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Discussion Starter · #1 ·
When the tire shop said the nail was almost too close to the edge to repair. Said I would have had to buy all 4 tires since it's AWD and they don't shave tread down.

So, the question I have is: If one tire goes, all four need to be replaced?
 

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Depends how worn they are. Big diameter changes from wear or different tire brands can freak out the traction control system, or cause other tire wear.

If the tires still have half life, I would just put a new tire on (same brand/model).
 

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Discussion Starter · #3 ·
This particular shop was telling me a story where they changed 2 tires on an Audi Quattro. Three months later, the lady's transmission blew up and she sued and won. Now they won't even mess with AWD cars unless they replace all 4 tires.
 

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Agree. Find another shop. I seem to get a nail in a tire once or twice yearly. I also get tire insurance...about $25 per tire. Worth it to me since in it includes the cost of plugging a tire (if nail is in center area) or replacing the tire (if nail is outside of center area). If the tire has a lot of miles, the replacement is pro-rated.
 

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How many more times do I have to type:

No more than 2mm tread depth difference on the same axle.

No more than 3mm tread depth difference between front and rear axles.

And ALL four tyres/tires must be the same size, same make, same model, same tread pattern.
 

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shaving unfortunately is ghost whispers in Sydney. Only one shop and they were racers and could not accommodate large wheel sizes

bloody frustrating that old tech is out the door !!!!





X2. Shaving tires is not voodoo science. It's a well known practice in the industry.

A good tire shop should be able to do it, but again, probably not required for only 2,000 miles of wear.
 

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Noob

youve done enough. Let me shout you a pot of tea !!!!

Would you like a bicky and a throw over your legs :evil_laugh::evil_laugh::evil_laugh:


Sorry couldnt help it. Maybe we will meet up for the grumpy old man Christmas special





How many more times do I have to type:

No more than 2mm tread depth difference on the same axle.

No more than 3mm tread depth difference between front and rear axles.

And ALL four tyres/tires must be the same size, same make, same model, same tread pattern.
 

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Discussion Starter · #10 ·
How many more times do I have to type:

No more than 2mm tread depth difference on the same axle.

No more than 3mm tread depth difference between front and rear axles.

And ALL four tyres/tires must be the same size, same make, same model, same tread pattern.
Haven't looked in the manual yet regarding this; I assume it states this?
 

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Discussion Starter · #12 ·
Well on that note, I'm trying to recall the addendum that I received to my owner's manual regarding tire rotations. I want to say that it said not to rotate them at all. Anybody else have the addendum?
 

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I'm usually pretty skeptical about things like this. However, in THIS case I wold opt for keeping the tires within the spec nooby quotes. Keep in mind Nooby has been around here for a long time and has helped out a lot of people, myself included. The cost of being wrong is a whole lot higher than the benefit to being right. If a mis-sized tire places undue wear on some part of the driveline (and it make some sense that it could), the cost of the cheapest part is really high. However in this case getting a tire shaved a little bit sounds like it would be pretty cheap.

I do wonder about how much different the new tire is at that low of a mileage. May be less than the tolerance. I also wonder about how much an over or under inflated tire could affect the effective circumference of the tire as it rolls along. So, its not like I don't have questions about the idea of keeping the tires within a certain spec, its just that I don't like to make hefty bets when I don't have solid facts to back me up.
 

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Weird thing about tires. The rolling diameter stays fairly constant over the acceptable pressure range.

Under inflated the tread acts somewhat like a tractor tread and even though the axle center height is lower then the nominal radius, you still get the same effective revs per mile.
The tread only expands upon significant over-inflation.

The typical for 4WD/AWD systems is 3% effective rolling diameter and that is often as much as 1/2 the tread on a tire.
No harm in being conservative but almost no way 2K miles would exceed a fraction of 1%
 

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Well on that note, I'm trying to recall the addendum that I received to my owner's manual regarding tire rotations. I want to say that it said not to rotate them at all. Anybody else have the addendum?
No addendum..The tire rotation schedule should be at 10K miles, every oil change. That's the way it's laid out in the maintenance schedule for year 2013. I have been doing this and I have even tire wear.

Funny this thread is about getting nailed. Yesterday, I noticed a small screw in the outside tread of my rear tire, near the sidewall. It must be short because I haven't seen a drop in tire pressure (checked 4 times since yesterday). I'm going to unscrew it at home. If it leaks, I'll go straight to the Winter set of wheels/tires, and getting new all-seasons in the Spring was my plan anyway (37K+ miles on the OE Pirelli Scorpion Verde tires, they are nearly done anyway).

I didn't want to install the Winter rubber until there's a need. The temps have been warm for this time of year.
 

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If we assume that the life of the tyre/tire is around 35,000Km and the new useable tread depth 8mm then a 2mm difference (for same axle) in tread depth would equate to 8,750Km or 13,000Km front to back (provided both tyres on each axle do not exceed the 2mm). I would assume that the 3mm difference would apply to smallest and largest between back & front axles.
So the tyre size issue has a fair amount of latitude within which they can be combined. Not as scary as it sounds at first.
 

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LOL- change your dealer...

You should have "comparable" diameters on each axle- but what we are talking about here will be less than having a little bit different tire pressure or an unbalanced load (weighs your wife the same as you? :))

or tell him you need it as spare tire for the trunk...

br
Mark
 
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