Tire Inflation

redhorse · 03-10-2006, 08:18 PM

Just bought a new set of tires. On the sidewall the max psi is 51 psi. What is the opinion of what pressure to run? They were set at 45 and the car felt like it was bouncing down the road, so I dropped them down to 42 and they are a lot more friendly.

Hotrod · 03-10-2006, 08:34 PM

I usually run aroud 35 in all my vehicles. We got a 96 explorer, 01 ranger, and the 93 mustang and they have roughly 33-35 pounds in each tire.

QWKSNKE · 03-10-2006, 09:36 PM

I run whatever is recommended on the tire label of the vehicle which on my car is 32 front 28 rear. However with the 555 RII's on the rear I usually run no more than 25psi so that the centers do not wear out

redhorse · 03-11-2006, 04:51 AM

Quote:

Originally Posted by QWKSNKE

I run whatever is recommended on the tire label of the vehicle which on my car is 32 front 28 rear. However with the 555 RII's on the rear I usually run no more than 25psi so that the centers do not wear out

But on the side wall of the tire it says and if I am not mistaken 44 psi on the Nittos. So how much do you use to keep the car from bouncing all over the road? I have run 30 - 32 all the way around and the tires after 30,000 miles begin to wear in the middle and not on the edge. Please forgive my pea brain but I would like some insight on why such a high inflation is printed on the side of the tire. And if I am under inflating are the tires wearing out to quickly.

Craig K. · 03-11-2006, 06:22 AM

you have to remember that the PSI in a tire is not the only wear factor of how a tire will preform (weight, suspension, wheel, etc...) Tires are made for many different applications, thus, the tire manufactures are required to print the maximum rating the tire can hold to meet the DOT rating (I believe).

I generally run 35-37 (cold) in my mustang, when it is summer time i will lower it by about 2-3 PSI.
In SUV I will run about 32-34.

QWKSNKE · 03-11-2006, 07:09 AM

Quote:

Originally Posted by redhorse

But on the side wall of the tire it says and if I am not mistaken 44 psi on the Nittos. So how much do you use to keep the car from bouncing all over the road? I have run 30 - 32 all the way around and the tires after 30,000 miles begin to wear in the middle and not on the edge. Please forgive my pea brain but I would like some insight on why such a high inflation is printed on the side of the tire. And if I am under inflating are the tires wearing out to quickly.

I never have really had the problem with the tire 'bouncing' on the road. The higher the pressure the more likely the center will wear especially so if you do a lot of hwy driving. Only time I would jack up the tire pressure to 40 psi or so is if i was going to do some autocross racing.

redhorse · 03-11-2006, 08:38 AM

OK let me change my termanology. Instead of bouncing, lets say the steering seems very sensitive and there seems to be a roll factor, the car just seems unstable. That is when the psi is high.

NightHawk756 · 03-11-2006, 11:50 AM

I always run my tires around 5 psi less than what the max psi is. And I've never felt a problem with them. I feel more of a problem the lower I run the psi. On my patrol car, the max psi is 44. Anything less than 40 rides like crap and gets the "roll feeling" you describe. And it even looks like I have flats.

redhorse · 03-11-2006, 07:28 PM

I may just be wanting the perfect ride.

AngelEyes · 03-11-2006, 09:09 PM

Quote:

Originally Posted by QWKSNKE

if i was going to do some autocross racing.

bring it! Cupcake!

03-10-2006, 08:18 PM	#1
redhorse Senior Member Join Date: Jul 2005 Location: Trussville, Al Posts: 819	Tire Inflation Just bought a new set of tires. On the sidewall the max psi is 51 psi. What is the opinion of what pressure to run? They were set at 45 and the car felt like it was bouncing down the road, so I dropped them down to 42 and they are a lot more friendly.

03-10-2006, 08:34 PM	#2
Hotrod Member Join Date: Feb 2006 Posts: 68	Re: Tire Inflation I usually run aroud 35 in all my vehicles. We got a 96 explorer, 01 ranger, and the 93 mustang and they have roughly 33-35 pounds in each tire.

03-10-2006, 09:36 PM	#3
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	Re: Tire Inflation I run whatever is recommended on the tire label of the vehicle which on my car is 32 front 28 rear. However with the 555 RII's on the rear I usually run no more than 25psi so that the centers do not wear out

03-11-2006, 06:22 AM	#5
Craig K. Nothing new here Join Date: Dec 2004 Location: Senoia, GA Posts: 2,990	Re: Tire Inflation you have to remember that the PSI in a tire is not the only wear factor of how a tire will preform (weight, suspension, wheel, etc...) Tires are made for many different applications, thus, the tire manufactures are required to print the maximum rating the tire can hold to meet the DOT rating (I believe). I generally run 35-37 (cold) in my mustang, when it is summer time i will lower it by about 2-3 PSI. In SUV I will run about 32-34. __________________ 1974 Triumph TR6 1985 Monte Carlo SS 1986 Mustang GT 2011 KIA Optima GTS

03-11-2006, 08:38 AM	#7
redhorse Senior Member Join Date: Jul 2005 Location: Trussville, Al Posts: 819	Re: Tire Inflation OK let me change my termanology. Instead of bouncing, lets say the steering seems very sensitive and there seems to be a roll factor, the car just seems unstable. That is when the psi is high.

03-11-2006, 11:50 AM	#8
NightHawk756 Si vis pacem, para bellum Join Date: Dec 2004 Location: Tick-Tock, Tick-Tock....... Posts: 5,146	Re: Tire Inflation I always run my tires around 5 psi less than what the max psi is. And I've never felt a problem with them. I feel more of a problem the lower I run the psi. On my patrol car, the max psi is 44. Anything less than 40 rides like crap and gets the "roll feeling" you describe. And it even looks like I have flats. __________________ 1989 Saleen SSC 1988 AL DPS SSP

03-11-2006, 07:28 PM	#9
redhorse Senior Member Join Date: Jul 2005 Location: Trussville, Al Posts: 819	Re: Tire Inflation I may just be wanting the perfect ride.