Rapid Z

For winter storage to avoid tire and sidewall damage during the winter months when the car is not being used. That’s a new one on me. Learn something every day

Andybump

The Owner's Manual does not say anything like that. But I did find a recommendation on a Goodyear site - that says if you must leave the tires on the car," tires should be inflated to the vehicle recommended inflation pressure(s) – including the spare tire; and high-performance tires with an overlay should be inflated to the maximum inflation pressure shown on the sidewall of the tire. However, it is important to readjust the inflation pressure back to the inflation pressure shown on the vehicle placard before driving the vehicle.". I'm not sure what a high performance tire "with and overlay" means. But subsequent posts from a Michelin site specifically say that there is no advantage, with respect to flat spotting, to over-inflating the tire.

This is from that Goodyear website - and the attachment is from the Owners Manual:

Should I Remove My Wheels/Tires from the Vehicle for Storage?

If possible, it’s recommended to remove your tires from the vehicle for proper long-term tire storage. Tire removal allows you to isolate the conditions your tires are stored in, while removing stresses on the tire such as vehicle weight, temperature fluctuations, etc.

Note: Another benefit of removing your tires for storage is that when it’s time for the tires to be installed on the vehicle again, the tires may be rotated from their previous positions. To do this easily, make a note of the placement of the tires on your vehicle at the time of removal, then they may be rotated accordingly when reinstalling them.

What if I’m Not Able to Remove My Tires from the Vehicle?

In situations where you are unable to remove the tires from the vehicle for storage, keeping the tires on the vehicle requires special considerations to do it properly. First, it’s ideal to remove the weight from the tires. This can be accomplished by resting the car on jack-stands or similar load bearing devices under the chassis of the vehicle. If you’re unable to remove the weight from the tires, it is recommended to have the vehicle completely unloaded, so only the minimum weight will be placed on the tires.

If the vehicle is planned to be stored for long periods of time, plan to move the vehicle periodically (at least once every 3 months or once every 30 days for vehicles with high-performance tires featuring an overlay) during storage so that the tires aren’t subjected to a constant state of deflection affecting only one part of the tire. This periodic movement will help avoid temporary flat spotting that can develop from sitting static too long and minimize ozone/weather cracking.

Tires should be inflated to the vehicle recommended inflation pressure(s) – including the spare tire; and high-performance tires with an overlay should be inflated to the maximum inflation pressure shown on the sidewall of the tire. However, it is important to readjust the inflation pressure back to the inflation pressure shown on the vehicle placard before driving the vehicle."

Kracka

He's an idiot, and this isn't the first time he's said something dumb. Do not inflate your tires to 50 psi... We're not in 1960 anymore. That entire dealership is clickbait.

JDSC8VETTE

I don't do anything to my tires during storage but maybe next time I will over inflate them a bit.
I was told that modern tires won't suffer any permanent flat spots due to better materials and technology. I find that you will feel flat spots even after short periods of non use but after a few miles of driving they will go away.

golddog

https://www.michelinman.com/auto/aut...-flat-spotting

Key point from above link:

Will over-inflating my tires help prevent flat spotting?

No, in general over-inflating your tires will not help flat spotting. In some cases it could make it worse. We recommend placard pressure and not higher.

Kracka

This is correct. At most, inflate +5 psi over the recommended pressure in the fall going into winter storage, then readjust as needed back to recommended pressure come spring when you pull it out. One quick spin around the block and the tires will be back to perfectly round with zero vibrations.

If you want something to "cradle" your tires, you can park on thick rubber mats or sheets of pink foam insulation to get your tires off the concrete.

blackvetterzo6

I’ve had corvettes for 40 years and have never done this, not one flarr spot on any tire.

Newdude

I've not inflated that high, but for sure when going into storage I've always upped the PSI by 5-10 PSI over the cold spec, then air down when coming out. Worked for me for years now, no flat spotting.

papillion

If you are running 6.70/15 bias ply.

Vetteman Jack

I keep my tires at the recommended PSI as shown on the door sticker. Has worked very well for me over the years.

Foosh

I've never had a vehicle on radial tires ever experience permanent flat-spotting, and I used to have a fairly large collection. I've seen temporary flat-spotting, which always disappears after the tires warm up and after no more than 10 miles of driving.

I've always kept tires inflated to manufacturer spec only. Sounds like someone is stuck in the bias ply era. Radial tires have been standard since 1976. Flat-spotting is another one of those outdated concerns that are passed from generation to generation. It might have been a problem for your father or grandfather.

Avanti

Gobble-de-gook.

Red Mist Rulz

The tires are from Michelin. Michelin says keep them at placard pressure (post # 5, above). I think Michelin knows better than "Chuck." Thinking you're smarter than Michelin just proves the opposite.

Isn't Chuck the guy who almost dropped a C8 off a lift the first time he worked on one, because he didn't use the right lift points?

Kevin A Jones

What's most amazing is there's so many who believe everything they read on the internet. I don't know who this guy is, however a statement like that I now know he's an idiot.

Modern tires do not flat spot at least not to the point that won't be worked out by the time you have driven a block or so.
Now I know from experience that the original style bias-ply tires for the C2-C3s will definitely flat-spot if car is stored very long.

C5racecar

My winter storage solution; If it is not raining or snowing, take it out for a drive.

449er

Lol, Pretty much

brocco

It was on the internet, it's got to be true

Red Mist Rulz

Ghost 23

I need to go out to the garage and find my C8 spare tire.

John Harry

It's under the back seat.