[T3] Tire inflation pressures

[Daniel K. Du Vall]

Your Jetta door inflation label shows 35?
Interesting our 04 Golf TDI shows 32 front and 40 rear. I always found
it interesting on these pressures especially the 32 for the front. I
generally run 35 in the front on the Golf and 40 in the rear as trying
to get 32 is hard to read on my tire gauges. SO your recommending 20 and
30 for the type 3 is there a label on the car that shows this or is it
just from your experience, 20 in the front seems really low. I think
last I check I am running 35 and 30. Will try the recommendation you
gave to see how it drives. I am always up for more driver experience
like I have always gotten from VW.

P.S.
I have always readjusted my tire pressures after going to the chain tire
shops as they seem to fill everything at 35psi even my 1999 Chevy
Extended cab 4X4 not even close with that pressure which varies on what
it is being used for at different times. Off road, towing, or hulling in
the bed. 

Daniel Du Vall
http://1peter4-10.org
http://volkswageninsanity.us

-----Original Message-----
From: type3-vwtype3.org-bounces at lists.vwtype3.org
[mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Jim
Adney
Sent: Friday, July 15, 2011 8:05 AM
To: type3 at vwtype3.org
Subject: [T3] Tire inflation pressures

A few years ago, a tire shop I was at mentioned that they had added a 
few extra psi to my new tires. I didn't understand why until they 
mentioned that the pressure would drop once I took the car outside. 
It was winter and the temp outside was well below freezing.

I had never thought about the difference between tire pressure as 
measured on a warm car in the shop and the tire pressure as it exists 
outside. So this morning the topic came up again, after the local VW 
dealership overinflated my Jetta tires.

This time I did the numbers. On a cold winter day, a tire that's 
inflated to 35 psi (correct Jetta pressure) in the shop will drop 4.6 
psi when it is taken outside where it is zero F.

A tire taken from an airconditioned shop into a hot summer day will 
rise a much smaller amount, simply because there's no way to get an 
equal amount of temp rise outside. (That would be 140 F!)

Our Type 3 tires would see smaller pressure changes because they 
start with less pressure. Remember that for best results you should 
use ~20 psi front and ~30 psi rear. Squarebacks can use up to 36 in 
the rear if fully loaded.

Type 3s with wider than stock tires will use LESS pressure.

-- 
*******************************
Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
*******************************

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