Actually I am finding the oem recommendation 33/38 psi + 3 psi per highway operation recommendation or 36/41 psi.

 

I do 36/41 and I have nitrogen in my tires. I’ve decided to try nitrogen per my former Service Advisor’s recommendation who is now Service Department Manager at the very large dealership (not the VW dealership). The only obvious benefit of nitrogen is that one may forget about tire pressure adjustments – almost entirely - it fluctuates very little with temperature differences. I’ve paid $20 for 2 years nitrogen service – but I am not checking tire pressure every week anymore.

 

Rdub is right, do what is comfortable for you.

 

Nitrogen won't migrate out of the tire as fast as compressed air, but you still need to check monthly. Top off with N2 only or you lose the benefits. A 95% or better fill is what you need.

 

I think what is interesting with our real world and real time TP sensors, are a few things can be done with the data (overload/TMI, etc.).

Since I have two recent VW products (2003/2009) TDI's (230,000 miles), albeit no TP sensors: I was struck with VW's stance/view on the T's product coming "out of the closet" finally about the TP issue. The first measures are of the TWO oem recommendations:
1. 33/38 PSI
2. 36/41 PSI or 3 psi over
(#1 and its first oem recommendation. )

It really used to be a procedure to check the actual TP. Now it can be done from a computer screen: cold, hot, operating temperatures, TP with change in ambient temperatures, sun on/off, etc, etc. One goal would be optimization, @...a bunch of different levels.

For example I have one (of many) longest tire life (consistent with operating conditions). In my case I find that 3 psi SEEMS to give longest tire tread life, aka lowest wear per 1/32nd in : specifically 14,500+ miles per.

 

perfectly clear, rdub!

 

Wasn't it simpler when it was just fill cold to oem recommendations?

 

I have an aftermarket system that reads all the time. It's interesting to watch the pressure come up with the temp. On the interstate they run 30 degrees above ambient.

 

seems like getting consensus around +3psi from recommended, or what ever I am comfortable with

 

+ 3 harsher ride for 20 inch wheels?

Seems to me running them 1 or 2 under would be better for the ride. I think the 19 inch feel a bit rough and am thinking about going in the other direction.

 

I can't figure out the correct pressure to put in my new snow tires.

The placard on my 2010 TDI with 20" wheels says 38 front/48 back. It doesn't say what is recommended for other sizes.

I bought 18" wheels last summer. What is the recommended pressure for 18" wheels? My General AT2 have a max. inflation of 51lbs

I just bought another set of 17" wheels and put snow tires on them. What is the recommended pressure for 17" wheels. My Bridgestone Blizzak Snows have 42lb max inflation.

Can I change the TPMS pressure values with my Vagcom?

My digital tire pressure tester always register 2-3lbs higher then my TPMS. Which do you trust?

 

I can't figure out the correct pressure to put in my new snow tires.

The placard on my 2010 TDI with 20" wheels says 38 front/48 back. It doesn't say what is recommended for other sizes.

I bought 18" wheels last summer. What is the recommended pressure for 18" wheels? My General AT2 have a max. inflation of 51lbs

I just bought another set of 17" wheels and put snow tires on them. What is the recommended pressure for 17" wheels. My Bridgestone Blizzak Snows have 42lb max inflation.

Can I change the TPMS pressure values with my Vagcom?

My digital tire pressure tester always register 2-3lbs higher then my TPMS. Which do you trust?

17s 36F/38R

 

265/60 R18..... psi???

i have 265/60 R18 psi on my tires .... does anyone know what pressure should i keep them on ... please help

 

Confucius say,

over 120 mph, allrays ovelinfrate by thlee pounds. On sand, tempolaliry defrate by fifty pelcent. Low plofile better high speed and smooth load, mole plessure. High plofile, bettel off-load or clappy load, ress plessure.

 

I expect to be jumped on for this but I have a slightly different approach. I am always a little skeptical of the OEM tyre placard. I pump my tires up until the sidewall deflection looks visually correct ( purely my concept of what it should be) then take it for a short drive to see how it rids and turns into corners. Then I do a final check on pressure when the tyre temps are cold. With the V6 Treg on 17 inch tyres, I have settled on running 34 psi on all wheels with my Road Tyres and 32 psi for my Mud tyres ( except when off road then anything down to 7 psi depending on surface conditions).

Unless you carry a heap of crap in he back of the car, I can't work out why VW recommend an additional 2 psi on the rear axle. If you are not carrying anything, then all this does is upsets your front to rear balance and makes the rear more unstable in hard cornering on winding roads.

Just me and my approach to tyre pressures.

Stuart....( I know the tyre placard is in kpa, but I am old and still think in psi)

 

...Unless you carry a heap of crap in he back of the car, I can't work out why VW recommends an additional 2 psi on the rear axle. If you are not carrying anything, then all this does is upset your front to rear balance and makes the rear more unstable in hard cornering on winding roads...

I do not have air suspension, but for anyone who uses their ride in many different situations, it would make transitioning from unloaded, to fully loaded, to light trailer, to extreme trailer, to bituminous, to mud, to sand, etc, very convenient.

VW has different suggested pressures for different wheel sizes, and also different pressures for different model years. I set my pressure based on the factory because I do trailer and would not want to manually inflate and deflate every time I hooked up my trailer. Plus, I do not have TPMS, so I put up with the harsher high pressure on the rear (lest I forget to re-inflate) even when I leave my boat at home.

Even when not trailering, I can see the advantage of more pressure in the rear...

Way back in 1977, I was tailing directly behind a 60s vintage Kombi on its way down an incline, approaching an underpass, when it suddently started to sway frightfully to and fro, still traveling about 35 kph (this was in Regina, Alberta, Canada). Two blokes in the front, and a third in the rear, using his outstretched arms to rock ye olde mini-bus, clueless as to the mayhem and havoc soon to ensue. After a series of ever more exaggerated lateral dives, the V-Dub became airborne, flipping onto its top, which from the force of impact squished down a full foot of English measure, and slid down the asphalt, sparks flying. After the once fire-eyed relic had skid to a halt, the three passengers emerged, rubbing their heads, undoubtedly suffering from concussions. Most amazing to me were their looks of astonishment, like they could not believe what a POS suspension they had been fooshing with.

The Treg is a rocket compared to that old Kombi.

 

OK. I found the information in my manual. Imagine that. I am still confused though. It says 39front/46rear for 17",18",19". It also says don't go over tires max inflation.

My Bridgstone Blizzaks say 42lb max. What should I do?

 

EDIT: My Blizzak's have 44psi max.

 

I run 33 and 39 on my 2013 Executive. Rides and handles great

 

Which tires did your Exec come with, Goodyear or Pirelli? Mine came with Pirellis, like you I'm also running them at the recommended 33/39 and happy with that so far. The Pirellis don't get much love here but for highway use they seem like pretty decent tires.

 

V.W. and the tire companies have a large group of engineers working the best pressures for handling and safety. Follow the placard, if your tires can't handle the recomended pressures you bought the wrong tires. Touaregs use 109 load rated tires, less than that your on your own on safety.

 

Yep, 33 and 39.

 

I just checked my tires, and I have General's (whatever those are). 255/60/17 with 105h (whatever 105 means), and max weight of 2094lbs per tire. The wall of the tire says max inflation is 51psi, which I think is really high. Sticker on the car says all sorts of things, but I believe it specifies maximum psis of 36 for the front and 44 for the back on 17 inch tires.

 

The sticker gives clear guidance on the correct pressures for you car according to loading. It is not that hard to see which is the advised pressure for your car!!

The correct load rating for the tires in 255/60/17 is 106.

The H rating is the maximum sustained speed for the tire.

The maximum pressure shown on the tire's sidewall is just that and has no relevance to the car manufacturer's recommended pressure unless the latter is greater than the former!

V is the norm for road biased tires on the Touareg.

Google tire loadings and speed ratings if you want to know more

 

Thanks, Noobytoogy. I did google and saw what you stated to be accurate.