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Old 06-19-2023, 05:48 PM   #1
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Sailun Tires Overheating

On the way up to and on the way home from a trip last week three different tires (not at the same time) seemed to be overheating. Our TPMS is set for a high temp limit of 130 degrees. Three of the tires hit 135 degrees with about 124-128psi. One reached 131 degrees at 127 psi. All tires cold temps were between 105-107 psi when outbound and inbound trips began. Sailun info sheets say for our weight and 7000 pound axles we should cold fill to 110. Not sure if I should set the high limit to 140 degrees and not drive myself crazy looking at the TPMS all the time or if there is another issue at play. Has anyone else had this temperature situation?
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Old 06-19-2023, 06:00 PM   #2
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As far as I understand it and according to Google;

What temperature is too high for trailer tires?

I usually recommend setting your TPMS to alarm at about 158 degrees Fahrenheit. If you have a tire position that gets to this level, then you likely have a problem. Setting it at 158 degrees Fahrenheit still gives you time to get off the road before damage is done to your tire because of the climbing heat.

My GMC is preset and has a built in TPMS system. I see 130 degrees in the summer at 110 PSI and 95 deg weather. It's still green. I don't think I've seen the pressure reach those levels. I want to say 115 PSI maybe?

More from Google;
If you check your tire pressures in the morning with temps in the 70's then head out across a desert where temps can be 110-120 degrees your tire temp can rise to 130 degrees or more. The average tire will gain around 5 psi, well within the design limit for a tire.
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Old 06-19-2023, 06:56 PM   #3
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This is normal. The higher the outdoor temperature, road temperature, speed and tire pressure the higher the tire temperature and pressure.
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Old 06-20-2023, 04:47 AM   #4
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It's also common to see temps differ from one side to the other depending on which side the sun is shining on. My TPMS came with default of 158 degrees for high temp warning.
We regularly see temps in 120's and 130's when travelling in the hot south.
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Old 06-20-2023, 07:22 AM   #5
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Currently on my second year with Sailun S637 ST 235/85x16 tires.. Cold inflation 105 psi.. Weight of my fifth wheel around 13K.

Tow speed - steady 62 mph
Tire Temp of all four tires - depends on the outside temp and if sun is shining on the tires..
.. I usually see around 20 to 30 degree temp difference on the tires versus outside temp
Tire pressure - all four tires build up 10 psi over the cold inflation within a few miles of towing
.. last tow the average temp was 80 degrees and tire pressures averaged 118 to 122...

My high temp limit is set to 145 degrees and tire psi at 90/130

My previous 14 ply tires ( Not Sailun ) were run for 7 years 35K miles and the temps and pressures were around the same as the Sailuns

** I do not tow in 100 degree outside temps and wont... too hard on the truck let alone the fifth wheel
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Old 06-20-2023, 10:39 AM   #6
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The TST monitor comes with the high temp alarm set to 158 degree (F) and they specifically recommend you not change that setting. They recommend setting the high pressure alarm at 125% of the rated inflation (110 psi for Sailuns so the alarm should be set at ~137 psi).

We just returned from 30 days on the road from Texas to the east coast. We were blessed with very nice weather for most of the trip, but for our last 2 days the air temp was near 100 by mid afternoon along I-10 in LA & TX. The tire temps were reading ~145 and I confirmed that with an IR temp gauge at rest stops. Pressure was hovering around 125 on all 4 tires which started out "cold" each morning at 110.

We had a crosswind and the tire temps on the side away from the wind were occasionally higher because of the pressure on the windward side of the RV from the 20 mph winds.
Clark & Peggy
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Old 06-20-2023, 09:20 PM   #7
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Youtube video from TST about the temp setting.
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Old 06-21-2023, 08:32 AM   #8
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I've experienced temps up to 135 degrees. I would start being concerned at 150+.
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Old 06-26-2023, 10:47 AM   #9
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If you run your tires max inflation, 109-110, that is when they will run the coolest available tire temps. I have pulled all kinds of trailers and always inflate to max tire pressure. Your temps and pressure are fine. As others have said, your TPMS is pre set, so don’t change that. When checking hot tires, also check your axle hubs. If you have a bearing going bad, that can also heat up a tire as well as your hubs. Also torque check your wheel lug nuts for proper torque before every trip. Mine are 120lbs.
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Old 06-27-2023, 07:28 AM   #10
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When tire questions come up, I like to ask the question... Are you towing faster than the rated speed limit of the tires? Not the posted speed limit on the road, the speed limit on the tires. Speeding on your tire rating opens a window to problems. I'm just asking?
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Old 06-27-2023, 07:46 AM   #11
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Just returned fro the coast. 60 to 90 degrees, 60 to 65 MPH. 100 PSI, tire temp 110 to 130 degrees.
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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