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Old 03-15-2012, 11:17 PM   #1
LS WON
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Default Recommended Tire pressure?

On label on door its 30 PSI.
Tire shop recommends 35 PSI.
Alignment shop also recommends 35 PSI.

What is everyone here putting their tire pressures at for street driving?
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Old 03-15-2012, 11:21 PM   #2
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30 psi cold.
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Old 03-15-2012, 11:21 PM   #3
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I keep mine at 30 cold.
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Old 03-15-2012, 11:25 PM   #4
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Quote:
Originally Posted by LS WON View Post
On label on door its 30 PSI.
Tire shop recommends 35 PSI.
Alignment shop also recommends 35 PSI.

What is everyone here putting their tire pressures at for street driving?
30 PSI cold and my tire shop agrees
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Old 03-15-2012, 11:26 PM   #5
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I always go with the door label.
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Old 03-15-2012, 11:28 PM   #6
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30 psi cold and with even tire wear. I think with 35 psi the ride will be rough and the center of the tire will wear down quicker.
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Old 03-15-2012, 11:40 PM   #7
Gary '09 C6
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I try to keep it at 32 psi front and 30 psi rear (cold).

guess I'm just different !
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Old 03-15-2012, 11:45 PM   #8
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Tire shop and alignment shop didn't build the car. The folks that built the car tell you to put 30 psi when cold in there.

Are you going to let the tire shop and the alignment shop tell you when to change the oil?
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Old 03-15-2012, 11:52 PM   #9
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The tire was developed for GM and the Corvette. The tire pressure was determined through extensive testing. It is set up for the heat that occurs during use which will increase the tire pressure as you drive. My tires generally move up to 33 or 34 lbs during use, which is what I guess GM wanted the tire pressure to be while the car is in motion.

Of course the 2008 manual mentions on page 5-67, "If you will be driving your vehicle at speeds of 175 MPH (282 KM/H) or higher, where it isi legal, set the cold inflation presssure to the maximum inflation shown on the tire sidewall. or 38 PSI (265kPa), whichever is lower. (Gotta love it)

Last edited by Rocketmanwpb; 03-16-2012 at 11:33 PM.
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Old 03-16-2012, 12:33 AM   #10
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Quote:
Originally Posted by Mike's LS3 View Post
30 psi cold and with even tire wear. I think with 35 psi the ride will be rough and the center of the tire will wear down quicker.
Yes they do ride rougher but do get better gas mileage if that's imprtad
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Old 03-16-2012, 12:35 AM   #11
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Quote:
Originally Posted by Rocketmanwpb View Post
The tire was developed for GM and the Corvette. The tire pressure was determined through extensive testing. It is set up for the heat that occurs during use which will increase the tire pressure as you drive. My tires generally move up to 33 or 34 lbs during use, which is what I guess GM wanted the tire pressure to be while the car is in motion.
at 30 psi cold, tire pressure will increase on average 3 to 4 lbs at operating temps.
Can be slightly higher or slightly lower depending on the temperature of a particular day.
Also, something I found by accident one warm Spring day driving with Winter cold weather psi in my tires.
I didn't let any air out so the cold weather psi increased with the warm temperature to around 32 - 33 psi before driving.
Once the tires reached operating temps the psi did not rise the normal 3 to 4 psi, ..
it averaged 4 to 6 lbs higher than the cold psi setting
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Old 03-16-2012, 12:37 AM   #12
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30 psi (on the door placard). If you race the vehicle, the owner's manual provides recommended pressure.

By the way, a tire shop did not engineer the car. Therefore, I always set the pressure to the manufacturer's specifications.
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Old 03-16-2012, 12:37 AM   #13
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I did keep my factory GY runflats on 30 PSI and got 40,800+ miles on front still had lots of wear left on rears.
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Old 03-16-2012, 12:41 AM   #14
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Quote:
Originally Posted by LS WON View Post
I did keep my factory GY runflats on 30 PSI and got 40,800+ miles on front still had lots of wear left on rears.
I did keep my factory GY runflats on 30 PSI and got 40,800+ miles on front still had lots of wear left on rears.
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Old 03-16-2012, 12:57 AM   #15
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I check mine at least once a month cold with a quality tire gauge. I consider the door label the recommended low limit for efficiency, comfort and even wear assuming alignment is correct for daily driver use. And I might bump it up 1-2 psi all around just to firm it up a little bit. At road temp the variance I have experienced can be up to +5 psi so my working range is usually between 30-35. When I got the car the GY RF set were shot at only 17k mi and the alignment was clearly off but a new set of Toyo T1Rs and a quality alignment seems to have solved all troubles.
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Old 03-16-2012, 06:16 AM   #16
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but you are now not running stock tires, or stock sizes, are you???? that's a question.

regardless, why not ask these two shops why, despite what the label says, they recommend 35 lbs. cold (I presume they mean cold)?

now you know.
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Old 03-16-2012, 07:00 AM   #17
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Quote:
Originally Posted by Mike's LS3 View Post
30 psi cold and with even tire wear. I think with 35 psi the ride will be rough and the center of the tire will wear down quicker.
Unlike conventional profile tires, many ultra low profile tires will actually wear the outer edges first when over inflated.
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Old 03-16-2012, 07:13 AM   #18
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I like to run mine at 32 cold. A couple of extra PSI helps when the temp drops 30 degrees from day to day, which it does in upstate NY.
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Old 03-16-2012, 07:48 AM   #19
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You might get away with 35 cold during the summer when the temperature isn't changing as much as it will in the spring and fall but you are going to have problems with the TPMS saying high pressure at 35 cold when they are set when the outside temp is cooler. The factory said 30 and the TPMS system was designed for 30. I run 30 rear and 32 front because of driving style but it takes a lot of driving to know the style justifies that change.
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Old 03-16-2012, 07:55 AM   #20
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Quote:
Originally Posted by FortMorganAl View Post
You might get away with 35 cold during the summer when the temperature isn't changing as much as it will in the spring and fall but you are going to have problems with the TPMS saying high pressure at 35 cold when they are set when the outside temp is cooler. The factory said 30 and the TPMS system was designed for 30. I run 30 rear and 32 front because of driving style but it takes a lot of driving to know the style justifies that change.
I believe the over pressure or under pressure message occurs at 20% difference from 30 psi. At 35 cold you're only one pound away from getting a high pressure message, which will certainly happen once the tires warm up.
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Old 03-16-2012, 07:55 AM
 
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