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03-01-2015, 03:00 PM
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#1
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Montana Fan
Join Date: Jan 2015
Location: Elgin
Posts: 140
M.O.C. #15975
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Normal Pressure and Temp for TPMS?
I am running the stock tires and installed TPMS. Cold inflation is at 80 psi. What is considered "normal" rise while running? I had 95 psi on two of the tires and 87 on the other two. Temps around 60. Is this ok?
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Jeff and Kristi
2015 F350 King Ranch Crew Cab SB 6.7 PSD
2013 3900FB
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03-01-2015, 04:34 PM
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#2
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,698
M.O.C. #12947
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When we had the Marathons, I set the low pressure to 70 psi, and left the other settings alone. Now that we are running the G614's, I have the low pressure set to 100 psi, and again, all the other settings are the default numbers that the monitor came with. Depending on the ambient temperature, and the temperature of the pavement, the tire temps can cover a wide range, as well as the high pressure from the initial cold pressure the tires are inflated to. No need to worry too much about anything except the tires being under inflated. As you travel, you will get used to checking the monitor as it scrolls to each tire, and you will see the temps being higher on the sunny side of the rig, and pressure variations between all the tires.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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03-01-2015, 04:44 PM
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#3
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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I use TST brand monitors and they recommend setting the alarm at 20% above and 10% below where you inflate your tires too. Temps are going to vary significantly with weather and road conditions, but as long as it's not over 157 degrees your fine. Based on this, your two at 95degrees are getting close to the 20%.
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Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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03-02-2015, 05:32 AM
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#4
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Montana Master
Join Date: Feb 2005
Location: Haysville
Posts: 4,261
M.O.C. #3085
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Although I use TPMS and it saved me a flat out on the road shortly after I installed it ... it can create a bit of parinoia watching the screen. Going down the road, temps will rise 10 - 15 degrees maybe more on a really hot day. On a hot summer day, the side with the tires to the sun will be several degrees more as well as a few lbs more than the shaded side. When temps in winter months fall significantly static tire pressure will drop several lbs. This has always been going on before you got a tire monitor ... now you can see it on the screen. Set your alarms as needed and the rest is just more fluff to having a TPMS onboard.
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03-02-2015, 03:13 PM
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#5
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Montana Master
Join Date: Aug 2004
Location: Livermore
Posts: 5,145
M.O.C. #1920
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I would say that your pressure is normal. Typically the two sides of the Montana will be close to the same temp. Not just sun side but weight distribution of your unit. You might want to have each tire weighed at a rally to see if that is impacting your pressure. If you don't have temperature on your TPMS, you might want to get an infrared thermometer also.
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Ron and Terrie Ames - MOC #1920/KF0NTA
2021Montana 3230CK Super Solar Legacy Package
2021 Ram 3500 Laramie Longhorn, BIM Charging
4x4, SRW, LB, Crew Cab, Pullrite 3900 Hitch
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03-02-2015, 11:22 PM
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#6
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Montana Fan
Join Date: Apr 2013
Location: Lehigh Acres
Posts: 492
M.O.C. #13354
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Two to three times I had temperature spikes up into the 170's on my front tires. I turned the sensor off to reset, and yet the temperatures were in the 170's.
I could not figure it out until I took my truck into Ford for an oil change.
They checked my front brakes, and the calipers were sticking against the disc.
I had to replace both. So, if you should ever see a temp spike like that, consider your brakes.
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03-03-2015, 12:06 AM
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#7
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Montana Master
Join Date: Mar 2013
Location: Frostproof, FL USA
Posts: 2,362
M.O.C. #13272
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Quote:
quote:Originally posted by Goin 4 Broke
I am running the stock tires and installed TPMS. Cold inflation is at 80 psi. What is considered "normal" rise while running? I had 95 psi on two of the tires and 87 on the other two. Temps around 60. Is this ok?
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I think you readings are normal, however on both my Montana units I have never ran the OEM tires. If the 8 degree temperature difference is from side to side, then I am guessing you are a little heavy on one side of your trailer. Even if I have all sun on one side of mine while towing I only end up with a 2 or 3 psi difference, but that is with G614's.
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Previous: 2008 Montana 3400RL & 2014 3725RL
Current: Full Time 2022 SOB TT Toy Hauler
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03-03-2015, 02:18 AM
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#8
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Montana Master
Join Date: Feb 2004
Location: Brandon
Posts: 3,944
M.O.C. #1034
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I believe your pressure increases while running look normal. We are running 614s as well though and we never notice a difference in pressure from tire to tire of more than 2 - 3 psi, perhaps with a different tire it could be greater.
Our previous unit was a lot heavier on the drivers side but we still didn't ever experience more than 2 - 3 psi difference.
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Darwin & Maureen DeBackere
Minnedosa, Manitoba, Canada
2011/3500/Silverado/4x4/DRW/Duramax
2017/3721RL/Legacy Pkg./Pressure-Pro
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