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Old 06-06-2022, 07:43 AM   #1
jsb5717
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TST 507 temp setting

I’m wondering how others set their temp settings for their tires. Almost to destination yesterday and a temp alarm went off on my TV. I apparently had the alarm set for 100 degrees and one tire hit that temp. If I remember correctly I set that temp based on the setup recommendations. Maybe I just set it wrong…can’t remember. But the front tires were running around 108 degrees without an alarm so probably user error.

I’m trying to find online what the realistic safe temp range is for my Cooper Discoverer AT tires but haven’t found it yet.

What do others do?
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Old 06-06-2022, 08:17 AM   #2
bsmith0404
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If I remember correctly the default temp setting is 156. I don’t bother changing it. I read somewhere (maybe TST guide) that typically tire failures due to temps occur above 160 degrees. We tow a lot in the hot southwest weather so we’ve seen tire temps in the high teens low 120s. If I was going to change the default setting, I’d probably set it for 130ish
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Old 06-06-2022, 08:33 AM   #3
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I can't recall the default temp on my TST507 but I didn’t change it.
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Old 06-06-2022, 08:55 AM   #4
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I believe it's 156 (read it long time ago but think that's right). I didn't change it. Tire temps vary a lot in the S but generally run somewhere around 120s in summer.
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Old 06-06-2022, 09:28 AM   #5
jsb5717
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Thanks for the input. I just went through the set up on the TST to double check where things are. I realized that the alarm I got wasn’t for temp but for PSI. The default temp is actually 158 and that’s where I left it. My TV rear tires were set to alarm at 90psi. I believe I got to that number based on their percentage recommendations over the cold setting…which for my TV is 75psi on the rears. However, 90psi does seem a little low for a tire rated at 80psi max. I bumped it up to alarm at 95psi and will just keep an eye on it.

How far above cold setting do others set their psi alarms?
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Old 06-06-2022, 09:34 AM   #6
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I’m confused, your low setting alarm should be lower than your cold psi. For example, if your cold psi is set to 75, the alarm should be set around 67. The high setting could be at 90 psi
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Old 06-06-2022, 09:46 AM   #7
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Quote:
Originally Posted by bsmith0404 View Post
I’m confused, your low setting alarm should be lower than your cold psi. For example, if your cold psi is set to 75, the alarm should be set around 67. The high setting could be at 90 psi
Sorry for the confusion. My TV placard says to use 75psi on the rear tires, which is where I have it. I had my high psi alarm set at 90psi. My alarm went off yesterday when that tire actually hit 90psi (the other rear tire was at 88psi). It didn’t go above that. I slowed down for a few minutes and it dropped back to 88psi. With the alarm I would have stopped but didn’t see anything far enough out of range to actually cause an immediate problem. We arrived at our park a few minutes later.

Outdoor temp was about 90 degrees and we were going about 65mph. We’ve been in much hotter weather without any alarms so not sure why the psi got to 90 this time and not ever before. I just set the high pressure alarm to 95psi thinking the tire shouldn’t be hurt at that psi. Am I wrong?
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Old 06-06-2022, 01:00 PM   #8
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Should be fine. It may have had more load on it for this trip, the sun may have been hotter and hitting it more than your past trips, the road surface may have been different or a combination of many other things. I watch the temps more than the pressure since the pressure can vary so much. The temps tend to stay fairly consistent compared to ambient temps. If you have one that is significantly warmer than another, that’s a good indicator that something else may be bad. Could be the tire, brakes, bearings,……
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