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#4467133 - 07/22/17 12:44 PM AWD tire issue
PeterGreen Offline


Registered: 07/31/12
Posts: 236
Loc: New York
So I drive an Acura TL with the SH-AWD system, and have always been careful to keep all four tires the same condition. This system is most of the time operating in FWD, except when the computer tells it to apply torque to the back wheels, and then apportions the torque to the outer tire on curves.

I got an unrepairable puncture right at the shoulder and my current set of tires has about 20k on them, so there is still a lot of life left in them. They are Continental DWS-06 tires, which aren't cheap--around $170 at tire rack and around $200 at a local guy. So I bought one new tire as an emergency replacement so I could get to work.
So now I have three tires that are at half life and a brand new tire. Should I get a second to match the replacement tire so at least both tires on the same "Axle" are the identical diameter and state of wear. Buying three new tires is a no go, I am a married man and the Mrs. would not understand.

Is it necessary to buy tires in pairs or a foursome with this AWD system, I think 99% of the time the front and rear wheels are not locked together while driving, so I doubt there would be much damage to the AWD system by having two newer tires.

Am I over thinking this whole thing and should I just stay with three old and 1 new.

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#4467152 - 07/22/17 01:17 PM Re: AWD tire issue [Re: PeterGreen]
HerrStig Offline


Registered: 08/24/11
Posts: 9560
Loc: Boston, MA
What does the manual say about tire replacement? I'd show THAT to the "Mrs."

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#4467157 - 07/22/17 01:18 PM Re: AWD tire issue [Re: PeterGreen]
newtoncd8 Offline


Registered: 01/18/03
Posts: 872
Loc: Colorado
From your owner's manual:
"It is best to replace all four tires at the same time. If that is not possible or necessary, replace the two front tires or two rear tires as a pair. Replacing just one tire can seriously affect your vehicle's handling."

On Audi and Subaru vehicles, there are additional warnings about mixing tires with different degrees of treadwear that could damage the power train.

The Acura doesn't state that.
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#4467159 - 07/22/17 01:20 PM Re: AWD tire issue [Re: newtoncd8]
Kuato Offline


Registered: 10/23/05
Posts: 7094
Loc: Colorado
Originally Posted By: Curtis Newton
From your owner's manual:
"It is best to replace all four tires at the same time. If that is not possible or necessary, replace the two front tires or two rear tires as a pair. Replacing just one tire can seriously affect your vehicle's handling."

On Audi and Subaru vehicles, there are additional warnings about mixing tires with different degrees of treadwear that could damage the power train.

The Acura doesn't state that.


One option not mentioned in the owner's manual is that you can have the new tire shaved to the same tread depth as the other three...which is what I'd do, considering the option is to buy at least one more tire.
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#4467163 - 07/22/17 01:23 PM Re: AWD tire issue [Re: PeterGreen]
tnt31 Offline


Registered: 10/09/05
Posts: 306
Loc: TN
I have no idea at what it cost but it is my understanding you could have the new tire shaved to match the other three.

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#4467165 - 07/22/17 01:24 PM Re: AWD tire issue [Re: PeterGreen]
JTK Offline


Registered: 08/14/03
Posts: 10596
Loc: Buffalo, NY
I've seen plenty of AWDs with the fronts worn much more than the rears, but we're talking pairs. It almost makes sense to keep one used half worn tire around in the event you have an non-repairable tire.
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#4467168 - 07/22/17 01:29 PM Re: AWD tire issue [Re: PeterGreen]
SatinSilver Offline


Registered: 01/24/08
Posts: 10182
Loc: OH
Which tire was it? Usally the front, passenger side one takes the most abuse from weight and more potholes being on that side. If you do buy another tire then you can save the current one as a spare or sell it on CL.

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#4467173 - 07/22/17 01:33 PM Re: AWD tire issue [Re: PeterGreen]
ArcticDriver Offline


Registered: 01/27/17
Posts: 1139
Loc: USA
I always consider buying a new spare at the same time as new tires as a calculated risk. One I don't always follow and then I read of an experience like yours and...

Thank you for sharing this.

IMO, I would change out 2 tires at a minimum.

I have no experience with the tire shaving cost factor...perhaps someone could chime in?

I suppose some of the equation would depend on whether you are happy with your current tire brand and model and intend to stay with it next time.
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#4467187 - 07/22/17 01:52 PM Re: AWD tire issue [Re: PeterGreen]
ejes Offline


Registered: 01/11/16
Posts: 313
Loc: Kansas
If it were me with this situation with all the options laid out in the previous posts, my top desire would be to replace all four tires if at all possible. Best case would be to replace with exactly what I want or what is on it. However you state that is rather cost prohibitive for you. So, given the costs of 2 or 4 new ones, or a new one and shaving one down, I think I would look for a lower priced quality tire that would would be close to the replacement value of just 2 of the pricey ones I already have (in this case the Conti DWS-06's). However,

My solution then would be 4 new Sumitomo HTR A/S P02 which goes for 97 bucks and some change on Tire Rack. However, buying one tire and shaving it down would be the cost of the tire, mounting, etc. plus around 40 bucks to shave it.

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#4467200 - 07/22/17 02:17 PM Re: AWD tire issue [Re: PeterGreen]
Danh Offline


Registered: 10/16/10
Posts: 1752
Loc: .
TireRack will shave a tire to your specs and sent it to you. That may be a good option- save the new, full tread tire for the for the next replacement cycle.

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#4467202 - 07/22/17 02:23 PM Re: AWD tire issue [Re: Danh]
SatinSilver Offline


Registered: 01/24/08
Posts: 10182
Loc: OH
Originally Posted By: Danh
TireRack will shave a tire to your specs and sent it to you. That may be a good option- save the new, full tread tire for the for the next replacement cycle.


Good idea or call around for tire shops in the area that can shave it.

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#4467205 - 07/22/17 02:25 PM Re: AWD tire issue [Re: ejes]
SatinSilver Offline


Registered: 01/24/08
Posts: 10182
Loc: OH
Originally Posted By: ejes
My solution then would be 4 new Sumitomo HTR A/S P02 which goes for 97 bucks and some change on Tire Rack. However, buying one tire and shaving it down would be the cost of the tire, mounting, etc. plus around 40 bucks to shave it.


Looks like a nice tire. Plus about $60 or so for shipping. Amazon has some Nokian zLine A/S tires for $105 and free shipping. Here is a review of them:

http://tirereviewsandmore.com/nokian-zline-as-reviews/

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#4467216 - 07/22/17 02:44 PM Re: AWD tire issue [Re: PeterGreen]
pkunk Offline


Registered: 03/19/11
Posts: 257
Loc: NM, USA
What happens is the wheel speed sensor tells the computer that it's running at a different speed than the others causing brakes to be applied to prevent the (apparent) skid. Not good for your brakes and the poor computer is having conniptions.
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#4467242 - 07/22/17 03:47 PM Re: AWD tire issue [Re: PeterGreen]
dparm Offline


Registered: 04/19/10
Posts: 13466
Loc: Chicago, IL
Tires on the same axle should be at the same wear level for AWD. This keeps the differential for that axle from working too hard due to a massive difference in grip, rolling diameter, etc.

Front to rear it's less of a problem, but obviously it is a safety risk on any car to run two tires that are almost bald.
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#4467243 - 07/22/17 03:48 PM Re: AWD tire issue [Re: newtoncd8]
Papa Bear Offline


Registered: 08/11/05
Posts: 7054
Loc: Leamington, ON, Canada ..... r...
Originally Posted By: Curtis Newton
From your owner's manual:
"It is best to replace all four tires at the same time. If that is not possible then replace the wife


crackmeup
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