taking care of this problem now. You have the satisfaction of having noticed the problem before it became a more serious issue.

  12. #12
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    evoke is offline Porsche Enthusiast
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    Yep, as others have said, get it fixed! Your life is worth more than the cost of a new tyre! (or should I say 'tire' ?).

  13. #13
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    Just had a talk with the service department. Could be that I hit something really hard but they'll take a look at it to be sure. Bringing it in on my lunch break.


    The tire will have to be replaced. These bulges are usually cause by hitting something like a curb or road dot......the short sidewall of the tire gets pinched between the object and the rim causing a cord breakage inside the sidewall of the tire.......no way to fix. I could see this being real common on 19's as the 18's would have a bit more give. With not that many miles I would think just the one tire being replaced would be fine......just make sure it's the same brand & spec.
    ---------------------

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  14. #14
    jaica's Avatar
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    I had the same problem and I have a tire on order. My tire is the same brand, size and model, but I do not think it is N spec. Any comments It is a Michelin235/35/19 PS2icon.


    Thanks for any help
    Having fun in Puerto Rico

  15. #15
    Moleculo's Avatar
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    Took the car in today. They will replace the tire. $380 was the estimate. Will be getting back the car tomorrow, hopefully. I'm driving a loaner now. Wouldn't have to if my M3 wasn't getting surgery.

    Mike
    2006 Midnight Blue Cayman S

  16. #16
    gemars's Avatar
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    Jaica -- BE SURE YOU GET THE N-SPEC TIRE!!! I've dealt with this before, and even in Michelins, the same model tire, same size but not N-Spec'd is NOT equivalent. In some brand, there are compound or tread differences, some of which may be subtle, not obvious to the casual observer, In my case, the non N-Spec tires couldn't be properly balanced -- passed on high speed dynamic balancing, but could get road force into specifications, and on a light car like the Cayman or Boxster, the cars will bounce and vibrate. I do love my 19" Mich PS2icon's for road use, but too soft for track. I have a set of Boxster S 18" wheels with Conti Contact Sport 2's and they're getting yanked for Hoosiers for the track. The Conti's are ok, but nowhere near the tire the Mich is. And I agreee with immediate replacement of a tire with a bulge. I once hit a brick on the highway in my "65 Triumph Spitfire with Pirellis, and it took about 1 week for the bulge to become evident, and while in the lot waiting for the lift to change it, the heat (Arizona in July) ruptured the tire through the separation. It would have been too exciting had that happened on the highway, and the urine smell is so hard to get out of the British Leyland upholstery! Greg

  17. #17
    Santa Fe's Avatar
    Santa Fe is offline Cayman Enthusiast
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    Jaica - gemars is correct. Please see: http://www.caymanclub.net/article_read.asp?id=82

  18. #18
    Moleculo's Avatar
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    Would the service department know this or should I assume they don't?

    Mike
    2006 Midnight Blue Cayman S

  19. #19
    screamingelvises is offline Porsche Enthusiast
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    Would the service department know this or should I assume they don't?

    The Porsche Dealer should be aware of the 'N' designation and should only stock 'N' designated tires. If they are getting the tire from Tire Rackicon and a lot of dealers do (you can check to see what you should pay for the tire before shipping and handling by going to www.tirerack.com, they get a cheaper rate than what is published) they will also know what to put on your car. I don't work for Tire Rack, but they are pretty knowledgable.


    Good Luck!


    Mark





    Elvis Has Left The Building, can you smell the tire smoke???!!!....
    2008 911 Carrera S Cab (Meteor Grey)
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  20. #20
    Moleculo's Avatar
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    I like Tire Rackicon too as I get all my tires from them, but do they stock the N-designated tires though? I called my service department and they said they are aware of the N so I'm relieved. Can't wait to get my car back. I miss it.

    Mike
    2006 Midnight Blue Cayman S

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