When I had the trailer tires replaced I had metal valve stems put on and then added 507 TPMS . I noticed on Thursday coming home the tires on the west side of the trailer were running 10 degrees hotter and 2 lbs. higher pressure.Is this normal that the sun side runs a little hotter?Something happened on the way home that was really strange. I have been towing campers since 1996 and have never had this experience. It was kind of weird and a little spooky,WE pulled in to a rest area on I43 and the truck/trailer side of the rest area was completely empty. I think there were 30 slots there and we were the only thing in the rest area for at least 1/2 hr.

You made a good choice with the 507 setup. You will see sun and shade side differences and it is normal. You can see a bigger difference depending on road surface. Sun on the tires and asphalt pavement will give the biggest changes. Sun directly overhead will equalize them. With the trailer in the back of the property I could tell where the sun is just by tire temperatures. Until someone comes out with White UV resistant tires we will have to deal with Black heat absorbing tires. The up side is that they are built to deal with the heat and pressure changes. We have experienced empty truck side lots in rest stops. Mostly mid morning and mid afternoon times when the big guys are trying to get in maximum tire rotations. Yes, strange but not all that unusual.

on the side of my trailer that the exhaust comes out my truck ...the temp and pressures will run higher.

The tires on the sunny side of my RV are always hotter and higher psi then the shade side.

Yep, the side in the sun is always a bit warmer and a couple of PSI higher in pressure. No need to worry on this little change.Ken

grizz272 wrote:When I had the trailer tires replaced I had metal valve stems put on and then added 507 TPMS . I noticed on Thursday coming home the tires on the west side of the trailer were running 10 degrees hotter and 2 lbs. higher pressure.Is this normal that the sun side runs a little hotter?Something happened on the way home that was really strange. I have been towing campers since 1996 and have never had this experience. It was kind of weird and a little spooky,WE pulled in to a rest area on I43 and the truck/trailer side of the rest area was completely empty. I think there were 30 slots there and we were the only thing in the rest area for at least 1/2 hr.Perfectly normal. TST owner for over 10 years BTW

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leftybj
Explorer
Jul 12, 2021
My system has 1 sensor that reads 2 to 3 psi lower. I verified with an independent gauge and now I just factor in the difference.
cummins2014
Explorer
Jul 12, 2021
dryfly wrote:
cummins2014 wrote:
dryfly wrote:
I have a new 507 system and noticed one of the sensors reads about 3 psi lower than the others. Is this common?

No, but have you physically checked the air pressure with an air gauge to see what it is. It just may be 3 psi lower then the rest . You need to check all four to see if they all match ,to verify if it's the sensor or just air pressure difference, if you haven't already .

Certainly, that was the first thing I did! All four tires were inflated to 80 psi and checked with same digital gauge. The variation in inflation pressure continues as psi increases with road travel.

Mine differ a little as they heat up traveling, but when cold early morning no sun on them they all read equal within a psi. But no not 3 psi. Now that you know it’s probably okay to allow for that 3 psi. Or check about warranty, possibly get a new sensor.
dryfly
Explorer
Jul 10, 2021
cummins2014 wrote:
dryfly wrote:
I have a new 507 system and noticed one of the sensors reads about 3 psi lower than the others. Is this common?

No, but have you physically checked the air pressure with an air gauge to see what it is. It just may be 3 psi lower then the rest . You need to check all four to see if they all match ,to verify if it's the sensor or just air pressure difference, if you haven't already .

Certainly, that was the first thing I did! All four tires were inflated to 80 psi and checked with same digital gauge. The variation in inflation pressure continues as psi increases with road travel.
cummins2014
Explorer
Jul 10, 2021
dryfly wrote:
I have a new 507 system and noticed one of the sensors reads about 3 psi lower than the others. Is this common?

No, but have you physically checked the air pressure with an air gauge to see what it is. It just may be 3 psi lower then the rest . You need to check all four to see if they all match ,to verify if it's the sensor or just air pressure difference, if you haven't already .
dryfly
Explorer
Jul 10, 2021
I have a new 507 system and noticed one of the sensors reads about 3 psi lower than the others. Is this common?
DogTrainer
Explorer
Jul 09, 2021
Yes

sun side is hotter
Ron3rd
Explorer III
Jul 06, 2021
grizz272 wrote:
When I had the trailer tires replaced I had metal valve stems put on and then added 507 TPMS . I noticed on Thursday coming home the tires on the west side of the trailer were running 10 degrees hotter and 2 lbs. higher pressure.
Is this normal that the sun side runs a little hotter?

Something happened on the way home that was really strange. I have been towing campers since 1996 and have never had this experience. It was kind of weird and a little spooky,
WE pulled in to a rest area on I43 and the truck/trailer side of the rest area was completely empty. I think there were 30 slots there and we were the only thing in the rest area for at least 1/2 hr.

Perfectly normal. TST owner for over 10 years BTW
TXiceman
Explorer II
Jul 04, 2021
Yep, the side in the sun is always a bit warmer and a couple of PSI higher in pressure. No need to worry on this little change.

Ken
ford_truck_guy
Nomad
Jul 04, 2021
The tires on the sunny side of my RV are always hotter and higher psi then the shade side.
Learjet
Explorer
Jul 04, 2021
on the side of my trailer that the exhaust comes out my truck ...the temp and pressures will run higher.

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