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Discussion Starter #1
Hi all,

I have a 2014 TDI RLine with 275/45/20 Nokian WRG3 and found, when taking off my wheels off to try out some other winter tires, that my right rear tire was wearing excessively on the inside. The fronts were both showing just shy of 8 mm with mostly even wear (to the eyes) while the rears are barely showing 4-5 mm and the RR is 3-4 mm and the inside of the RR is almost dangerously worn.

I had the vehicle aligned at ~75,000 km and I'm now at 100,000 km with no known impacts accidents, mistakes or curbing of the wheels. Attached below is the alignment from 2 years ago showing all specs in green and nothing to believe the RR has a problem.

I am assuming I need another 4W alignment regardless?

How adjustable are the rear linkages on the 2014 Touareg? IS toe and camber really adjustable?
 

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How long have the tires been on the car?

New tires usually have 8 mm tread when new, maybe 1 or 2 mm more on aggressive treads such as winters or ATs.

So to see 8mm on the front and 4 on the back seems unusual.

Were they all replaced at the same time and are all 4 tires identical in size, make,model and tread pattern?

Regardless, if the 8mm is correct then you need 2 new tires (identical to the other two on the car) to get back within the 3 mm maximum permissable difference between tires on the front and rear axles to avoid transmission damage due to wind up.

Given that Touaregs normally wear their tires pretty evenly then it looks like l you need a full 4 wheel laser alignment when you fit the new tires and also you need to get all your suspension bushes checked. Something sounds out of kelter on your car.
 

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Discussion Starter #3
I am not sure about the length of time the tires have been on as I am 2nd owner. However, based on their tread depth at 73,000 km when I purchased, the tires looked near new (8-9 mm). So, I'll estimate they have been on since 65,000 km or for about 35,000 km now- that's less than half their rated treadwear rating of 80,000 km. This tracks well with the wear on the fronts.

I think in my post above I was assuming new tires had 10-11 mm but I was probably thinking in 32nd's of an inch so if new tires are in general 8 mm it makes sense. More accurately the fronts are showing 6 mm or slightly more and the rears are showing 4 mm or maybe 4.25 mm.

I took a closer look at the rears and while the RR is worst, the LR also has some feathering on the inside. Although the rear toe and camber are in spec I wonder if the combined values are just too much...I'll have the bushings checked as you noted...
 

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Suspension components wear out... even without curb hits and such...... a large pothole can have negative effects on an alignment. I would take it in for another check\alignment. Make sure the shop is competent and they actually check for worn out components.

How often do you check your tire pressures, or how closely do you monitor them? Are you running TPMS?

Also, looking at your report above, you have 3 wheels showing an inflation of ZERO PSI..... I'd start questioning the status of the shop equipment being used based on that....... perhaps try a different alignment shop this time!
 
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