Tire Pressure on non-runflats?
Thread Starter
Racer
Joined: May 2001
Posts: 259
Likes: 0
From: El Paso, TX
Tire Pressure on non-runflats?
Just had my new Bridgestone S-03's mounted and balanced. :cool: Does anyone know what the recommended air pressure is? Is it the same as the run-craps? Man, just on the ride home I noticed the difference in road noise, or should I say lack thereof. :D
Team Owner
Joined: Sep 2000
Posts: 25,025
Likes: 2,716
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Re: Tire Pressure on non-runflats? (Viprklr)
Since the stiff sidewalls on runflats do the job of some of the air pressure, I'd be inclined to run a little more pressure with non-runflats. Maybe 32-34 psi Cold? On the C4's when runflats were an option, does anyone know what the difference (if any) was between recommended pressures?
Racer
Joined: Oct 2000
Posts: 465
Likes: 0
From: Phoenix AZ
Re: Tire Pressure on non-runflats? (ace)
Just had my new Bridgestone S-03's mounted and balanced. :cool: Man, just on the ride home I noticed the difference in road noise, or should I say lack thereof. :D
Safety Car
Joined: Sep 2001
Posts: 4,596
Likes: 2
From: Atlanta GA
Re: Tire Pressure on non-runflats? (see5)
The Z06 tire pressure is also 30psi all around.
What are the Z06 stock pressures?
I have Z06 wheels with 265 and 295 NRF tires ready for Spring and need to know.
Thanks,
Bruce
I have Z06 wheels with 265 and 295 NRF tires ready for Spring and need to know.
Thanks,
Bruce
Burning Brakes
Joined: Dec 1999
Posts: 1,104
Likes: 0
Re: Tire Pressure on non-runflats? (gmblack3)
When I replaced my run-flats with Michelin Pilot Sports I had the same question. After speaking with custmer service tech at Michelin and from some feedback on this forum, there is a formula that is used to calculate the correct pressure based on the carrying capacity of the tires and the weight of the car. For my set up it is between 34 and 35 psi for the fronts and 32 for the rears. Sorry, but I can't find what that formula is.
Pro
Joined: Mar 2001
Posts: 561
Likes: 0
From: Austin, Texas USA Texas
Re: Tire Pressure on non-runflats? (fxrhm)
I run my Pilot Sprts 265/295 at 31psi front and 28 rear (cold). This gives me even tire wear. I ran my first set at 30 all around and the center of the rears wore, I wasn't using the whole tire = less traction.
Jeff
fxrhm, nice wheels, same here.
[Modified by jefffxdwg, 8:43 AM 2/24/2002]
Jeff
fxrhm, nice wheels, same here.
[Modified by jefffxdwg, 8:43 AM 2/24/2002]
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Burning Brakes
Joined: May 1999
Posts: 1,084
Likes: 158
From: New Bedford MA
Re: Tire Pressure on non-runflats? (ace)
I also mounted S-03's and I'm starting at 30 PSI. However, after reading above posts, I think that I will try the 31 front and 28 rear as I also noticed that my rear EMT's wore down more in the middle. I agree that the S-03's are a great tire. I wish that I had swapped out the EMT's years ago. What a pleasure to drive now without that harsh ride from worn run-craps!
When balancing the S-03's we found that the front 17" tires appearred to be a little out of round. I do get a slight shimmy at 80-90 MPH. However I've only put about 70 miles on these tires. I'll get an alignment this week just to be sure that lowering did not upset the alignment. :seeya
When balancing the S-03's we found that the front 17" tires appearred to be a little out of round. I do get a slight shimmy at 80-90 MPH. However I've only put about 70 miles on these tires. I'll get an alignment this week just to be sure that lowering did not upset the alignment. :seeya
Le Mans Master
Joined: Apr 2001
Posts: 5,331
Likes: 39
Re: Tire Pressure on non-runflats? (FredC5)
I just got S03's too. I'm running 32 all around as a starting point. I ran 30 in the run flats.
I've been thinking about alignment since the new tires are on. When I lowered I got an alignment right away. But I don't know that the alignment did any good because the alignment guys just dialed up the specs for the stock settings. A proper alingment would have to be calculated to the new suspension geometery.
BTW: I've always thought that over inflation wore the middle and under wore the outer edges.
I've been thinking about alignment since the new tires are on. When I lowered I got an alignment right away. But I don't know that the alignment did any good because the alignment guys just dialed up the specs for the stock settings. A proper alingment would have to be calculated to the new suspension geometery.
BTW: I've always thought that over inflation wore the middle and under wore the outer edges.
Safety Car
Joined: Sep 2001
Posts: 4,596
Likes: 2
From: Atlanta GA
Re: Tire Pressure on non-runflats? (Gary2KC5)
guys make sure that your shop uses the Hunter GSP 9700 wheel balancer. It the one that has "road force"
http://www.gsp9700.com
http://www.gsp9700.com
