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  1. #1
    Mark
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    Tire Replacement for AWD

    I have read in a couple of places that if one tire goes on AWD you must replace all four tires. Is this True?


  2. #2
    Karl Wolf
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    Re: Tire Replacement for AWD

    It depends on how much tread is left and if the tire is the same size/type. AWD tires have to be very similar in diameter. The system can take a small amount of difference but if you have 3 bald tires and put on 1 new tire you are looking for trouble. Even replacing tires on the front or rear as a set can cause problems with the front to rear bias.

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    Re: Tire Replacement for AWD - Rotation?


    What about rotating tires?

    Do you have to change the rotation pattern? does AWD make the rotation directional?

    First AWD car I've had.

  4. #4
    Karl Wolf
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    Re: Tire Replacement for AWD - Rotation?

    Rotate front to back on the same side. This will even out the wear and you will get the most mileage from your tires. Just make sure they change the tire pressure when they rotate.

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    I disagree.

    As long as you're using the same make, model, and size of tire all around, you should have no problems. AWD isn't *that* sensitive.

    FWIW, I've replaced *pairs* of tires on our '02 model with 50K miles on it and had no noticeable effect - other than somewhat better traction in rain ...--
    C.R. Krieger
    '88 535is - Da Red Dog

    <img src="http://memimage.cardomain.net/member_images/2/web/578000-578999/578895_4_full.jpg">

  6. #6
    tony (France)
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    Re: Tire Replacement for AWD - Rotation?

    I posed this question to my Jag dealer, it shouldn't be done was the response, I cant see why not, tyre rotation was always mentioned in car handbooks, and the way to go about it was shown, including incorporating the spare.
    tony

  7. #7
    Karl Wolf
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    Re: I disagree.with your disagreement

    I stand by my original statements. You are correct that you can replace in pairs but as I said they need to be very close to the same size. I am sure that when you replaced your set the other tires still had reasonable tread so there was not much difference in diameter. You also used the exact same size and type of tire.

    I am posting to help people that may not understand that a 225 45 17 tire from two different manufacturers can actually be very different in diameter. There are many people that complain about noise and vibration on this board and if you mix tires you are just asking for trouble. You are far better off rotating and balancing your tires regularly and then replacing them as a set.

    AWD is very forgiving and that is what is great about it. I am sure that you would never run 225 45 17's on the front and 245 55 17's on the rear. It would run down the road ok for a while but it would be asking for trouble.

  8. #8
    Keith S
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    Re: Tire Replacement for AWD

    Tire diameter is indeed relevant. To the point where Subaru would void warranty on driveline if different brands of tires (even with the same sizes printed on the sides)were on any corner of the car.
    A friend almost had this happen on his Forester, lucky for him the dealership that sold him the car and wanted to void his warranty also sold and mounted the off-brand front tires they replaced!

  9. #9
    DKC-OKC
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    Re: Tire Replacement for AWD - Rotation?

    I also checked with my dealer on the same issue for both of my ALL WHEEL DRIVE cars...The answer was as Karl put it..For even wear, do front to back at 5000 to 6000 mile intervals and maintain even tire pressure in all tires of about 35 to 37 PSI..
    Fact is, I do front to back (same side), then next time I do cris-cross, front to back, then next time front to back (same side) again as well.

  10. #10
    Robert
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    Re: Tire Replacement for AWD - Rotation?

    My dealer agreed that rotation does save wear as we all know, but noted that it is not covered under free scheduled maintenance, therefore I would have to pay to have this done.

    Robert

  11. #11
    chas
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    Re: Tire Replacement for AWD

    re. tyres, you do not have to replace all tyres if one goes, but you might have to replace on the same axle depending on the circumstances. best to get advice from a good dealer especially if AWD - in the UK, protyre in poole did a great job for me when I had a problem with the DSC light coming on - i discovered that very few garages are able to properly do the tracking & steering geometry for 4WD. Also, pirelli is the recommended make of tyre but you can use different tyres; eg. the p zero or the P6000 on the X type, but the same on ech axle - you might contact them directly.
    Hope this helps
    chas

  12. #12
    Karl Wolf
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    Re: Tire Replacement for AWD - Rotation?

    Robert,

    Most tire stores will do it for you at a nominal fee. Most(at least in the US) will offer you a lifetime balancing and rotation for one fee. It will pay you back in the long run with longer tread life and a smoother ride.

  13. #13
    Robert
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    Re: Tire Replacement for AWD - Rotation?

    I am in the US, NJ, what auto places are charging 1 fee for a lifetime of service.... I have not heard of that?

  14. #14
    Karl Wolf
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    Re: Tire Replacement for AWD - Rotation?

    It is for the life of the tires, not the lifetime of the car. Goodyear, Firestone, NTB, Discount Tire, Pep Boys, Sams club, etc. It is offered on tires purchased, and almost always they will offer it to anyone. They want you to keep coming in so they can sell you new tires when you need them.

  15. #15
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    Re: Tire Replacement for AWD

    Karl,

    Picking up off an old thread...

    The official answer from Jaguar is that there should be no more than 3/32nds of an inch in wear between any tire. I found this out because my tire dealer refused to put a new front pair on yesterday because he said the difference would be 4/32" -- too much for Jaguar spec -- my tranny might blow and I'd turn around and sue him.... So he left me driving home on one set of nearly-bald fronts and one set of nearly new rears, as if that's any better.

    I find this tight of a tolerance absurd, but it's Jaguar's gold standard. Having said that, does it mean that if one tire gets a blowout, you automatically buy a set of four and throw the 3 good ones out?

    Also, couldn't you just reduce the tire pressure in that tire by 2-3 pounds and give it a rolling radius equivalent to the other tires?

    --Geoff

  16. #16
    Karl Wolf
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    Re: Tire Replacement for AWD

    Geoff, Some good questions here:

    -- my tranny might blow and I'd turn around and sue him....

    No problem with the tranny..but the differential between the front and rear would work harder and that could fail. The same can happen if you put a brand new tire on one side and an old tire on the other. the differential on the front or rear would work to compensate for the difference in tires resulting in additional wear.

    The way the X AWD works I doubt that the difference you are talking about would result in a failure. It would result in additional drivetrain noise. We all know how hard it is to reduce and eliminate this from the X.

    You have to keep in mind that the 4/32" difference is around the entire tire. This is why it ends up a larger difference than what it seems. This is why I recommend rotating tires even if your dealer doesn't. They don't want to deal with the possibility of additional noise or vibration if the tires are moved. this would be additional work for them. They would rather just have you wear them out and replace them as a set.

    You never want to just reduce the pressure in one tire. Yes it would slightly reduce the diamater but it would also change handling side to side and increase temperatures in the tire. These changes could cause very many problems.(Ford Explorers and Firestone and low pressures)

    I have purchased a matching "take off" tire (used) in the past to match a set (3) of worn but still very good tires after a blowout.
    Just make sure it is an exact match and the tread depth is very close to the other tires.

  17. #17
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    Re: Tire Replacement for AWD - Rotation?


  18. #18
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    Re: Tire Replacement for AWD - Rotation?

    Hi all,

    Iíve done a couple of tyres on my car and itís always on the motorways. By the time Iíve pulled over and stopped the tyre has always been well beyond repair. The PZeroís work out at about £160 each (about $280US).

    Iíve only ever replaced the blown tyre and asked the fitter to match the tyre with the closest of the other three and place it on the opposite side. Iíve never mixed brands or sizes. I run all the tyres (245/40/18) at 34psi and seem to get a good ride on the motorway.

    Have you ever noticed how friendly people are when they see you on the side of the Motorway changing a wheel? They always blow their horn and wave. Only happens when Iím in the XÖÖÖ.Envy, it can be a terrible thing.

    Cheers,

    Noddy
    3.0 SE Man

  19. #19
    Peter
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    Your front tires are to big, and rub right?


  20. #20
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    Re: Your front tires are to big, and rub right?

    Hi Pete,

    If I hold it down on either full lock, yes slightly. They are clear on the rear. I've had the dealer look at it and they said there isn't a problem and nothing to worry about. Five months and 15k later, all ok.

    The tyre problems with punctures related to 'foreign objects'.

    Regards,



    Noddy
    3.0 SE Man

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