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Compact Spare Tire Air Pressure #4702361
03/21/18 06:05 PM
03/21/18 06:05 PM
Joined: Jan 2018
Posts: 538
San Antonio, TX
das_peikko Offline OP
das_peikko  Offline OP
Joined: Jan 2018
Posts: 538
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?

Re: Compact Spare Tire Air Pressure [Re: das_peikko] #4702366
03/21/18 06:09 PM
03/21/18 06:09 PM
Joined: Aug 2010
Posts: 12,906
Northern Kentucky
901Memphis Offline
901Memphis  Offline
Joined: Aug 2010
Posts: 12,906
Northern Kentucky
60 PSI, it needs high pressure to support the load, since the volume is lower


2012 Chevy Cruze LT 1.4T - 50k
2002 Buick Century 130k - Built 4T65e(Maxlife) - Edge 0w40 + Fram XG3980
Re: Compact Spare Tire Air Pressure [Re: das_peikko] #4702377
03/21/18 06:23 PM
03/21/18 06:23 PM
Joined: Nov 2013
Posts: 1,950
Chicago, IL
EdwardC Offline
EdwardC  Offline
Joined: Nov 2013
Posts: 1,950
Chicago, IL
Yep, I pump it to what it says to pump it to.

Re: Compact Spare Tire Air Pressure [Re: das_peikko] #4702380
03/21/18 06:25 PM
03/21/18 06:25 PM
Joined: Aug 2003
Posts: 13,137
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 13,137
NE,Ohio
60psi, since the tire cross section is much smaller it needs the higher psi


2019 Jeep Cherokee Trailhawk 2.0T
Re: Compact Spare Tire Air Pressure [Re: das_peikko] #4702389
03/21/18 06:34 PM
03/21/18 06:34 PM
Joined: Apr 2008
Posts: 12,979
Onondaga County
Miller88 Offline
Miller88  Offline
Joined: Apr 2008
Posts: 12,979
Onondaga County
I usually go 5 or 10 above. Just so there's wiggle room should I forget to check.


18 Forester 2.5I 6M
00 Jeep Cherokee
01 Ford F-350 XL 4x4 5M
Re: Compact Spare Tire Air Pressure [Re: Rand] #4702390
03/21/18 06:35 PM
03/21/18 06:35 PM
Joined: Jan 2018
Posts: 538
San Antonio, TX
das_peikko Offline OP
das_peikko  Offline OP
Joined: Jan 2018
Posts: 538
San Antonio, TX
I'm worried about taking it all the way to 60 PSI because the original factory spare exploded and blew apart.

Re: Compact Spare Tire Air Pressure [Re: das_peikko] #4702412
03/21/18 06:46 PM
03/21/18 06:46 PM
Joined: Mar 2008
Posts: 7,318
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 7,318
USA
Can a full-size spare fit in your trunk? smile

Re: Compact Spare Tire Air Pressure [Re: das_peikko] #4702447
03/21/18 07:23 PM
03/21/18 07:23 PM
Joined: Feb 2013
Posts: 11,081
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline
Joined: Feb 2013
Posts: 11,081
Phoenix, AZ
Squeezing a tire by hand isn't very scientific, and doesn't explain the results for a tire's load carrying capacity.


2015 Hyundai Sonata 2.4L 88k Motorcraft Synthetic Blend 5w30 & OEM
2000 Toyota Camry 2.2L 231k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: Compact Spare Tire Air Pressure [Re: das_peikko] #4702448
03/21/18 07:25 PM
03/21/18 07:25 PM
Joined: Apr 2017
Posts: 1,481
Ontario, Canada
mightymousetech Offline
mightymousetech  Offline
Joined: Apr 2017
Posts: 1,481
Ontario, Canada
It has to be set to 60 to be useable.


Mighty Mouse Tech
BMW Tech, Former Acura Tech
2010 Civic Si Castrol 0W40, Redline MTL
2013 BMW 135i M Sport Edition Castrol 0W40, Redline MTL
Re: Compact Spare Tire Air Pressure [Re: das_peikko] #4702449
03/21/18 07:26 PM
03/21/18 07:26 PM
Joined: Jun 2003
Posts: 17,814
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,814
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.


02 Wrangler carlube 5w30
87 F250 traveler 15w40
07 fjcruiser Chevron 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: Compact Spare Tire Air Pressure [Re: slacktide_bitog] #4702456
03/21/18 07:28 PM
03/21/18 07:28 PM
Joined: Jan 2018
Posts: 538
San Antonio, TX
das_peikko Offline OP
das_peikko  Offline OP
Joined: Jan 2018
Posts: 538
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.

Re: Compact Spare Tire Air Pressure [Re: das_peikko] #4702499
03/21/18 08:03 PM
03/21/18 08:03 PM
Joined: Jan 2009
Posts: 6,520
New England
gathermewool Offline
gathermewool  Offline
Joined: Jan 2009
Posts: 6,520
New England
60#


'14 Forester XT FA20DIT (Cobb Stage 1)
Edge 0W-40 + FU filter (64,774 miles)
'15 Legacy FB25 (OEM Stage, uh, neg. 7?)
Edge 0W-20 + FU filter (40,803 miles)
Re: Compact Spare Tire Air Pressure [Re: das_peikko] #4702504
03/21/18 08:08 PM
03/21/18 08:08 PM
Joined: Jun 2005
Posts: 11,611
Santa Barbara, CA
bdcardinal Offline
bdcardinal  Offline
Joined: Jun 2005
Posts: 11,611
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.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: Compact Spare Tire Air Pressure [Re: Miller88] #4702534
03/21/18 08:25 PM
03/21/18 08:25 PM
Joined: Oct 2010
Posts: 9,121
Virginia Beach
Astro14 Offline
Astro14  Offline
Joined: Oct 2010
Posts: 9,121
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...


32 Packard 15W40
02 Volvo V70 T5 0W40 M1
02 Volvo V70 XC 0W40 Edge
05 MB S600 0W40 M1
16 Tundra 1794 5W30 Pennzoil Ultra
Re: Compact Spare Tire Air Pressure [Re: das_peikko] #4702710
03/22/18 04:51 AM
03/22/18 04:51 AM
Joined: Mar 2013
Posts: 5,030
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 5,030
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.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Wanted: 2019 Ford Ranger
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