Go Back   iRV2 Forums > TRAVEL TRAILER, 5th WHEEL & TRUCK CAMPER FORUMS > 5th Wheel Discussion
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 04-04-2014, 12:04 AM   #15
Senior Member
 
Join Date: Feb 2000
Location: On the road
Posts: 190
Inflate to the max on sidewall and forget all the rest.
__________________

__________________
'13 Ram Laramie 3500, Aisin auto,4:10, Reese adapter and 20K hitch, '10 HitchHiker 36LKRSB
Larry is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 04-04-2014, 12:38 AM   #16
Senior Member
 
drfife's Avatar
 
Excel Owners Club
Join Date: Jan 2001
Location: Dallas, Texas, USA
Posts: 2,123
Quote:
Originally Posted by Larry View Post
Inflate to the max on sidewall and forget all the rest.
I agree, run your trailer tires at the max cold psi stamped on the sidewall of the tire.
__________________

__________________
Russell
'13 Excel Winslow 34IKE

'16 GMC Sierra 3500HD
drfife is offline   Reply With Quote
Old 04-04-2014, 08:08 AM   #17
Senior Member
 
wingnut60's Avatar
 
Join Date: Aug 2004
Location: Wherever the Suites is
Posts: 2,982
Then for my learning give the maximum tonge weight of a 5th wheeler for law.
For travel trailers its 15% and minimum 10 % , I already learned.

jdatis,

There is a law on these tongue/pin weight percentages? Or are you referring to an industry-accepted standard?

Joe
__________________
'15 38RSSA Mobile Suites
'05 36TK3 Mobile Suites--retired but not forgotten
'17 F450--trying one more Ford
'09 F450--died, replaced with '10--retired
wingnut60 is offline   Reply With Quote
Old 04-06-2014, 04:56 PM   #18
Senior Member
 
Cypressloser's Avatar
 
Join Date: Sep 2013
Location: Alberta - East of the Rockies, West of the Rest
Posts: 648
Quote:
Originally Posted by Timay View Post
I pump mine up to what I think feels good, then hit the road - after 5 - 10 miles I stop and check the temp of the tires...if hot I give some more air, until they run cool.



Tim
Be careful, tire temperature can easily differ by 20 deg between south side and north side
__________________
Cypressloser is offline   Reply With Quote
Old 04-07-2014, 02:30 AM   #19
Senior Member
 
jadatis's Avatar
 
Join Date: Oct 2012
Posts: 247
Quote:
Originally Posted by wingnut60 View Post
Then for my learning give the maximum tonge weight of a 5th wheeler for law.
For travel trailers its 15% and minimum 10 % , I already learned.

jdatis,

There is a law on these tongue/pin weight percentages? Or are you referring to an industry-accepted standard?

Joe
I assumed it to be law that 10 to 15% , but it could be yust industry standard. Already googled for it and 5th wheeler saw 20% coming by.
So if anyone wants to make me wiser on it, its apreciated.
Though I gathered a lot of information in time, about tire-pressure and tires maximum load, I am not a tire-specialist. More a kind of hobby project, that has gotten out of hand a bit.

In Holland, where I live, to law minimum is 1% !!! and maximum 10 %.
That is that low because the axle of trailers is placed more to the front so we are even happy if we get 4% on the towbar. 5 to 7% is adviced for riding quality.
Most tow bars are maximum 50kg/110lbs to 100/220 lbs,so thats a lot less then in America.

To give you an idea , here a picture of the "caravan" as we call it , we had ( now without caravan or camper( motorhome)).
__________________
jadatis is offline   Reply With Quote
Old 04-07-2014, 03:17 AM   #20
Senior Member
 
jadatis's Avatar
 
Join Date: Oct 2012
Posts: 247
Quote:
Originally Posted by Rvmagoo View Post
The unit weight is 9500 lbs, but they not give me hitch weight, tire rating 2880@80psi. Only other info is 5000lbs per axle @ tire size 225/R7515 D rated @ 65psi. Max cargo weight 1441 lbs. will this help with your calculation using the e rated tires. I had no problems with the d rated other than they were weathered and starting to separate so was advised to change before we get a blowout. Your help is greatly appreciated as am a senior on the road.
Then I first added the 1441 lbs cargo weight to the 9500 lbs unit weight, to get 10941 wich I then asume to be the Gross Vehicle Weight Rating ( GWVR)
And combined GAWR ( A for Axle) of 10000 lbs, wich the 4 tires together must be able to bare to law in Europe and most likely also in America.
the 2880 lbs maximum load of the old D-loads is strangely the same as what I found for the E-load ( In Europe its rounded down to the lowest Loadindex-step so 117 /2833 lbs/1285 kg) But I substact even 6 LI steps to give the tire the same save deflection of an LT tire with maximum speed of 99m/160km/h. Seems high , but its only for comparing apples to apples.
Must do some work on the spreadsheet to work this into it , now it gives false warnings , so neglect the Red "these tires have not enaugh maximum load " and the speed warning of max 40 . To see if they are allowed the numbers on the sidewal count, so 4*2833= 11332 lbs so above the 10000 GAWR together.

Then it comes to an advice of 92 psi , wich is not allowed by TRA , so keep it at 90 psi. with this advice maximum reserve with long livetime 6 years if you protect against direct sunlight, because ST probably have less stuf in it to protect the tire against it, read of 3 years maximum livetime given for ST, and that is probably law that you have to keep at, so rules above my advice.

If you ever weigh , try to do it per wheel, and fully loaded.
And apart from the car the hich weight would be nice too.

Then I think it will prove to be much lower , because you had no problems with the old tires. Seached them back at a PDF of Goodyear I have and gave maximum load of 2540 lbs in D load.
So look again if all the data you gave, is right , especially of the tires, old and new . Mayby the sises are a bit different now.
__________________
jadatis is offline   Reply With Quote
Old 04-07-2014, 08:57 PM   #21
Senior Member
 
Ray,IN's Avatar
 
Join Date: Aug 2001
Location: North America somewhere
Posts: 13,709
One thing no-one mentioned yet is your rims. You said your trailer came with "D" rated tires and "E" tires were installed. What is the maximum air pressure rating for your rims? If they are aluminum, the max. pressure should be cast into the inside of a web. If they are steel it should be stamped inside the rim, covered by the tire. The lower of that, or tire sidewall max. is the limiting factor.
ST tires do not have a load/lnflation chart, the mfgrs, just say they should be operated at sidewall max. Carlisle Tire goes so far as to state, if their tires are operated at less than sidewall max.the warranty is void. This is because the RMA/Rubber Manufacturers Association, says over 90% of all tire failures are due to under-inflation/overloading.
If you do ever find a load/inflation chart for your tires, remember_ that is the minimum acceptable pressure for the corresponding load.
__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member,FMCA."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert the Constitution. "Abraham Lincoln"
Ray,IN is offline   Reply With Quote
Old 04-08-2014, 11:23 AM   #22
Registered User
 
Join Date: Jul 2013
Posts: 307
I personally don't know anyone who only goes 65 with trailer tires. Had original tires on my 07 trailer and made it to Nevada in Jan from ND before they started to separate and bubble and I was asking the tire guy if they had better quality higher speed rated ones than just 65 and he said no but everyone down here goes 80 with them including him and doesnt have problems, lol! I replaced with a 10 ply.
__________________
SultanGris is offline   Reply With Quote
Old 04-08-2014, 11:52 AM   #23
Senior Member
 
wingedone's Avatar
 
Join Date: Mar 2014
Posts: 187
I see them pass me going 70-75 also, while I am tooling along at 65. In fact, I saw a pickup with a popup on I-94 east of Bismarck pass me at about 75mph. Several miles later, I passed him, as he sat on the side of the road with a shredded tire. So sometimes, I see them twice.

I have seen that a couple of times. The other time was a 30' FW
__________________
2013 F350 6.7 DRW SC Lariat
2011 Brookstone 354TS
Swivelwheel 58DW w/1993 GL1500SE
wingedone is offline   Reply With Quote
Old 04-08-2014, 12:29 PM   #24
Registered User
 
Join Date: Jul 2013
Posts: 307
Quote:
Originally Posted by wingedone View Post
I see them pass me going 70-75 also, while I am tooling along at 65. In fact, I saw a pickup with a popup on I-94 east of Bismarck pass me at about 75mph. Several miles later, I passed him, as he sat on the side of the road with a shredded tire. So sometimes, I see them twice.

I have seen that a couple of times. The other time was a 30' FW
That could be from any number of issues and not related to speed. Likely age. I don't usually replace my tires til they start to bubble or go flat. I like getting my money's worth out of them, I have too many trailers to be buying new tires every couple years, haha!
__________________
SultanGris is offline   Reply With Quote
Old 04-08-2014, 03:24 PM   #25
Senior Member
 
wingedone's Avatar
 
Join Date: Mar 2014
Posts: 187
Believe what you want. I tend to believe what I read on the tire.
__________________
2013 F350 6.7 DRW SC Lariat
2011 Brookstone 354TS
Swivelwheel 58DW w/1993 GL1500SE
wingedone is offline   Reply With Quote
Old 04-08-2014, 05:40 PM   #26
Registered User
 
Join Date: Jul 2013
Posts: 307
To each their own, with the evidence I've seen doing it myself and the people I've talked to who exceed the rating I'm not concerned about it. Worst case scenario I have to buy a new tire. I don't buy the cheapest crap tire available though, I'd follow the speed rating a little closer if that's all I could get however.
__________________
SultanGris is offline   Reply With Quote
Old 04-08-2014, 09:08 PM   #27
Senior Member
 
wingedone's Avatar
 
Join Date: Mar 2014
Posts: 187
Quote:
Originally Posted by SultanGris View Post
Worst case scenario I have to buy a new tire.
I don't agree. The worse case scenario is it rips off a portion of your trailers siding as is shreds.

The very worse case scenario is someone reads this, believes they can just ignore manufacturers speed ratings on tires, blows one or more tires and careens into a school bus full of kids. Yeah, I think that pretty much covers the worse case scenario.
__________________
2013 F350 6.7 DRW SC Lariat
2011 Brookstone 354TS
Swivelwheel 58DW w/1993 GL1500SE
wingedone is offline   Reply With Quote
Old 04-09-2014, 01:44 AM   #28
Registered User
 
Join Date: Jul 2013
Posts: 307
Quote:
Originally Posted by wingedone View Post

I don't agree. The worse case scenario is it rips off a portion of your trailers siding as is shreds.

The very worse case scenario is someone reads this, believes they can just ignore manufacturers speed ratings on tires, blows one or more tires and careens into a school bus full of kids. Yeah, I think that pretty much covers the worse case scenario.
Good point about the camper and siding but the rest of my trailers are metal and nothing happens when they blow, it certainly doesn't cause your truck to go careening across the road, lol! Have you ever blew a tire on a trailer before? Its pretty uneventful. If you have tandems you better be paying attention or you might be buying a new rim too cause you didn't even notice it blew, haha!
__________________

__________________
SultanGris is offline   Reply With Quote
Reply

Tags
tire pressure



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Top 5 Purchases or Recommendations bjlakatos Travel Trailer Discussion 13 05-06-2014 10:30 PM
Wheel Air Pressure Rating F53 pre 1998 Brockx Ford Motorhome Chassis Forum 8 04-25-2014 04:20 PM
Tire Pressure Monitors JDT Excel Owner's Forum 7 01-15-2014 09:42 AM
Tire Pressure rogelling Entegra Owner's Forum 8 01-15-2014 03:54 AM
Tire Pressure LarPar2012 Class A Motorhome Discussions 15 10-30-2013 04:25 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 01:27 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.