Do I really need to replace all 4 tires at one time? - AudiWorld Forums

Go Back  AudiWorld Forums > Audi Models > Audi A6 / S6 / RS 6 > A6 / S6 (C5 Platform) Discussion
Reload this Page > Do I really need to replace all 4 tires at one time?
Notices
A6 / S6 (C5 Platform) Discussion Discussion forum for the C5 Audi A6 and S6 produced from 1998-2004
Sponsored by:
Sponsored by:

Do I really need to replace all 4 tires at one time?

Reply

 
 
Old 02-07-2011, 08:27 AM
  #1
AudiWorld Member
Thread Starter
 
Join Date: Nov 2001
Posts: 154
Default Do I really need to replace all 4 tires at one time?

I blew out one of my Nokian WR snow tires in a pothole. Problem is they don't make them anymore. I keep seeing you need to replace all four tires when you have all wheel drive. I believe just the front two may be OK. Here is my reasoning: While having different tires/wear levels side to side might present some issues given the nature of the quattro system, front vs back should not, precisely because of the vaunted Torsen system, which mechanically adjusts continuously for difference in traction, etc. Am I crazy or will I ruin the transmission if I put Nokian WR-G2's on the front?

Any opinions?
BillyP is offline  
Reply With Quote
Old 02-07-2011, 08:52 AM
  #2
AudiWorld Senior Member
 
Join Date: Aug 2009
Posts: 937
Default

Originally Posted by BillyP View Post
I blew out one of my Nokian WR snow tires in a pothole. Problem is they don't make them anymore. I keep seeing you need to replace all four tires when you have all wheel drive. I believe just the front two may be OK. Here is my reasoning: While having different tires/wear levels side to side might present some issues given the nature of the quattro system, front vs back should not, precisely because of the vaunted Torsen system, which mechanically adjusts continuously for difference in traction, etc. Am I crazy or will I ruin the transmission if I put Nokian WR-G2's on the front?

Any opinions?
Having driven with different sized tires in the past I would say no, a minute difference due to new thread will not affect the system.
thejulex is offline  
Reply With Quote
Old 02-07-2011, 09:41 AM
  #3
AudiWorld Member
 
Join Date: Mar 2001
Posts: 166
Default

Depending on how worn the opposite side is, you will probably be OK with two, at the most. Put both new ones on the same "axle", of course. If the tire 'on the other side' still has a lot of tread. maybe you're OK with just the one new.

BUT....

I would be a little cautious about running tires with two different tread patterns on the same "axle" (front or rear), since their traction performance might be different enough give you handling problems.

Last edited by RMsALFA; 02-07-2011 at 09:43 AM.
RMsALFA is offline  
Reply With Quote
Old 02-07-2011, 10:24 AM
  #4
Audiworld Junior Member
 
Join Date: Dec 2009
Posts: 37
Default $.02

I used to have a Subaru Legacy Outback Wagon with manual transmission and awd. It had a torsen center diff, similar to the Audi design. This was a hotly discussed matter on the Subaru boards. People who ran different sized tires front and rear pointed to a condition known as "torque binding" where the car would buck and jump while going around tight corners, esp in parking lots, etc. The theory was that constant work by the center differential would cause stress and overheating, which in turn led to torque binding.

There were also those who had run 200k miles, never paid attention to matching tires, and never had a probleem.

I never had the torque binding condition with my Subaru, but I always ran tires that matched. When I bought an Audi, I looked into the mfr recomendation for tire size, and Audi is more liberal when allowing a different sized tire than Subaru. Maybe Audi's system is more forgiving?

Be sure to explore all options. Sometimes you can find a discontinued tire online, tirerack.com etc. Be sure the tire is the same size, and if you are really worried, you can have a new tire shaved to match the existing.

Good luck.
John
towertro11 is offline  
Reply With Quote
Old 02-07-2011, 10:27 AM
  #5
AudiWorld Super User
 
Join Date: Mar 2003
Posts: 5,989
Default

I think two are fine. But here are the issues:

1) you need - both front to back and side to side - similar (not exact, close) rolling circumferences or else there will be constant motion in the diff. It matters not if its open or Torsen - motion is motion.

2) Similarly, both ABS and ESP (stability) operate based on relative rotational speed of the various hubs/axles. If the rolling circumferences are different enough, ABS or ESP could be confused.

3) On any car, FWD, RWD or AWD, if you have worn tires at one end and good at the other, you will either make it understeer more or oversteer more. Typically, people say "put the good ones on the front because they steerr". True. but that also means the rear end can snap out mroe easily - and most people panic when that happens. You choose.

Yes, i have even replaced ONE tire on a quattro and all was fine. The others were only worn about 3/32"

G
Just Me is offline  
Reply With Quote
Old 02-07-2011, 10:46 AM
  #6
AudiWorld Member
 
spoon2000's Avatar
 
Join Date: Dec 2003
Location: Metro DC
Posts: 549
Default

Also check on eBay to see what's available. You'd be amazed at the odd-ball tires and stuff that people want to sell.
spoon2000 is offline  
Reply With Quote
Old 02-07-2011, 01:09 PM
  #7
AudiWorld Senior Member
 
Join Date: Aug 2009
Posts: 937
Default

Originally Posted by spoon2000 View Post
Also check on eBay to see what's available. You'd be amazed at the odd-ball tires and stuff that people want to sell.
Very good point here. Also check your local used tires places. They usually have thousands of misc tires lying around, you might just find the right tire for yourself.
thejulex is offline  
Reply With Quote
Old 02-07-2011, 02:03 PM
  #8
AudiWorld Super User
 
Join Date: May 2009
Posts: 2,467
Default

Originally Posted by thejulex View Post
Very good point here. Also check your local used tires places. They usually have thousands of misc tires lying around, you might just find the right tire for yourself.
thats what i did to pass the time till i needed 4 new tires
2.7Lturbo is offline  
Reply With Quote
Old 02-07-2011, 04:01 PM
  #9
AudiWorld Super User
 
Join Date: Mar 2003
Posts: 5,989
Default

tire size doesn't matter one little bit.

Its the difference between tires that matters.

I run all 4 tires + 2.8%, which is a lot. But the sensors and the differentials don't know the difference. All they know is how fast the axle's rotate.

G
Just Me is offline  
Reply With Quote
Old 02-08-2011, 05:50 AM
  #10
AudiWorld Member
Thread Starter
 
Join Date: Nov 2001
Posts: 154
Default To be clear - not changing tire size just tire model

Originally Posted by Just Me View Post
tire size doesn't matter one little bit.

Its the difference between tires that matters.

I run all 4 tires + 2.8%, which is a lot. But the sensors and the differentials don't know the difference. All they know is how fast the axle's rotate.

G
Still going with 235/45-17's just going with the latest generation Nokian's since the ones I have are not made anymore
BillyP is offline  
Reply With Quote
 
 
 

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
N'Syncro
Parts For Sale
19
08-30-2017 07:16 AM
Boosted01tt
1.8T Discussion
5
01-03-2017 05:55 PM
elem
A6 / S6 (C5 Platform) Discussion
2
09-02-2015 02:20 AM
ECS Tuning-Audi
A4 (B7 Platform) Discussion
0
09-01-2015 09:16 AM
ECS Tuning-Audi
Audi A5 / S5 / RS5 Coupe & Cabrio (B8)
0
09-01-2015 08:27 AM


Thread Tools
Search this Thread
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 10:49 AM.


 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: