Where in the world are you?
The normally accepted maximum wheel/tire diameter that will fit any Touareg is 31.5 inches. One or two have pushed the boundary a little further and that's when they may get rubbing. [The standard factory fitted wheel/tire overall diameter for all Touaregs is 29 inches give or take a fraction.]
The downside of oversize tires is slower acceleration and poorer fuel consumption, but the speedo will be more accurate!
Do you have air suspension?
Take the time to read this thread thoroughly ASAP. You will learn a lot.
A key concern on any 2.5 Tdi [and the V10] with no DPF fitted is using EXACTLY the CORRECT engine oil to VW 505.01 or VW 506.01 spec.
Nothing else will do if you want to avoid expensive premature camshaft lobe wear.
Even VW dealers can get this wrong!
Did you get a handbook/manual with the car? If not, pick one up on e-bay and read it!
Hey. Thanks for your reply and sorry for the late post(everyone). I appreciate a the information you have given me, and I even discovered some new things I did not know about from your link, very useful to any touareg owner!
So in theory, if any Touareg model supports up to 31.5 inches, I was looking at the Duratracs, size of 265/70 R16 or 245/75 R16. The reason of why I'm going R16 is because these are currently in stock at my local dealer, and any R17 is currently out of stock. And any R18 is way out of the question here.
Looking at the official tire sticker on my driver door, it would seem the Touareg does take R16, with a minimum of 235/70 R16, 105H, 7Jx16. And official specs state that either Duratrac tire is within diameter limits, being around 30.5-30.6 out of 31.5. So in theory, they would fit just fine.
As for the engine oil, yes I believe I got the right one. Ever since I got the car I have been using Castrol Magnatec Edge 5W-40, and it's been working lovely. I do have air suspension, yes, and I have the car manual.
Correct me if i'm wrong but while i was browsing these forums i have encountered few situations where some people couldn't fit R16 rims on the car due to something related to brake discs being of a certain dimension. Although, this shouldn't be the case here right? To be honest, I can't recall people using lower than R17, and I do wonder.