Tire Pressure for Winter Storage
#1
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Hello all:
I heard Charles of HumbleMechanic on YouTube explain that as part of PDI (pre-delivery inspection) the technicians reduce tire pressure, and that the cars are transported and stored by VW (and, presumably, Porsche) with higher tire pressures to avoid flat-spotting.
Anyone familiar with this? Do you know what pressures are involved?
I'm looking at another month of storage right now before we take our car out. I was wondering if it made sense to pump the tire pressures up, maybe 55, 60 psi.
I have had problems with flat-spotting on another car that was stored for about five months.
I heard Charles of HumbleMechanic on YouTube explain that as part of PDI (pre-delivery inspection) the technicians reduce tire pressure, and that the cars are transported and stored by VW (and, presumably, Porsche) with higher tire pressures to avoid flat-spotting.
Anyone familiar with this? Do you know what pressures are involved?
I'm looking at another month of storage right now before we take our car out. I was wondering if it made sense to pump the tire pressures up, maybe 55, 60 psi.
I have had problems with flat-spotting on another car that was stored for about five months.
#2
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the conventional wisdom is that the pressure should not be higher than the maximum stated on the tire sidewall.
#3
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I stored mine since early December 2021 and set at 34 front/38 rear. I just checked them this morning and they are at 32/36.
#4
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I inflate mine to maximum PSI listed on the tire. 50 PSI.
#5
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Typically between 45-50. Max is 50 on my tires. Tires also will loose a small amount of pressure by sitting.
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And your first drive out of storage will normally remove all traces of flat spotting…..
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Originally Posted by breny4104
the conventional wisdom is that the pressure should not be higher than the maximum stated on the tire sidewall.
The reality is, modern tires really don't flat spot anymore, and if they do, it's completely reversible upon a good heat cycle.
It always amuses me just how long it takes to bleed the air in the spring. Especially the big fat 21" rears.
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Last edited by LexVan; 02-22-2022 at 11:19 AM.
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I'm glad Porsche started putting this info back into the Owner's Manual. For several years, it was gone.
Good example here:
Winter storage tire pressure - Rennlist - Porsche Discussion Forums
Good example here:
Winter storage tire pressure - Rennlist - Porsche Discussion Forums
![](https://cimg3.ibsrv.net/gimg/rennlist.com-vbulletin/1297x973/winter_storage_owner_s_manual_f006363d97097f04c15eb5ed7d5443fc4fbbdec9.jpg)
Last edited by LexVan; 02-22-2022 at 10:46 AM.
#12
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I'm glad Porsche started putting this info back into the Owner's Manual. For several years, it was gone.
Good example here:
Winter storage tire pressure - Rennlist - Porsche Discussion Forums
Good example here:
Winter storage tire pressure - Rennlist - Porsche Discussion Forums
![](https://cimg3.ibsrv.net/gimg/rennlist.com-vbulletin/1297x973/winter_storage_owner_s_manual_f006363d97097f04c15eb5ed7d5443fc4fbbdec9.jpg)
That's what I'm going to do.
I think normal recommended pressure is 45 psi rear, so it's another 13 pounds.
I'm not sure about locking the car. Not sure why that's necessary in my own garage.
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Originally Posted by garthg
I'm not sure about locking the car. Not sure why that's necessary in my own garage.
During winter hibernation I secure all the car keys in a barometric safe, and turn off most all the insurance (State dependent).
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Ohhh, and don't run 45 psi in the rear during the driving season. Try 36-38.