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08-24-2015, 09:11 PM
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#1
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4 Rivet Member
1976 29' Ambassador
Madison
, Officially SD but are traveling full time.
Join Date: Sep 2007
Posts: 335
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A/S Wheel Temperature Question
I bought an after market TPMS system for my A/S and TV. It is nice to be able to know that the pressure is being monitored but I also get wheel temperature readings as well. Today the ambient temperature was 80F. After an hour of driving the wheel temp got up to 120F.
What is the normal range for wheel temperatures?
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08-24-2015, 09:35 PM
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#2
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3 Rivet Member
2015 23' International
Charleston
, South Carolina
Join Date: Nov 2012
Posts: 168
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That sounds about right. I measure my tire surface temperature with a laser IR thermometer and on a hot day they usually run 115 to 120.
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08-24-2015, 10:12 PM
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#3
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Rivet Master
1999 34' Excella
Currently Looking...
Hillsboro
, Texas
Join Date: Feb 2013
Posts: 6,406
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__________________
Peace and Blessings..
Channing
WBCCI# 30676
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08-24-2015, 10:20 PM
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#4
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Rivet Master
1995 25' Excella
xxxxx
, xxxxxx
Join Date: Apr 2015
Posts: 2,349
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I checked mine after an hour on the interstate a couple of weeks ago. It was also 80-85 degrees. My hottest tire was 110.
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08-24-2015, 10:31 PM
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#5
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3 Rivet Member
2010 28' Flying Cloud
Slidell
, Louisiana
Join Date: Nov 2009
Posts: 125
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I use TST stem mount system on 28ft FC with 80psi Michelin 16" LT E @65-70 mph. Tires always run 5-10 degrees above ambient in summer (90-100 degree temps) with tires on sunny side usually 3-4 degrees above shade side and psi gain of about 5 over cold. Front axle tire trmp is generally 2 degrees higher than back axle, side to side is same except for stated sun effect. Cold weather (30-40 degrees) temp increase about 5 degrees, really not all that much different.
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08-25-2015, 04:41 AM
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#6
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Rivet Master
2012 27' Flying Cloud
W
, New England
Join Date: Oct 2012
Posts: 7,402
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Replies 6 and 7 in this thread: http://www.airforums.com/forums/f438...nt-119498.html were posted by 2 of the forum's tire engineers when I asked a similar question. Good luck!
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08-25-2015, 07:07 AM
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#7
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Rivet Master
1979 31' Sovereign
Northeastern
, Kentucky
Join Date: Feb 2011
Posts: 627
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Tireman references his blog. Do you have a link to that?
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08-25-2015, 07:13 AM
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#8
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Rivet Master
2012 27' Flying Cloud
W
, New England
Join Date: Oct 2012
Posts: 7,402
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A/S Wheel Temperature Question
I'm not 100% sure but I think it might be this one: http://www.rvtiresafety.com/?m=1
Maybe Tireman9 can confirm?
(Edit - he emailed or PMed it to me once and I can't find it - I never remember to save sites as favorites - I just googled Tireman9 blog and this looked reasonable 😳
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08-25-2015, 07:29 AM
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#9
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Rivet Master
2006 23' Safari SE
Biloxi
, Mississippi
Join Date: Nov 2011
Posts: 8,278
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Monitoring with a TST system my tire internal temps usually go up 5 to 10 degrees. Ambient temps recently have been in the mid 90's.
__________________
MICHAEL
Do you know what a learning experience is? A learning experience is one of those things that says "You know that thing that you just did? Don't do that."
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08-25-2015, 09:54 AM
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#10
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4 Rivet Member
1976 29' Ambassador
Madison
, Officially SD but are traveling full time.
Join Date: Sep 2007
Posts: 335
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Thanks to everyone for the quick responses and links. When I was researching TPMS units there was a note somewhere in this forum about using the TPMS temperature readings to warn of a wheel bearing that is going bad. I cannot find a post that discusses what the temperature profile would look like if a wheel bearing was heating up. Any ideas?
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08-25-2015, 10:03 AM
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#11
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Rivet Master
1999 34' Excella
Currently Looking...
Hillsboro
, Texas
Join Date: Feb 2013
Posts: 6,406
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Quote:
Originally Posted by Eagle & Bear
Thanks to everyone for the quick responses and links. When I was researching TPMS units there was a note somewhere in this forum about using the TPMS temperature readings to warn of a wheel bearing that is going bad. I cannot find a post that discusses what the temperature profile would look like if a wheel bearing was heating up. Any ideas?
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A dragging brake can overheat the wheel... then the tire. Not just the hub which is usually a bearing/lube issue.
You should be able to hold your hand on the Hub if it is running properly.
Same with the wheel... but, start from the outside of the wheel near tire and work your way to the hub. If too hot, you will know it.
One quick check will be to jack up the trailer until tires are of the ground. Now, spin the tires... do you hear any noise? Rock the tire back and forth like trying to pull it off the trailer then push back.. how much does it move? too much slack/endplay can indicate a problem.
Since you are FT... keeping up with the status of each wheel is important...
Let us know what you find...
__________________
Peace and Blessings..
Channing
WBCCI# 30676
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08-25-2015, 12:07 PM
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#12
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Rivet Master
2014 31' Classic
2015 23' International
2013 25' FB International
Apache Junction
, Arizona
Join Date: Sep 2012
Posts: 6,215
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16" Michelins inflated to 75 psi and the two axles are supporting around 8,200 pounds. One tire around 1,950 pounds and another is around 2,150 pounds with the other two around 2,050 pounds. Pressure rises about 8 to 10 psi and temps about 10 to 15 above ambient.
__________________
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic w/ twin beds, 50 amp service, 1000 watt solar system, Centramatics, Tuson TPMS, 12" disc brakes, 16" tires & wheels
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08-25-2015, 12:34 PM
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#13
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2 Rivet Member
2013 27' FB Eddie Bauer
Salado
, Texas
Join Date: Jul 2015
Posts: 88
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Quote:
Originally Posted by switz
16" Michelins inflated to 75 psi and the two axles are supporting around 8,200 pounds. One tire around 1,950 pounds and another is around 2,150 pounds with the other two around 2,050 pounds. Pressure rises about 8 to 10 psi and temps about 10 to 15 above ambient.
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Switz: The sidewall recommended cold inflation pressure on my 16" Michelins reads "80 lbs." I note that you stated you used 75 lbs. Is there some reason you are running 5 lbs below the recommended cold pressure?
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08-25-2015, 12:53 PM
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#14
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Rivet Master
2014 31' Classic
2015 23' International
2013 25' FB International
Apache Junction
, Arizona
Join Date: Sep 2012
Posts: 6,215
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The operational temperatures and pressure gain are less at 75psi. Since on average the tires are supporting 2,100 pounds, I think 75 psi is the correct pressure for MY trailer. See pressure table below for the Michelin LT225/75R16/E LTX M/S2 tires. That pressure and load rating is still a 20% buffer above the actual payload.
80psi 2,680 (E)
75psi 2,560
70psi 2,440
65psi 2,335 (D)
60psi 2,190
55psi 2,060
50psi 1,940 (C)
45psi 1,790
I think the trailer rides a little easier as well.
__________________
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic w/ twin beds, 50 amp service, 1000 watt solar system, Centramatics, Tuson TPMS, 12" disc brakes, 16" tires & wheels
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08-25-2015, 02:11 PM
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#15
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Rivet Master
2007 28' International CCD
Springfield
, Missouri
Join Date: Apr 2011
Posts: 1,423
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I have run 68-70 Psi on my 28ft that has Michelin 16's for many thousands of miles and it works great.I would think you would run into sidewall flex situation below 60psi.
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