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Old 04-28-2014, 03:36 PM   #11
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Location: Charleston, SC
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Originally Posted by norty1 View Post
My tire pressure goes up directly proportional to ambient temp and speed. 10 to 20 psi.
Same with tire temp
To late to edit but I wanted to include another thing that can affect the temps and pressure on a warm tire in motion, The load on the tire.

2011 351RLTS Eagle, Mor/Ryde suspension & pin box
06 F350 Lariat PSD, SRW, LB, CC, EGR delete kit, 16K DrawTite hitch, Timbrens, TST TPMS

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Old 04-30-2014, 07:43 PM   #12
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Location: Oklahoma panhandle
Posts: 435
here is info I got from Goodyear

Special Trailer (“ST”) Tires
Goodyear Marathon trailer tires are widely used in a variety of towable
trailer applications and are designed and branded as “ST” (Special Trailer)
• Goodyear Marathon Special Trailer tires, with the “ST” size designation,
are speed rated at 65 MPH (105 km/h) under normal inflation and load
• This speed rating is based on Tire and Rim Association loads and
inflation pressures for ST trailer tires without a service description for
speeds up through 65 mph. (ref: TRA 2013 Year Book)
• If Goodyear tires, with the ST designation, are used at speeds between 66
and 75 mph (106 km/h and 120 km/h), we recommend the cold inflation
pressure be increased by 10 psi (70 kPa) above the recommended pressure
based on the trailer placard for normal inflation and load conditions. You
should also consult your trailer manufacturer’s Owner’s Manual for maximum
operating speed recommendations for the trailer.

o Increasing the inflation pressure by 10 psi (70 kPa) does not provide any
additional load carrying capacity.
o Do not exceed the maximum pressure for the wheel or the valve.
o If the maximum pressure for the wheel or valve prohibits the increase of
inflation pressure, then the 65 mph rated speed must observed as the
maximum speed.
o It may be necessary to dismount the tire from the wheel to determine the
maximum rated inflation for the wheel and valve. *

*Details about wheel and valve inspection:
a) If the rated (maximum allowable) inflation pressure is not visible on
the wheel, consult the wheel or trailer manufacturer.
b) Tubeless snap-in type valves, depending on the type valve, are rated for
a maximum inflation pressure of 65 or 80 psi for nominal 0.453” diameter
valve holes. If a higher cold inflation pressure is used, a clamp-in valve
such as TR416S valve (200 psi maximum inflation) must be installed.

Important trailer tire care information and load / inflation tables are
available on Goodyear’s Recreational Vehicle web site at
www.goodyear.com/rv. Encourage your trailer tire customers to use this
• Drivers should always obey posted speed limits and reduce speeds when
necessary based on vehicle, road, weather, or traffic conditions.

• Light Truck (“LT”) designated tires do not have the same load carrying
capacity as ST tires. If LT tires are used on trailer applications, the
inflation pressure and/or tire sizing will need to be adjusted to match the
load carrying requirements of the trailer.

• Cold inflation pressures should be checked every morning during trips and
monthly while in storage.

• Vehicles or trailers should not be overloaded. The tire information
placard, vehicle certification labels, and/or owner’s manual should be
checked for the maximum Gross Vehicle Weight Rating (GVWR) and the fully
loaded trailer must not exceed that weight.

• Vehicle speed, load and inflation pressures, all of which are within
control of the driver, are critical factors for the safe and enjoyable
operation of any vehicle.

Jennifer - Consumer Relations

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Old 05-05-2014, 10:20 AM   #13
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Location: Olsburg
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I just got back from putting 900 miles on our old camper delivering it to its new owners it had goodyear tires with max pressure of 50psi. I have the TST 507 flow thur they got up to 60 psi and the temp stayed around 80-90 the whole trip driving 60mph, I drove a little slower since I was delivering it and didnt want any problems. the temp stayed about 10 over the outside temp. My rear truck tires also went up about 10 psi from 80 to 90psi also. The real test will be this summer driving 3000 miles when its 100+ outside to see how hot the tires get.
2015 Eagle 34.5 BHTS FW
2012 Chevy 2500HD LTZ CC 4x4 DMAX
B&W Companion
TST 507 flow thru

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Old 05-15-2014, 11:58 PM   #14
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Location: Bonney Lake
Posts: 134
Originally Posted by mallardtuff View Post
Tim, I looked at the Goodyears, my concern there is that they are also made in China. Heck the way things are these days, maybe the same factory as the Tow Max. I've always had goodluck with Goodyears. I also am looking at Michelin's, my concern there is the size 235/85/16, the load rating for dual usage is only 2778/per tire. I scaled my rig today and the trailer axles weighed in at 9600. With the Michelin's, am I cutting it too close on load range? Also, it won't hurt anything changing from 235/80 to 235/85? I see there is about 1" difference in diameter. Kind of leaning towards the Marathons right now.
I'm dropping the trailer off Tuesday to have metal stems and balancing the tires, before heading to Talladega Thursday.
Your trailer is not setup with dual's .... that is reference to say a dully pickup truck.. Not saying the tires are ok, but you have a little more capacity
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Old 05-16-2014, 02:35 AM   #15
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Michelin's are made by goodyear, i found out when i purchased Michelin's for my car just a general info
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Old 05-16-2014, 12:45 PM   #16
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Originally Posted by roadrash View Post
Michelin's are made by goodyear, i found out when i purchased Michelin's for my car just a general info
How did you find that out? That don't sound right..
2013 33 RLDS
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Old 05-17-2014, 05:22 AM   #17
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Location: Maplesville, AL - Home Base
Posts: 2,524
I have the TST 507 system. My Designer originally had Marathon "E" rated tires on it and I replaced them with Good Year G614's a little over a year ago. I noticed the pressure and temp increase while traveling was less with the G614's. I'm talking about several points both pressure and temp. I'm sure the higher load rating tire that obviously flexes less would show this result. That's not saying the pressure and temp rise in the Marathon's was excessive or not to be expected, just less with the G614's.


2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof
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