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#4702361 - 03/21/18 07:05 PM Compact Spare Tire Air Pressure
das_peikko Offline


Registered: 01/01/18
Posts: 410
Loc: San Antonio, TX
What do you guys have yours set at? Mine says a maximum of 60 PSI, but 35 PSI gets it pretty hard.

I measured mine at 36 PSI today and brought it up to 40 PSI. Is that ok?

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#4702366 - 03/21/18 07:09 PM Re: Compact Spare Tire Air Pressure [Re: das_peikko]
901Memphis Offline


Registered: 08/14/10
Posts: 12864
Loc: Northern Kentucky
60 PSI, it needs high pressure to support the load, since the volume is lower
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2012 Chevy Cruze LT 1.4T - 50k
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#4702377 - 03/21/18 07:23 PM Re: Compact Spare Tire Air Pressure [Re: das_peikko]
EdwardC Offline


Registered: 11/14/13
Posts: 1815
Loc: Chicago, IL
Yep, I pump it to what it says to pump it to.

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#4702380 - 03/21/18 07:25 PM Re: Compact Spare Tire Air Pressure [Re: das_peikko]
Rand Offline


Registered: 08/20/03
Posts: 12471
Loc: NE,Ohio
60psi, since the tire cross section is much smaller it needs the higher psi
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#4702389 - 03/21/18 07:34 PM Re: Compact Spare Tire Air Pressure [Re: das_peikko]
Miller88 Offline


Registered: 04/09/08
Posts: 12625
Loc: Onondaga County
I usually go 5 or 10 above. Just so there's wiggle room should I forget to check.
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#4702390 - 03/21/18 07:35 PM Re: Compact Spare Tire Air Pressure [Re: Rand]
das_peikko Offline


Registered: 01/01/18
Posts: 410
Loc: San Antonio, TX
I'm worried about taking it all the way to 60 PSI because the original factory spare exploded and blew apart.

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#4702412 - 03/21/18 07:46 PM Re: Compact Spare Tire Air Pressure [Re: das_peikko]
slacktide_bitog Online   content


Registered: 03/20/08
Posts: 5813
Loc: USA
Can a full-size spare fit in your trunk? smile

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#4702447 - 03/21/18 08:23 PM Re: Compact Spare Tire Air Pressure [Re: das_peikko]
Nick1994 Online   content


Registered: 02/19/13
Posts: 9796
Loc: Phoenix, AZ
Squeezing a tire by hand isn't very scientific, and doesn't explain the results for a tire's load carrying capacity.
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2015 Hyundai Sonata 2.4L 76k PU 5w30 & OEM
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#4702448 - 03/21/18 08:25 PM Re: Compact Spare Tire Air Pressure [Re: das_peikko]
mightymousetech Online   happy


Registered: 04/03/17
Posts: 1313
Loc: Ontario, Canada
It has to be set to 60 to be useable.
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#4702449 - 03/21/18 08:26 PM Re: Compact Spare Tire Air Pressure [Re: das_peikko]
Chris142 Offline


Registered: 06/05/03
Posts: 16495
Loc: Deplorable in apple valley, ca
No. The little spare does not have the capacity to support your car with only 40 psi in it.it needs the full 60 psi.
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#4702456 - 03/21/18 08:28 PM Re: Compact Spare Tire Air Pressure [Re: slacktide_bitog]
das_peikko Offline


Registered: 01/01/18
Posts: 410
Loc: San Antonio, TX
Originally Posted By: slacktide_bitog
Can a full-size spare fit in your trunk? smile


Oh yeah but then I wouldn't have much space for anything else like grocery bags.

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#4702499 - 03/21/18 09:03 PM Re: Compact Spare Tire Air Pressure [Re: das_peikko]
gathermewool Offline


Registered: 01/09/09
Posts: 5869
Loc: New England
60#
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#4702504 - 03/21/18 09:08 PM Re: Compact Spare Tire Air Pressure [Re: das_peikko]
bdcardinal Offline


Registered: 06/03/05
Posts: 10800
Loc: Santa Barbara, CA
I set it to whatever the door sticker says. When I worked at Sears Auto people would get so mad at me when they saw me opening their trunk on a tire rotation. I would always set spare tire pressure and almost every one was substantially lower than not only the door psi, but were usually under 20psi.
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#4702534 - 03/21/18 09:25 PM Re: Compact Spare Tire Air Pressure [Re: Miller88]
Astro14 Offline


Registered: 10/10/10
Posts: 8344
Loc: Virginia Beach
Originally Posted By: Miller88
I usually go 5 or 10 above. Just so there's wiggle room should I forget to check.


Particularly if I do it in the summer...
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#4702710 - 03/22/18 05:51 AM Re: Compact Spare Tire Air Pressure [Re: das_peikko]
skyactiv Offline


Registered: 03/02/13
Posts: 4162
Loc: The Midwest
My VW GTI is a bit rare because it came with a full size V speed rated spare from the factory. I set mine to 38 and check it once a month. Super easy to check. It's not upside down and there is a holder to keep the trunk mat up out of your way.
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