What temperatures are your hubs and tires running on your IR thermometer?

[MonacoMike]

My hubs are running between 100-130 degrees, usually under 125 degrees, on the lower end on the highway, and higher in city stop and go. The tires are nearly the same range but will show 10 degrees higher on the sun side especially in the afternoon. MM

 

[Lazy Daze]

I've yet to put a gun on my hubs or tires, but I can comfortably keep my hand on them (tires are cooler than hubs). Around town, the hubs can get a little hotter due to brake bleed. Doesn't directly answer your question, but hope it helps.

 

[MonacoMike]

I've yet to put a gun on my hubs or tires, but I can comfortably keep my hand on them (tires are cooler than hubs). Around town, the hubs can get a little hotter due to brake bleed. Doesn't directly answer your question, but hope it helps.

I am getting my baseline numbers so I can keep a more accurate watch and just wanted to see if others were doing the same. I can even tell which of my disc brakes is a little tighter by checking the temps. MM

 

[Go Aweigh2452]

Before I changed out my trailer races and bearings, I was getting 130-145 each side with the sunny side about 10 degrees higher. Now I get 85-95 and sometimes 100-105 on the sunny side. My trailer is a triple axle so not sure if that has any bearing on your base line but I would think your OK for a while yet with under 130. Any higher and I would suggest new bearings and races...

 

[MonacoMike]

Before I changed out my trailer races and bearings, I was getting 130-145 each side with the sunny side about 10 degrees higher. Now I get 85-95 and sometimes 100-105 on the sunny side. My trailer is a triple axle so not sure if that has any bearing on your base line but I would think your OK for a while yet with under 130. Any higher and I would suggest new bearings and races...

I have a triple. and only rarely see the 130 on one hub that the brake needs to be loosened up on. Thanks for the input, MM

 

[Bob & Sue]

here's a link started a couple months ago.

http://clubsearay.com/showthread.ph...-to-check-hub-temperature?p=492424#post492424

We don't trailer our boat but I have hauled many dual and tri axle trailers with funny cars and fuel dragsters we always ( most of the time ) checked the temp while gassing up the tow rig in 90 deg weather non brake axle's would usually run around 115 to 125 after 300 to 400 miles straight driving brake axle would usually run about 10 degrees hotter in 50 deg weather they would run about 100 to 110. When we did loose a bearing we'd see it in the mirror smoking I never had one burn up to the point of fire but a couple people I know have had their trailer and race cars burned to the ground we would usually pack the bearings about every 1500 miles if we had the time. We were hauling around about 15,000 lbs with race car, spare engines and parts.
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[JerryS]

Mike, I just did a 2200 mile roundtrip pulling 10,400# on a double axle trailer.
I was keeping a log of the tire and hub tempuratures.

Temps varied according to the time of day and distance travelled. Cool in the morning and hottest in the middle of the day.
Here are some of my readings: {Temps are: (tire/hub)}

Morning:
Lft rear truck tire........ trlr-lf...... trlr-lr..... trlr-rr..... trlr-rf
.........89................... 82/77..... 78/77.... 79/79.... 74/76

Mid Afternoon
Lft rear truck tire....... trlr-lf........ trlr-lr...... trlr-rr........... trlr-rf

.........121.............. 118/106.... 115/107.... 124/114..... 126/115

You can see which side was getting the sun. My hubs were consistently running cooler than the tires.

BTW: The weight on the trailer axles was 8860# according to a certified truck scale.

 

[MonacoMike]

Just in the 80's when the weather is 57 degrees and rainy. :grin: