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Old 11-27-2010, 10:35 AM   #1
Tomlins_Afro
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Tire Pressures

What tire pressures do you guys use for front and back on long road trips? (500+ miles) In cold weather would it make more sense to use a pound or 2 less than max because the tires heat up and the air expands?
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Old 11-27-2010, 10:57 AM   #2
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That's probably not a good question to ask because many people have different preferences. You can't go wrong if you stick with the recommended pressures on the decal when the tires are COLD. Never adjust tire pressures just because it's cold or hot outside. Fill them with the pressure on the decal when cold. The tires will take care of themselves.

Tires will heat up regardless of the outside temperature when you drive. Probably about 3 PSI. Fronts heat up more unless you're driving/cruising in a straight line. And if the sun is always on one side of the car they heat up more. It's not possible to keep them where they "should" be. You're not supposed to compensate. If you're racing on an oval or autocross you do, but that's another story.

Personally, I lower them for a better ride.

Last edited by The Fed; 11-27-2010 at 05:10 PM.
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Old 11-27-2010, 11:02 AM   #3
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in cold weather you need more pressure 10˚c less = 0.1bar more

also when its cold i dont think the tires really heat up ??
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Old 11-27-2010, 12:30 PM   #4
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Difference tires have different temp ratings A,B,C with respect in the tires ability to dissipate heat
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Old 11-27-2010, 01:11 PM   #5
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Over inflation is not much of a risk. Tires can withstand significant pressure without failing. they are usually hydro tested well over 100psi. the problem is that when you over inflate the tire rounds out, gets very stiff and you get poor tire wear. I would run 35-38psi measured when cold.
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Old 11-27-2010, 01:21 PM   #6
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I run anywhere from 32 to 35 all around the whole car, and I travel about 700 miles a week for work
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Old 11-28-2010, 12:22 PM   #7
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If you're still on the original tires, go with the door jamb recommended pressure.
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Old 11-28-2010, 12:41 PM   #8
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agreed best start off pressures
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Old 11-28-2010, 01:13 PM   #9
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I run 40psi for longer trips (max 600 miles)
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Old 11-28-2010, 05:54 PM   #10
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Just run the pressures that are on that sticker in your door jamb.
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Old 11-29-2010, 01:31 AM   #11
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I run about ~36-38 psi on all 4 wheels (thats measured cold), recommended according to vw on my doorjam is 35.
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Old 11-29-2010, 02:17 AM   #12
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for daily driving i run 36 because the tires aren't heating up enough in stop in go traffic like city driving. for longer trips, like turnpike, i like to run a 34 because they the tire will heat up and expand the air inside, maximum grip occurs at 36psi, so when track days or anything like that 32psi giving me 4psi to expand but each tire expands differently some it could expand only 2psi under heat so you would want to run a 34 to achieve 36
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Old 11-29-2010, 02:44 AM   #13
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Quote:
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Just run the pressures that are on that sticker in your door jamb.
Quote:
Originally Posted by NewToVW View Post
If you're still on the original tires, go with the door jamb recommended pressure.
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Old 11-29-2010, 09:25 PM   #14
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Another thing... I keep getting a low tire pressure warning every time I start the car and a warning light stays on all the time alerting me to the "problem." I put problem in "" because I have checked and rechecked the tires numerous times in numerous conditions and the pressure is never more than 1 lb less than the recommended setting on the door. Do I have to bring it in to the dealership to clear the "fault?" (I don't have access to Vag-Com)
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Old 11-29-2010, 09:37 PM   #15
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Originally Posted by Tomlins_Afro View Post
Another thing... I keep getting a low tire pressure warning every time I start the car and a warning light stays on all the time alerting me to the "problem." I put problem in "" because I have checked and rechecked the tires numerous times in numerous conditions and the pressure is never more than 1 lb less than the recommended setting on the door. Do I have to bring it in to the dealership to clear the "fault?" (I don't have access to Vag-Com)
Pump the tires up to 45 or 50 and see if the light goes out. If so, bleed them back down to 38. They not that sensitive, they can't read within a few pounds.

If that doesn't work you may need a new sensor(s) due to bad batteries.

No fault to clear. You need your own VCDS to disable or reset tripping pressures, dealer won't help you.
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Old 11-29-2010, 11:52 PM   #16
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Try 35-38 psi. The tpms should def turn off at that pressure. For cold weather, Im at 33ish psi. Works great for me in the NY cold
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Old 11-30-2010, 12:14 AM   #17
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Check your spare. If it's a full-size, anyway.
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Old 11-30-2010, 05:45 PM   #18
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I don't think the spare will trip the sensors unless you recently had it on the car. Mine was low and it didn't trip.
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Old 11-30-2010, 06:11 PM   #19
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Just run the pressures that are on that sticker in your door jamb.
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Old 12-01-2010, 06:02 PM   #20
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my mk6 tire pressure recommendation is 38 psi. I think this is too too stiff and is done for newer gas mileage standards. Older GTIs with the saem Huff wheels were running 35 psi.

I run my mk6 at 36 psi cold pressure. Nice compromise !
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Old 12-01-2010, 06:06 PM   #21
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also when its cold i dont think the tires really heat up ??
yes they do, it's called friction.
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