WellShooter2
West Texas
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Joined: 03/20/2009
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Georgew48 wrote:I check mine at every stop with an infered gun and my 5th wheel tires run between 110 and 120 on hot summer days and the truck tires run 115 to 120 for rears and 110 to 115 on the front. I drive around 60-62MPH with the crusie on. I have never seen more than 5 degrees difference between the tires. I also check the wheel hubs and they run a few degrees cooler than the tires. I figure as long as the temps are consistant across all the tires then I am good. If I should see a large difference then I would suspect that I have a problem. I even had a truck driver tell me that I was the first RV'er that he had ever seen actually checking my lug nuts with a torque wrench and checking tire temps.
That's what I was asking about. I often lower my truck tire's pressure to around 40 psi when unhooked for several days. This gives a much smoother ride especially on those rub boarded forest roads. Then I air them back up to pull the 5er. Last time I misjudged a little and (put 75 in them when they were warm not hot) on travel morning I only had 60 psi in the rear tires. It was hot during the day and I pulled some steep grades. The drive tires got up to 150, which worried me some. They usually only run about 120. I intend to raise them up another 10 psi for the next haul. Was just curious what others thought. The trailer tires are not a concern, they are Ribs with 70-80 psi cold (depends on how cold). The truck tires are also Michelins
2008 2500HD D/A
2008 Keystone Challenger
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Grizzly128
N. Dakota
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Joined: 01/05/2007
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I read somewhere 180 is the red zone....mine run 110 to 125, as aforementioned, a big contrast on one tire or one hub would get my attention.
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valhalla360
No paticular place.
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Joined: 08/19/2009
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Make sure they are inflated to the proper level. If you want to check, look for variations in temperature over an absolute value. (hot asphalt can easily reach 150-160 on a sunny day).
Curvy roads are unlikely to have much impact as the relative amount of scrubing is minimal on the relatively large radii (as compared to pulling into a campground site) and any heat buildup will quickly disipate on the straightaways. Of course if you are driving the rig like an F1 that would be... that would just be scary.
Yes, blow outs happen, but statistically you probably aren't doing much to avoid them by checking temps if you are within weight limits and the tire and rig are otherwise in good shape and well maintained.
Tammy Mike & the Bilge Rat (AKA: Diego)
Ford F250 7.3L
1997 Sunnybrook 27' 5er
1995 Gemini Sail Catamaran 34'
Full Time spliting time between boat and 5er
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thomasmnile
Deltona, Fl.
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Joined: 05/14/2009
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WellShooter2 wrote:Ok, so temperature is a tire killer, and if your tires are under inflated the temperature will rise. This question is not about pressure. What is the maximum TEMPERATURE that your tires can attain before they are cooked.
I carry an infrared gun and occasionally check bearing and tire temperatures with it. I have seen drive tire temperatures as high as 150 degrees on a hot day on hilly terrain. Trailer tires usually run from 100 to 120 (the higher temp on the sunny side). Bearing hub temps usually run 10-20 above ambient.
Does anyone else have temperature data?
When I returned home on our maiden voyage from Kaleefornia with our new to us fifth wheel, I observed similar temps as yours on the tires and bearings in 90 degree plus heat running through Kaleefornia, Arizona, & New Mexico. I was driving nonstop between fuel refills so I figured that's probably my rig's normal "upper limit". Tires are Goodyear G614 RST's @ 110 psi, driving around 60 mph. Was amazed when stopping for half hour or so breaks how fast the tires cooled.
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stripit
Casa Grande, AZ
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Joined: 02/24/2004
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The TST Tire pressure monitor system starts the lowest alarm setting for temperature at 157 degrees. Had it go off on me once when a brake caliper stuck and everything at that area got hot enough to send off the alarm.
Stacey Frank
'04 Mobile Suites 36 TK3 #1341
'99 Int'l 4700 Lo Pro MDT
'08 Lexus 400H
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Gale Hawkins
Murray, KY
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stripit wrote:The TST Tire pressure monitor system starts the lowest alarm setting for temperature at 157 degrees. Had it go off on me once when a brake caliper stuck and everything at that area got hot enough to send off the alarm.
I wish it defaulted to 140 even because early is better than later in these cases. 
Like others I mentally note tire temps and PSI after about 30 minutes and then when I glance at the monitor I can call both for each tire before the computer gives the read out for the next tire as a game to keep me foucused. Hitting major pot holes and items laying in the road use to really stress me as if it damaged a tire to cause it to leak air. Now I was check that tire for the next few miles and if there is not change I put it out of my mind.
In a practical sense 157 is an early warning in that no lasting damage has occurred before you know to stop before your rig.
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Veebyes
Bermuda & Maryland
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I had them seriously scare me once.
Sequoia Nat Park to Vegas. Air temp over 100 & highway speeds all day. Tires & rims were very hot to touch. I was very happy to arrive without incident.
Boat: 32' 1996 Albin 32+2, single Cummins 315hp
40+ night per year overnighter
2007 Alpenlite 34RLR
2006 Chevy 3500 LT, CC,LB 6.6L Diesel
Ham Radio: VP9KL, IRLP node 7995
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AlbertG001
Calif.
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Joined: 07/23/2010
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I also use a hand held infrared to check my tire temp and to check my wheel bearing temp. I do a complete walk around on my TV and fiver check tires for air, temp on wheel bearings and tires, excessive heat on bearings means no lubrication metal to metal contact just a precaution just takes a few minutes to do. My East coast trip last month I checked my air on the trailer tires had one tire low 20 pounds of air noticed a balloon on the sidewall a nail went through the threads and started to puncture the sidewall. Luckily I was at RV site 1/4 mile away was a tire shop. You can pick up one of these hand held infrared units on Ebay for $30-$50.00 or your local Harbor freight. Albert.
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AntiqFreq
USA
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Joined: 03/20/2003
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We just went from T. Roosevelt Natl Park down to Custer SP in South Dakota & it was 98 degrees out. We stopped for fuel 2 times & I shot the ray gun at the tires.
Our temps on the passenger side (west side) were 102 to 105 degrees on ALL the tires.
Our temps on the driver side (east side-where the sun was hottest) were 120-130 degrees.
I was surprised as I had never seen that much of a difference and I check our tires probably every other time we stop for fuel; but it was so hot I decided to check it both times.
Our tires are MAXXIS and about 2 - 1/2 years old at this point and about 25,000 miles on them!
Jo
2007 Keystone Cougar, 291 RLS
2003 Ford F250, 7.3L, Lariat, CC, SB, 4x4
Isspro Gauges-overhead mount, 14K Pullrite Superglide
Firestone RideRite airbags & pressure gauge
Two Honda eu2000i generators, parallel kit
Bell Morningstar Canoe, bent shaft paddles
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stripit
Casa Grande, AZ
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Joined: 02/24/2004
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Problem is you have to be stopped to use this tool as a TPMS will do the same thing while your rolling down the road. A lot can happen from that last stop where everything checked or looked fine.
AlbertG001 wrote:I also use a hand held infrared to check my tire temp and to check my wheel bearing temp. I do a complete walk around on my TV and fiver check tires for air, temp on wheel bearings and tires, excessive heat on bearings means no lubrication metal to metal contact just a precaution just takes a few minutes to do. My East coast trip last month I checked my air on the trailer tires had one tire low 20 pounds of air noticed a balloon on the sidewall a nail went through the threads and started to puncture the sidewall. Luckily I was at RV site 1/4 mile away was a tire shop. You can pick up one of these hand held infrared units on Ebay for $30-$50.00 or your local Harbor freight. Albert.
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