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08-05-2015, 10:59 AM
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#1
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Junior Member
Join Date: Sep 2012
Location: arizona
Posts: 20
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how to set tire pressure when ambient is 115 degrees
We live in Arizona and are continuously hit with triple-digit temperatures for about 5 or 6 months of a year, with nights often not getting down to even 90 degrees.
How would you recommend getting an accurate reading and setting the tire pressures on our 21fbrs TT? If the outdoor air temp is high, it just adds to the pressure within the tire. The other day, our TV, which I normally maintain at about 36 psi, read about 44 all around. If I adjust it downward, then it seems to me like if the air temp dropped from 110, say, to 94 degrees or lower, wouldn't the tires be underinflated?
Do hope you guys have some good suggestions.
Thanks!
__________________
Wanderers thru Wonders
Flagstaff 21FBRS led by F150 5.4
Sun & Moon, direct us...
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08-05-2015, 11:09 AM
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#2
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Senior Member
Join Date: Sep 2014
Location: SW Michigan
Posts: 230
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For every 10 deg increase in ambient temp you will get about 1 psi increase. No big deal and all in the design specs. Obviously, driving also increases pressure
Set the recommended pressure in the morning even if it is 90 deg (cold pressure), before driving and before the sun beats on one or more tires as it will increase the pressure on those tires. You will have variances throughout the day and week and that is to be expected.
Expect to check pressures more often as winter approaches and temps drop (10 deg = 1 psi)
__________________
2016 Forest River Sunseeker 3100SS
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08-05-2015, 11:28 AM
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#3
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William
Join Date: Jan 2012
Location: South Louisiana
Posts: 560
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How does the heat from the road affect tire pressure under these conditions? I've had 2 tire failures under these conditions over the last 2 summers..
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2012 Crusader 320RLT
2011 F250 Lariat 6.7L
2016 (19 Nights Camped/1348 Miles)
2015 (38 Nights Camped/3560 Miles)
2014 (28 Nights Camped/1980 Miles)
2013 (30 Nights Camped/1411 Miles)
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08-05-2015, 11:34 AM
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#4
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Senior Member
Join Date: Sep 2014
Location: SW Michigan
Posts: 230
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__________________
2016 Forest River Sunseeker 3100SS
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08-05-2015, 12:12 PM
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#5
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Senior Member
Join Date: Jan 2014
Location: Mount Dora FL
Posts: 179
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don't go by the charts
I also have FBRS. Just finished a 13,000 mile trip. Stock tires have 20,000 miles. I recommend 45 psi cold morning. After a few miles they will be 55 to 60 in the summer. Raise pressure to 50 cold in the winter. This worked for me.for the past 2 years
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08-05-2015, 12:18 PM
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#6
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Phat Phrog Stunt Team
Join Date: Aug 2011
Location: Iowa
Posts: 34,507
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My tv tires are set @ 80 psi on the rear ,
Coming home from the nashville rally they hung out @ 95 psi
With tire cold set the pressure to sidewall speck and go.
TURBS
08 duramax tuned n modded
2011 32bhok Sabre
2015 camping "24 nights"
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08-05-2015, 12:36 PM
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#7
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Senior Member
Join Date: Sep 2014
Location: Western AZ
Posts: 2,404
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??
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08-05-2015, 05:02 PM
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#8
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Senior Member
Join Date: Sep 2010
Posts: 2,219
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I put 65 in mine at 80 degrees when I left Phoenix a few weeks ago. When I got to Yellowstone I added about 3 lbs each. As long as your tires are not overloaded a few lbs low is not going to matter for a short period of time.
2010 F250 5.4L 3.73
2011 Flagstaff 831FKBSS
Equal-i-zer 4pt 12K
__________________
2011 Flagstaff 831FKBSS
2010 F250 4X4 5.4L 3.73 LS
EQUALIZER E4 1200/12000
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08-05-2015, 08:27 PM
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#9
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Junior Member
Join Date: Jun 2013
Location: central pa
Posts: 16
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I have nitrogen in my tires on my vengeance since it was new. This summer my tire shop pumped out the old and put back the new kinda a recycled thing. They tell me the tire press maintains a pressure that is more stable and does heat up the way air does. Seems to make sense my tires never are hot while I'm traveling!
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08-05-2015, 08:56 PM
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#10
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Senior Member
Join Date: May 2015
Posts: 1,397
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Everything I've ever read consistently states to inflate to the required (or max psi) in the AM with no regard for ambient temps, because tires are manufactured to be safe thru large temperature swings. It sort of makes sense because you could, for example, set your PSI at 6am at 30 degrees and end the day in a desert at 120 degrees without changing your PSI.
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08-06-2015, 01:52 AM
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#11
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Junior Member
Join Date: Sep 2012
Location: arizona
Posts: 20
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thanks to all for the ideas and info!
__________________
Wanderers thru Wonders
Flagstaff 21FBRS led by F150 5.4
Sun & Moon, direct us...
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08-06-2015, 03:39 AM
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#12
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Just a member
Join Date: Jul 2011
Location: Great White North
Posts: 921
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Quote:
Originally Posted by rebryson
Seems to make sense my tires never are hot while I'm traveling!
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That extra 20 or so percent of nitrogen does amazing things.
__________________
K&L + the Wild Bunch
TT: 2011 Rockwood 8293RKSS
TV: 2019 Dodge 3500 SRW Crew HO CTD
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08-06-2015, 06:52 PM
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#13
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Senior Member
Join Date: Jul 2009
Location: Warsaw,NC
Posts: 7,184
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If you get nitrogen for free then go for it, if you have to pay for it then it's not worth a hill of beans
Sent from my iPhone using Forest River Forums
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08-06-2015, 07:23 PM
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#14
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Junior Member
Join Date: Jun 2013
Location: central pa
Posts: 16
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Got mine refilled for free and if keeps my tires running cooler it's worth it at any cost!
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08-06-2015, 07:59 PM
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#15
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Senior Member
Join Date: Jul 2009
Location: Warsaw,NC
Posts: 7,184
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Opinions, if it makes you happy
Sent from my iPhone using Forest River Forums
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08-06-2015, 08:01 PM
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#16
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Senior Member
Join Date: Jul 2009
Location: Warsaw,NC
Posts: 7,184
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Air is 78 percent nitrogen and it's free
Sent from my iPhone using Forest River Forums
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08-06-2015, 08:58 PM
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#18
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Senior Member
Join Date: Oct 2014
Location: Jonesboro AR--Home of Arkansas State University and the Red Wolves
Posts: 583
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I just installed the TST 507 Flow thru set on our 2014 Silverback 33RL last week...just returned a few days ago from a 600 mile trip(Nashville Rally) ...I know it's just one trip but everything went great with the system...I had the tire's air pressure at 80 psi when we left....6 hours constant driving one way...95 degree day...bright sunshine....psi never got over 89-90 and temperature never exceeded 106-107...on the return trip Monday.....temperature when we arrived home was 98 degrees and the readings were the same as the trip going....89-90 psi highs and 106-107 high temps.....proud I've put on the TPMS.
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Lloyd & Kathy Martin
2018 Forest River Palomino Columbus 383FB
2016 Chevy 3500HD SRW Z71 LTZ 4WD Crew Cab, DuraMax/Allison.
2014-38nights/3500 mi; 2015-66nights/6260 mi;2016-44 nights/6106 mi;2017-65nights/6992 mi;2018-47nights/7376mi;2019-65nights/7825 mi;2020-59nights/4142mi;2021-39nights/3072 mi;2022-59-nights/6149 mi;2023-36nights/3001miles.
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08-06-2015, 09:01 PM
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#19
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Senior Member
Join Date: Jul 2009
Location: Warsaw,NC
Posts: 7,184
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TST 507 is piece of mind
Sent from my iPhone using Forest River Forums
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08-06-2015, 09:05 PM
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#20
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Senior Member
Join Date: Sep 2014
Location: Western AZ
Posts: 2,404
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Help clear some air here. Was it air or Nitrogen ?
Thanks
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