[A4] tires, speaking of tires, anyone have any used 17's lay'n around?

[Cody Forbes]

I hate to do this, but I've got some input on this one to the contrary, but 
only minorly and dealing with a different car (still valid info for others 
to read).

One of my 5000's needed tires bad and I was broke (I say that as if I'm not 
now - yeah....right) so I could only afford to do the two worst - replaced 
with same brand same size same model tire. With two tires at about 3mm tread 
and two new tires (matching tires on one axle) there was no perceptable 
driving issues EXCEPT if the center diff was locked for any reason. If I 
were to lock the diff you could feel the binding at parking lot speeds (car 
would STOP with no brake input if you disengage the clutch), and you could 
hear the tires hopping and chirping as they fought each other. Then you 
could not disengage the lock without driving backwards for long enough to 
take the tension off of the center diff - usually about 50ft or so.

Now you may say "but my car is a T*rsen, so I don't have to worry about 
that". Think about it though - if theres enough differance to case such 
commotion in that situation at what road speed do you think the rotational 
speed is different enough to engage the T*rsen??? Speculation of course, but 
I know that I'd be worried about it.

-Cody Forbes
http://www.5000tq.com
'87 5ktq - Fast.
'87 5ktq QLCC'd plus some
'86 5ktqCD
'86 5k
'86 5k

Grant Lenahan wrote:
> Here's the scoop.  There's no magic - just 3 differentials and
> depending on the year, ABS. All of those like zero rotational
> differential, but can tolerate some, generally up to about 0.5% to
> 1%.  Keep in mind that rotational differential exists whenever you
> turn.
>
> The advice from audi is to replace in pairs.  But if one tire shows
> little wear, you can replace one.  It must be identical.
>
> You can run different front and rear tires/brands/etc/ The usual
> impact on under/oversteer apply. the laws of physics have nto been
> repealed.
>
> Grant
> On Dec 27, 2007, at 2:23 AM, Rocky Mullin wrote:
>
>>
>> i'm not so sure about that.  but it's your car!
>>
>> On Dec 26, 2007, at 10:51 PM, Sean Reifschneider wrote:
>>
>>> quattros do not need to have all 4 tires replaced at the same time.
>>> However, as I plan to switch to new tires, I do expect to replace
>>> all 4.
>>
>> _______________________________________________
>> quattro mailing list
>> quattro at audifans.com
>> http://www.audifans.com/mailman/listinfo/quattro
>> ---
>> Watch this space for ads :)
>
> _______________________________________________
> quattro mailing list
> quattro at audifans.com
> http://www.audifans.com/mailman/listinfo/quattro
> ---
> Watch this space for ads :)