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09-13-2018, 08:11 PM
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#1
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Member
Join Date: Aug 2018
Posts: 41
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What are you running for tire pressure?
We have a new 2019 250RDS Titanium which loaded weighs around 9000lbs.
Our tires are the Goodyear ST235/80R16 E tires. According to Goodyears tire inflation chart the inflation could be as low as 55 psi to carry the load, but I am wondering what others with similar weight and tires have found to run comfortably?
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09-13-2018, 08:48 PM
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#2
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,903
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ST tires in a tandem setting endure extreme sidewall stress. That's the reason most ST tire mfgrs. recommend inflating to sidewall maximum, and to avoid standard pickup tires that have lighter sidewalls.
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2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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09-13-2018, 09:41 PM
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#3
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Senior Member
Outdoors RV Owners Club
Join Date: May 2012
Posts: 1,663
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What does the inflation placard say on the side of the trailer?
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2008 F450, 2016 Outdoors RV Glacier Peak 26 RKS
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09-14-2018, 07:10 AM
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#4
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Senior Member
Outdoors RV Owners Club
Join Date: Dec 2014
Location: Ontario Canada
Posts: 1,940
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I fill my 15" ST-Es to 80psi.
That's the max I believe.
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2014 Timber Ridge 240RKS, 70K miles
690W Rooftop + 340W Portable Solar, 215Ah GC2s@24V
2016 Ram 2500 CTD 4x4 RegCab SLT, 10-11 mpgUS tow
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09-14-2018, 07:22 AM
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#5
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Member
Join Date: Jun 2017
Location: Abbeville LA
Posts: 74
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I to asking this question. Yesterday I upgraded from Marathon 235 -15 D to the E version Endurance. Max tire now 80 vs 65 - My 22RB Creekside weighs max 7200 when fully loaded for very long trip-I left the dealer with 70 psi but would like more input/opinions as the question OP has asked.
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09-14-2018, 08:21 AM
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#6
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Senior Member
Forest River Owners Club Ford Super Duty Owner
Join Date: Jul 2012
Location: So Calif
Posts: 3,533
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I run my goody years at 80psi....sidewall states that. Placard states that.
Never run less.....heat will destroy your tires and blowout.
Unless you tow for thousands of miles, your tires will time out before they wear out.
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09-14-2018, 10:03 AM
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#7
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Senior Member
Outdoors RV Owners Club
Join Date: Dec 2014
Location: Nowhere, now here. Freedom!
Posts: 4,602
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I run max sidewall pressure on ST tires on multiple axle rigs to help reduce the effects of interply shear.
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09-14-2018, 01:44 PM
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#8
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Registered User
Outdoors RV Owners Club
Join Date: Jan 2014
Location: La Verne, Calif
Posts: 3,649
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80 PSI cold. The tire mfg's build them to take higher PSI's when they heat up. I run mine very close to 80 cold.
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09-22-2018, 01:01 AM
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#9
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Member
Outdoors RV Owners Club
Join Date: Sep 2017
Location: Box Elder SD
Posts: 62
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E's = 80 lb psi
Quote:
Originally Posted by Highway 4x4
80 PSI cold. The tire mfg's build them to take higher PSI's when they heat up. I run mine very close to 80 cold.
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Check the sidewall of the tire, E rated tires max pressure listed at 80 psi. That's what I also use with no problems on a Creekside 20FQ.
James
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T- 2020 Outdoors RV 280RKS;
TV- 2014 RAM 2500 Big Horn TD 4x4;
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09-22-2018, 01:40 AM
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#10
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Senior Member
Outdoors RV Owners Club
Join Date: Oct 2003
Location: Hillsboro, OR, USA
Posts: 1,293
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Just had a friend have a major blow out - but the tire was not the root cause of the blow out - it was the valve stem. Yep, the tires were inflated to the recommended 80PSI but the stems were only rated for 60 PSI. This was a factory set up - so they are now on the hook to fix the trailer and make things right in terms of the remaining valve stems. This was also a toy hauler and the tire that blew was next to the fuel tank for the toys. He was lucky that the only damage was contained to the hubs, brakes, and axles.
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2017 Chevy 2500HD LTZ DuraMax Diesel Silver Ice Metallic
2017 Outdoors RV Timber Ridge 25RDS Mountain Series 4X Off Road Suspension Pkg
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09-22-2018, 05:43 AM
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#11
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Senior Member
Outdoors RV Owners Club
Join Date: Dec 2014
Location: Ontario Canada
Posts: 1,940
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Quote:
Originally Posted by Randy the sly old fox
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Yep, the tires were inflated to the recommended 80PSI but the stems were only rated for 60 PSI.
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Interesting.
Am now especially glad that we upgraded to steel valve stems when we went from 65 to 80psi tires (at the time I just did it for the TPMS).
__________________
2014 Timber Ridge 240RKS, 70K miles
690W Rooftop + 340W Portable Solar, 215Ah GC2s@24V
2016 Ram 2500 CTD 4x4 RegCab SLT, 10-11 mpgUS tow
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09-22-2018, 12:09 PM
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#12
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Registered User
Outdoors RV Owners Club
Join Date: Dec 2011
Location: Kamloops BC Canada
Posts: 1,399
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Maxxis 8008 225/75R15 10ply 80 psi cold E rated
Upgraded from the D rated GoodYear Marathon.
Irregardless of country of tire Manufacturing check tire pressure and tire wear very very closely.
The little piece of rubber is the only thing between your trailer and the road.
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09-22-2018, 12:28 PM
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#13
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Senior Member
Join Date: Jul 2017
Posts: 2,582
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I upgraded from the OEM Goodyears to Carlisle Radial HD but stayed with the original tire size, load range, and recommended tire pressure found on the placard. I found it somewhat interesting the tire shop just automatically installed steel valve stems, the originals were rubber.
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09-23-2018, 07:34 AM
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#14
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Member
Join Date: Aug 2018
Posts: 41
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Thank you for the input everyone. When I first noticed the tire pressure on the side of my tires listed at "Max 80 PSI" I assumed that the inflation could not be higher than that, not to necessarily run at that.
I did inflate to 80 PSI cold and installed Fords TPMS trailer monitor on my King Ranch and headed cross country from Bend Oregon, headed for Nashville, (but stopping at most spots in between to play...) currently we are in the South Dakota Badlands area and the TT (250RDS Titanium) has pulled amazingly well.
Watching the TPMS the tires inflate to about 92 psi when they are hot, though the outside temps have only climbed to the low 80's.
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