Air Pressure

redhorse · 01-17-2006, 07:30 PM

Question for all you great minds to help the simple minded like me. Why is the recommended air presure on a tire listed as 44lbs. and when inflated to that presure, especially on a performance radial, the car is almost impossible to drive? My wife had her Nittos on her Solora rotated and balanced and of coarse they changed the air presure that I had them, which was about 30-32lbs. This evening she said that car was hard to drive on the interstate with the presure that was in the tires. Any clues or help?

QWKSNKE · 01-17-2006, 07:59 PM

that is MAX rating not recommended rating. Nobody should ever run a street tire at 40 psi. Its dangerous. Somebody didn't know what they were doing

Recommended tire pressure are located in your car. (on either the door jams, glovebox, etc.. Its a silver decal on most vehicles)

Italian LX · 01-17-2006, 07:59 PM

The recommended air pressure should be listed on the inside door sticker of your car. 44psi sounds more like a maximum pressure rating for the tire.

I usually run 32psi in all my street tires and when I had drag radials, I ran 24-28psi on the street.

redhorse · 01-17-2006, 09:35 PM

That is what I thought, and that is usually what I run 30-32psi. But then pray tell me why these guys, at these tire stores want to put so much air in tires?

EZ SPEED · 01-18-2006, 02:57 AM

Quote:

Originally Posted by redhorse

But then pray tell me why these guys, at these tire stores want to put so much air in tires?

Because they are Nutsac's and dont know any better

QWKSNKE · 01-18-2006, 03:48 AM

Quote:

Originally Posted by KB ZILLA

Because they are Nutsac's and dont know any better

Sendero · 01-18-2006, 07:37 AM

I run 65psi on a set of Nitto 555R's. They handled and hooked great! Don't believe me, ask Jugg.

Purple1995Pony · 01-18-2006, 09:50 AM

lower profile tires handle much better at the higher pressures on tracks and autox....not good for teh daily driving though ....especially where I live with the crappy roads

TheJeanyus · 01-18-2006, 10:23 AM

For hard cornering, higher pressures are necessary to cut down on sidewall flex. It does make them ride rougher and wear more toward the middle, though. I run about 26 - 28 psi in my front tires (Kuhmo Ecsta MX 275/40) and 25 psi in the rears (Nitto 555R 315/35).

93Cobra#2771 · 01-18-2006, 02:11 PM

Now that I think about it, I need to drop the air pressure in my nitto drags, I'm running 32psi, I believe.

I actually run max pressure in my DD truck tires. Better fuel economy that way. I picked up about 1/2 mpg doing so, believe it or not.

01-17-2006, 07:30 PM	#1
redhorse Senior Member Join Date: Jul 2005 Location: Trussville, Al Posts: 819	Air Pressure Question for all you great minds to help the simple minded like me. Why is the recommended air presure on a tire listed as 44lbs. and when inflated to that presure, especially on a performance radial, the car is almost impossible to drive? My wife had her Nittos on her Solora rotated and balanced and of coarse they changed the air presure that I had them, which was about 30-32lbs. This evening she said that car was hard to drive on the interstate with the presure that was in the tires. Any clues or help?

01-17-2006, 07:59 PM	#3
Italian LX Daddy x4 ...we're done Join Date: Dec 2004 Location: Oxford, AL Posts: 11,551	Re: Air Presure The recommended air pressure should be listed on the inside door sticker of your car. 44psi sounds more like a maximum pressure rating for the tire. I usually run 32psi in all my street tires and when I had drag radials, I ran 24-28psi on the street. __________________ -Brian '86 Mustang GT Convertible '88 Mustang LX coupe '11 Odyssey TE '21 Insight Touring

01-17-2006, 09:35 PM	#4
redhorse Senior Member Join Date: Jul 2005 Location: Trussville, Al Posts: 819	Re: Air Presure That is what I thought, and that is usually what I run 30-32psi. But then pray tell me why these guys, at these tire stores want to put so much air in tires?

01-18-2006, 07:37 AM	#7
Sendero Im gonna show her my... Join Date: Dec 2004 Location: Somewhere providing FREE tech support. Posts: 4,269	Re: Air Presure I run 65psi on a set of Nitto 555R's. They handled and hooked great! Don't believe me, ask Jugg. __________________ I heard it on the internet, so it must be true. "I believe that a person's moral compass can be determined by how he references free men the right to defend themselves." T. Nugent "An armed society is a polite society. Manners are good when one may have to back up his acts with his life." R. Heinlein "Never argue with an idiot. They drag you down to their level, then beat you with experience." -Unknown

01-18-2006, 09:50 AM	#8
Purple1995Pony Friends' Dad/Dad-in-Law Join Date: Dec 2004 Location: Taunton, MA Posts: 510	Re: Air Presure lower profile tires handle much better at the higher pressures on tracks and autox....not good for teh daily driving though ....especially where I live with the crappy roads __________________ 95 GT Vert 01 F350 SD *06 300C Hemi AWD*

01-17-2006, 07:59 PM	#2
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Re: Air Presure that is MAX rating not recommended rating. Nobody should ever run a street tire at 40 psi. Its dangerous. Somebody didn't know what they were doing Recommended tire pressure are located in your car. (on either the door jams, glovebox, etc.. Its a silver decal on most vehicles) __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

01-18-2006, 10:23 AM	#9
TheJeanyus Administrator Join Date: Dec 2004 Location: Huntsville, AL Posts: 14,774	Re: Air Presure For hard cornering, higher pressures are necessary to cut down on sidewall flex. It does make them ride rougher and wear more toward the middle, though. I run about 26 - 28 psi in my front tires (Kuhmo Ecsta MX 275/40) and 25 psi in the rears (Nitto 555R 315/35). __________________ 1998 Mustang GT Coupe - World's Slowest Racecar 2005 Toyota 4Runner SR5 V8 2013 Volkswagen Jetta Sportwagen TDI

01-18-2006, 02:11 PM	#10
93Cobra#2771 The Kocky One Join Date: Dec 2004 Location: Yeah, but those cutters won't bust any walnuts.â„¢ Posts: 1,948	Re: Air Presure Now that I think about it, I need to drop the air pressure in my nitto drags, I'm running 32psi, I believe. I actually run max pressure in my DD truck tires. Better fuel economy that way. I picked up about 1/2 mpg doing so, believe it or not. __________________ *For Sale: Reproduction Window Stickers, 87+ Mustangs, Cobras, Lightnings, and HD F150!* Richard White 93 Cobra Kocky will be back!