Last post on Nov 29, 2013 at 9:18 AM
You are in the Maintenance & Repair
What is this discussion about?
Tires, Wheels, Steering
Edmund's Feature Article: Tire Safety: Don't Ignore the Rubber on the Road
For dedicated winter tires, also have a look at the Snow/ice winter tires discussion topic.
Nov 19, 2013 (8:22 am)
I can't see anything out of the ordinary on those photos.
Nov 20, 2013 (6:21 am)
Same here. I don't see anything either - and it may be why General took the harsh stance.
Nov 28, 2013 (3:17 pm)
Psi is psi, right?
My garage is unheated so if I check my tire pressure "cold", I'm done. Right?
So why does Nokian say:
"Remember that temperature affects pressures: in cold weather, the pressure needs to be higher than in higher temperatures."
Seems like something got lost in translation. Or do they simply mean that your tires won't warm up as fast as they would in the summer and you should add some "extra" air. Or does this statement somehow relate to M+S tires and not ones like my WR-G2s?
#7443 of 7449 Re: winter tire pressure [Stever@Edmunds]
Nov 28, 2013 (5:58 pm)
I think what they probably meant was that tire pressure naturally falls in lower temperatures and you may need to add air to the tires. Not to a higher PSI, but to get them to the PSI specified on the placard on the car, as a result of the temperature drop.
#7444 of 7449 Re: winter tire pressure [Stever@Edmunds]
Nov 28, 2013 (6:28 pm)
> the pressure needs to be higher than in higher temperatures."
What they are saying is because you are measuring your temperature in a garage environment that in winter is warmer than the ambient outdoor temperature, the tires would have to be at 33 lbs in winter because your garage is 30 degrees or so warmer than the outdoor temperature. In contrast, in summer your garage might be even cooler than outdoors, so putting your tires at 30 might end up with tires at 32 with the increase in outdoor temperature. So if your garage is heated above the winter outside temperature, add extra pounds at about 1 lb for each 10 deg. F.
The best thing to do is measure your pressures outdoors at the nominal temperature for that season.
#7445 of 7449 Re: winter tire pressure [imidazol97]
by Stever@Edmunds HOST
Nov 29, 2013 (7:13 am)
I guess the Finns all have attached garages with conditioned air. Maybe they even do like Buffalo and put in floor drains and hot running water.
Just checked my three thermometers and they all say 18°, including the one in my detached garage.
In any event holding my pencil tire gauge with my gloves is about impossible and it's too durn cold to check them barehanded so the heck with it.
(I took a hard fall on the icy beach yesterday so I guess I do need some studs).
#7446 of 7449 Re: winter tire pressure [Stever@Edmunds]
Nov 29, 2013 (7:41 am)
..."Psi is psi, right?
My garage is unheated so if I check my tire pressure "cold", I'm done. Right? ""...
I guess I am adding to the TMI, according to one TPMS and checks/verifications with hand held dial TP gauges. Part of the variance is (differences in PSI of measuring devices) asking the "correct" time of say 5 watches.
No ! No ! No ! ???? In your example of fill 18 degrees F and IF you operate in 30 degrees F you are least 1# off.
The answers are really of layers. Here are a few. Ambient temperatures have their own effects app +/- 1# per 10 degrees F. Sun on one side/ none on the other. Leakage over time is app - 1# per month. Operating temperatures between +/- 4 # to 8#'s
#7447 of 7449 Re: winter tire pressure [ruking1]
by Stever@Edmunds HOST
Nov 29, 2013 (8:16 am)
It's currently 18°F. Ambient, in the garage, driving down the road.
Really, I should lower the psi because of the wind chill effect on the tires.
#7448 of 7449 Re: winter tire pressure [imidazol97]
Nov 29, 2013 (8:16 am)
".....The best thing to do is measure your pressures outdoors at the nominal temperature for that season....."
Or set the pressure at one temperature such that they are correct for some other temperature - the ones that would be experienced during a particular season.
For example, I could set the pressure 3 psi high in September when it's 50 degrees and the tire would be properly inflated when it is 20 degree.
BTW, tire pressures aren't all that critical. A few psi (1 or 2) is not a make of break sort of thing. Don't try to over complicate this.
#7449 of 7449 Re: winter tire pressure [capriracer]
Nov 29, 2013 (9:18 am)
>BTW, tire pressures aren't all that critical. A few psi (1 or 2) is not a make of break sort of thing. Don't try to over complicate this.
Are you saying I'm over-complicating this?
I was responding to a question.
Actually, in cold winter, <40 degrees F here, I like to keep my pressure at a pound higher than I would in summer when I'm going on a higher speed longer trip. In summer, the tires heat up more and compensate partly by raising the pressures. In the winter with a cold (for here) ambient temperature, the tires run colder and don't add pressure due to the tire carcass's not heating up as much due to the heat's being taken away by the cold air, e.g. 20 deg. F..