What a great idea! I need a few. I recently bought some valve caps with
built-in pressure indicators but one of them already blew off the valve stem
for some reason. So far the other three are holding but I am beginning to
wonder about how good it is long-term to have the valve pin always depressed
(so that the caps can read the tire pressure). I guess we'll see. At least
when the one valve cap blew off, it failed "safe" and didn't deflate the
Tony Hwang posted
<New cars have tire pressure monitor valves. Don't need to check
<pressure unless monitor senses it. Put in Nitrogen which is more stable.
Baloney, stable isn't why you use nitrogen.. The nitrogen molecules are larger than the oxygen molecules, and don't leak out/seep through the rubber as quickly, so the pressure drop due to leakage is less.
On 7/19/2014 4:59 PM, firstname.lastname@example.org wrote:
How much does it really matter? I had new tires put on my car last
November. Air pressure is still OK. Previous tires I added air one
time that I can recall.
Nitrogen was initially used for aircraft tires subjected to radical
temperature changes and high speed landings. Later, race cars started.
Personally, I could not be bothered.
The summer temp is as high as 30C and in winter it drops as low as -35C,
fluctuation of tire pressure is quite noticeable between season.
Local Costco tire shops use only Nitrogen, some shops charge extra for
that. Pretty soon I need a set of new summer tires, probably go for
Continental Contact LX2 with Nitrogen..
One advantage to nitrogen is that it's dry. When I used a compressor to
fill an air tank to work on farm tires, water would accumulate in the
tank. The partial pressure of moisture in a tire could vary a lot with
temperature. A race car could develop too much pressure in its hot
tires, and a plane could touch down with too little in its cold tires.
All season tires are a compromize - even Nokians.
I use ice and snow tires for the winter, and high performance touring
tires for the summer except, at least for now, my wife's car. She does
not need to go anywhere if the roads are bad - I can take her where
she needs to go with the truck, So she's got TigerPaw Touring tires on
the Taurus. (car goes about 5000km a year if we don't take a major
summer road trip)
Right, winter tires here is Nokian, Toyo, Michelin X Ice II on separate
steel rims. I change tires myself since I have needed tools at home
garage. Compressor, all the air tools and 3.5 ton floor jack, etc. Every
vehicles in my family are AWD, still winter tires do help in snow
and on ice.
My car came with OEM pressure monitoring system, son's being
high performance type it is dressed up. Wife's, just AWD jalopy
she loves, won't have any thing else. I even tried to bribe her
with Bimmer X3, LOL! She used to drive around when kids were young
a 1 ton camoerized/tow van. Our car buying days are over. At 75, we have
to take physical exam to renew license, and then every two years
there after. When we're not allowed to drive, I guess we have to move
into down town condo or move out to cabin. Or time to say bye to mother
earth for another journey, LOL!
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