tire pressure...

[thirtythree]

I don't really know anything about cars but my tires looked a little low so I checked the pressure and they're all at 25 psi. the tires say 44 psi so... is it possible that the cold would make that big a difference? should I fill them? to what pressure? thanks.

 

[Nohr]

Go by what your car's manual says.

 

[sillymofo]

Whatever is listed on your tire denotes MAX pressure, given that the air will heat up as you travel, most places will fill your tires up to 35 psi. I fill mine up to 40.

 

[TechnoKid]

Your tires will go down 1 psi for every 10 degree drop in temperature outside. Also, tires sometimes tend to lose air over time. A psi drop of 5 can significantly increase the risk of tire blowout and will decrease your gas milage.

25psi is a bit low. Pump it up to 30-35.

 

[thirtythree]

thanks. guess I'll fill 'em up to 35 unless the manual (if it exists) tells me otherwise.

 

[Quixfire]

You can also check the door jams and the glove box for tire pressure recommendation.

 

[CraigRT]

I recommend pressure in the low 30's 90% of the time.

 

[0roo0roo]

generally u never go that high. car manual/caar door/trunk/door post should say ~30 somethin. unless its severely low like in ur case, u can't tell by lookin. 25 is way low for most cars. u should check atleast once a month. tire blowout/extra wear possible.

 

[StageLeft]

I go by recommended in the car, from either the manual, door jam, or interior compartment, depending on the car.

 

[NutBucket]

40psi!!! Jeez. I hope those are like bike tires or something. Most cars are about 30-32 psi.

 

[JC]

Check the owner's manual, but failing that, 32-35 is a good rule of thumb.

 

[TheNinja]

My car tires says Max 44 psi as well. I think high quality, high performance tires have a higher PSI. I usuallyfill mine around 40. Make sure you have riding around on the tire for a while when checking/filling. The 44 PSI is max when warm, so you should always check and fill your tires when they are warmed up.

 

[Cat13]

My Rodeo recommends 26 psi.

 

[TechnoKid]

Originally posted by: Staley8
My car tires says Max 44 psi as well. I think high quality, high performance tires have a higher PSI. I usuallyfill mine around 40. Make sure you have riding around on the tire for a while when checking/filling. The 44 PSI is max when warm, so you should always check and fill your tires when they are warmed up.

This is contrary to all the automitive articles, owners manuals, and tire manufacurer's manuals that I've read that speicifically state to check the pressure when the tire is cold. Trying to fill and adjust the tires when warm will result in erradic air pressure when they are cold. Generally, warm tires will have about 4-5psi more "psi" then when tire is cold.