Winter time tire pressure

I keep the same pressure winter or summer. No problem with that.

 

Here is a link for a TSB from Toyota on how to set cold weather tire pressure compensation and adjustment.

http://www.scribd.com/doc/23980952/TSB-0345-08

 

Thats interesting. So Toyota's target tire pressure is 31.9 psi! Alot of funny math in this TSB I think only has to do with if your checking tire pressure in the heated garage in winter.

 

Caulk test is for every day driving. If you're going dropping your tire pressure for off-roading or winter driving, you're intentionally running lower than normal pressure in your tire and would (and should) fail the chaulk test.

 

I agree with you, but may I add something:

On roads covered by snow, even 1ft or 2 ft, it's better to not float, handling is poor and you won't move forward as easily as a narrow and inflated tires.

Narrow and inflated tires are better than large tires in snow, because they'll act like knives, they will go through snow to find the hard surface, the aspalt, to move on. That's why small cars seems to go forward easily, easier than 2WD trucks, because they have small and narrower tires, even they're low quality winter tires (FWD helps too).

Sand, like driving on beaches, is another story, you don't have a hard surface below, so the only option is to have large tires and flatten them out. However, if you do offroading on snow, that's another story... In this case, get a snowmobile!

So, my tires are inflated to 35psi all seasons and winter tires are a little narrower (Blizzak DM-V1 245/75/16) than summer tires (Michelin M/S LTX 265/70/16).