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?:lurk:

30 psi cold.

I keep mine at 30 cold.

30 PSI cold and my tire shop agrees :cheers:

I always go with the door label.

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.

I try to keep it at 32 psi front and 30 psi rear (cold).

guess I'm just different !

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? :rofl:

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) :rock:

Yes they do ride rougher but do get better gas mileage if that's imprtad

:iagree: 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 :eek:

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.

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.

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.

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.:cheers:

Unlike conventional profile tires, many ultra low profile tires will actually wear the outer edges first when over inflated. :cheers:

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.

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.

:iagree: 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.

Always check your tire pressure after the car has
been at the tire shop - those guys love to swear by the
inflation pressure molded on the tire sidewall. They
even argue about it - to the point of disregarding your
instructions to do otherwise.

:yesnod:

29.8

With the normal street tires I'd run 30 lbs (cold) in the rear and 31-32 lbs (cold) in the front. I'd use slightly higher pressure in the front tires to help compensate for the cars 51/49 weight distribution ratio but not 35 lbs...that's too much.

:thumbs:

Cooler months I run 32 psi cold so that the pressure will be around 34-35 when up to operating temp. Hotter months, I run 30 psi cold so that the pressure will be around 34-35 when up to operating temps.

GM took into consideration the front/rear weight distribution when they spec'd 30 psi cold, and spec'd 30 psi for all four tires for how they wanted the car to react during cornering. For example, my Mercedes spec's 28 psi cold in the front and 32 psi cold in the rear and it's weight distribution is more biased to the front then the Corvette. When you start changing the air pressures front to rear you change the car's handling(understeer/oversteer) from what GM engineered the car for optimum handling.

I always run 30 cold, here in Texas when it gets 95-100 it will get between 33-35 when the tires are warmed up:rock:

Initially I did run all tires at 30 PSI as indicated. It was of late that I was told about this 35 PSI thing so my new tires will get the same outlook on life as my originals did by going back to 30 psi plus the ride is more comfortable.

I have all my tire work done at discount tire and they always use and recommend 30 lbs. pressure and 100 for the wheel bolt torque spec on the C6 vette. It even shows those on the receipt anytime they do any work on the car.

It will wear the tires in the center long before the outer tread wears out.
z51vett:hide:

this^

That is who told me this and on another occasion the person at alignment shop told me the same thing. I have always in the past followed sticker on label or in manual but was wondering why am I being told different.

My experience also, especially the center wear.

Is it possible they are thinking 35 psi warm?
Lots of people check their pressures after driving a few miles to the gas station, which warms things up. And better to be a couple of pounds high than a couple of pounds low.

The door sticker says 30 PSI (cold).

The manual says Max. inflation or 38 PSI which ever is lower for high speed driving.

I've noticed my tire pressures in the 35 - 37 PSI range once the tires have warmed from 30 - 32 PSI cold setting. This is with GY G2's.

If I'm going to be playing around I usually wait for the tires to reach that 35 - 37 PSI range to ensure they have warmed up.

I don't think so as everyone knows it when tires are cold that is when to check them.

I try to keep mine at around 32, if not a bit higher. The handling is a little crisper when you up the pressure a bit.

Gas mileage is better, handling but it can contribute to a bumpier ride.

Way off..stop misleading members..29.9

Keeping mine at 32, but might drop it to 30 for a slightly better ride, due to no curves in the desert (180 miles on the clock). Remember we're dealing with RFs here, which have a much harder sidewalls than regular tires. I'd do 33 to 35 cold with regular tires, which I plan to install after the F1:G2s crap out. Good day.

California must have different "everyones" than Illinois.
Good for you.

I can only count one or two times when a shop in Illinois has tried to mention or compensate for the difference.

Whoops, duplicate post.

Mine are at 28 cold and as they warm up im right at 30.

What I did notice though is I have less traction when the rears are over 32..

The dealer inflated to 32 at my last oil change. When the car got warm they were up around 35 and noticed a difference in both firmness of the ride and less grip in the rear under hard accelleration. So I felt anyway and changed them back to what they were.

exactly how cold is cold? :toetap:

on the few occasions I have been able to drive my car in winter the tire pressure has been close to the tripping point for low pressure warning, the outside temp was about 10F, I think it may have even been at 0 or possibly a little below, driving the car for awhile brings the pressure up to 30

on the other hand, right now the tire is at 30psi cold, but then it is 75 in March right now (normally we'd be lucky to be above freezing)

Car wants to jump on bumps.

I don't think this is true. I used 38 PSI as a starting pressure before, testing tire / pressure combinations at the track, and I never had a warning due to tire pressure.

From the service manual:

When the TPM system detects pressure above 42 psi the HIGH TIRE PRESSURE warning message is displayed
When the TPM system detects pressure between 5 and 25 psi the LOW TIRE PRESSURE warning message is displayed
When the TPM system detects pressure below 5 psi the FLAT TIRE warning message is displayed.

Up to 40 psi we got warnings:hide:

32 front and 30 rear for me...Seems to get the best wear for me.

It's been 30/30 for me.

Follow the direction on the door.

Chevy has spoken....

Always have but wonder why both Tire shop and alignment person in another shop both concur with the 35 psi?:lurk:

31 cold all year all around.

For those running 30psi, is that regardless of tire brand? I just replaced the GY's with Michelin PS2 ZP's and the tire shop pumped 'em up to 35. Still run 30psi?

same here- 32 front / 30 rear in the hope of delaying the normal front tire wear. Note they will all gain around 5 psi when hot so 35 cold is too much (imho).

GM doesn't tell you that it depends on the tire brand.

And please, don't retrieve old threads. Start a new one.

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