One Flat Turns to Four

[Grant Lenahan]

You won't necessarily notice anything, but it does add wear and heat on the differential, and contributes to a delta toward traction control, ABS/etc detecting - wrongly - slip.

Grant
On May 2, 2012, at 5:30 PM, Stephen Kormilo wrote:

> Brian,
> 
> I had something similar happen to me a few years ago, with about the same difference in tire wear. I just replaced the blown tire with the same make/model. No problems in many kms of driving.  You will find that a radius difference of 3/32" makes very little % difference in the circumference of the tire. As usual, YMMV, but I think replacing only the damaged tire is the way to go, unless you cannot get the same make/model of tire.
> 
> I'm now due to replace the set, because the tire model has been discontinued, even though the 'newer' tire still has some tread on it.
> 
> In short, I vote for replace one tire.
> 
> Cheers,
> 
> Stephen Kormilo
> Comox, BC
> Canada
> 
> Silver 2002 Audi A4 3.0QM
> Now Departed: Silver '98.5 Audi A4 2.8QM
>                            Black '85 Mazda Rx7 GSL-SE
> 
> email: stephen at kormilo.ca
> 
> 
> On 01/05/2012 12:00 PM, quattro-request at audifans.com wrote:
>> Date: Mon, 30 Apr 2012 21:58:44 -0700
>> From: Brian Pleet<bpleet at telusplanet.net>
>> To:quattro at audifans.com
>> Subject: ,
>> 
>> 
>> 
>> Cheers,
>> 
>> Stephen Kormilo
>> Comox, BC
>> Canada
>> 
>> Silver 2002 Audi A4 3.0QM
>> Now Departed: Silver '98.5 Audi A4 2.8QM
>>                             Black '85 Mazda Rx7 GSL-SE
>> 
>> email: stephen at kormilo.ca
>> 
>> 
>> 
>> Message-ID:
>> 	<CAEQmpode8T4P=fzUNJm1CerWr_A_pp=oxFduTex1fsHzRyJ6Zg at mail.gmail.com>
>> Content-Type: text/plain; charset=ISO-8859-1
>> 
>> I blew a tire on my 95.5 S6 traveling between Calgary and Vancouver last
>> week. I heard a clunk, my aftermarket tire pressure monitoring system
>> started beeping and I watched the pressure drop. Unfortunately, that
>> stretch of the Trans Canada highway is the worst across the country with
>> hanging wire nets to catch the rocks tumbling off the mountain. I chose to
>> drive on, aware of the price of a ruined tire. Five km later I stopped in a
>> safe place and changes the Blizzak winter tire with one the summer wheels I
>> was transporting.
>> 
>> First I'm told you have to replace tires in pairs, to minimize imbalance
>> side to side. I ordered two replacements. Now I'm told that you have to
>> replace the entire set, one for four because the quattro system would be
>> upset by different tire radius. The blown tire was 7/32 tread depth, the
>> other side was 7/32 and the two remaining are 8/32 left out of a starting
>> depth of 11/32.
>> 
>> Two or four? Suggestions?
>> 
>> -- Brian Pleet bpleet at telusplanet.net 95.5 S6 02 TT Roadster 90 90Q
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