Tire pressures - Page 2 - Fiberglass RV


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-16-2011, 08:38 AM   #15
Member
 
Mike T's Avatar
 
Name: Mike
Trailer: Newby CT-13, 84' U-Haul Owner
Wisconsin
Posts: 38
Registry
How do you find out the proper pressure? I just bought my trailer and have only towed it once. It has no sticker to tell me the 'proper' tire inflation rate. Trial and error till I get it right seems to be a really 'slow school.' Especially since I won't tow it again till next year sometime. Any suggestions to find out?
__________________

__________________
Mike T is offline   Reply With Quote
Old 10-16-2011, 09:10 AM   #16
Senior Member
 
honda03842's Avatar
 
Name: Norm and Ginny
Trailer: Scamp 16
Florida
Posts: 7,300
Tire Pressure

Quote:
Originally Posted by Mike T View Post
How do you find out the proper pressure? I just bought my trailer and have only towed it once. It has no sticker to tell me the 'proper' tire inflation rate. Trial and error till I get it right seems to be a really 'slow school.' Especially since I won't tow it again till next year sometime. Any suggestions to find out?
You have a trailer that probably weighs about 1500 - 1700 pounds. That means each tire has to support about 850 pounds. If you look on the sides of your tires it will tell you the maximum cold pressure and the load the tires can carry at that pressure.

I would set the pressure below the maximum as long as the tires can support 850 pounds at that pressure. Assuming the maximum pressure allowed is 50 pounds, I would set it to 40 or 45 psi.

Also checkout the brand of tires and size and you can look up the inflation tables for these tires. It will tell you how much each tire can support at a specific pressure. The following table is for my Goodyear Marathons ; I'm sure there's a similar table for your tires..

http://www.goodyearrvtires.com/pdfs/rv_inflation.pdf

As well and equally important I increase the pressure in the tires of my tow vehicle. My tow vehicle tire pressure is normally 26 psi. I increase the front tires to 32 and the rear to 39.

I don't know your tow vehicle however I would increase the trie pressure because it increases the stiffness of the tow vehicles sidewalls and makes it more difficult for the trailer to push the tow vehicle around.

Of course driving slower always helps. We don't go faster than 60mph. Remember that trailer tires have a maximum speed of 65 mph.

Hope this helps and glad to answer any specific questions.
__________________

__________________
Norm and Ginny

2014 Honda Odyssey
1991 Scamp 16
honda03842 is offline   Reply With Quote
Old 10-16-2011, 10:36 AM   #17
Senior Member
 
floyd's Avatar
 
Name: Floyd
Trailer: 2004 13 ft Scamp Custom Deluxe
IllAnnoy
Posts: 6,050
Registry
Keep in mind that the pressures on the chart are LIMITS, below which, if used, it is recommended that the tire be dismounted for inspection or discarded.

Here's more information, read it carefully before your next trip and then make up your own mind.
(pay particular attention to the note under the chart...

http://www.carlisletire.com/product_...are_safety.pdf
__________________
floyd is offline   Reply With Quote
Old 10-16-2011, 02:19 PM   #18
Senior Member
 
Name: Darwin
Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
Posts: 3,030
Send a message via Yahoo to Darwin Maring
Floyd: Thanks for the info. I recommend that the site adds your Carlisletire site information to this site information page.
__________________
Darwin Maring is offline   Reply With Quote
Old 10-16-2011, 03:08 PM   #19
Senior Member
 
Name: Jesse
Trailer: 1984 Scamp 13'
Maryland
Posts: 818
Quote:
Originally Posted by Darwin Maring
Floyd: Thanks for the info. I recommend that the site adds your Carlisletire site information to this site information page.
Hopefully, the Goodyear tire information will be there, too. A lot of us have Goodyear tires, and it is great to have this king of info from the people who actually design and manufacture them.
__________________
-Jesse
SOLD! - 1984 Scamp 13 in Maryland.
mcbrew is offline   Reply With Quote
Old 10-16-2011, 08:57 PM   #20
Senior Member
 
floyd's Avatar
 
Name: Floyd
Trailer: 2004 13 ft Scamp Custom Deluxe
IllAnnoy
Posts: 6,050
Registry
It is irresponsible to recommend adjusting trailer tire pressures in order to constantly run the tires at their load limits,as was done earlier in this thread. Even if the chart from the Goodyear site is used without caveats as has been advocated.

Carl Sagen once said ... "being absolutely convinced does not preclude one from from being profoundly in error" ( He now knows that he was right, at least once)

Since all the charts are the same I ask that each of you examine the one of your choice, and consider your conclusions in light of the heading.

http://www.goodyearrvtires.com/pdfs/rv_inflation.pdf

http://www.carlisletire.com/product_care/proper_tire_care_safety.pdf

I apologise for being once more inexorably drawn to respond to that which clearly has no merit.
__________________
floyd is offline   Reply With Quote
Old 10-16-2011, 09:04 PM   #21
Senior Member
 
The Minimalist's Avatar
 
Name: Clif
Trailer: 08 Weiscraft Little Joe 14 Subaru Outback 2.5i CVT
Louisiana
Posts: 724
Registry
The Carlisle info has been there for some time folks.

Regarding any manufacturer who says they will not warranty tires unless they are run at max pressure; my opinion is that this is just a dodge. If you run at max pressure, as indicated on the sidewall, and wear out the center tread, they are going to say it was overinflated.........and it was. Bring it in with both outer treads gone and they will say it was under inflated.......and it was.

The statements regarding max pressure and warranty are ambiguous at best. Are they talking about absolute max pressure as indicated on the sidewall, or the max pressure for the load range?

What we are looking for is a pressure that will give us the most effective, read even, contact of the tire with the road over the full width of the tread. Too much air, center line wear; too little, sidewall wear. We're looking for the Goldilocks solution............"Ah! This one is just right."

Using the charts from the tire manufacturer and a true weight for your trailer, determine your true load and inflate to match that load range. Then carry a tread depth gauge and a IR thermometer. Tread depth and tire temp, both tread and side wall will tell the story over time.

As much as we would like it, there is no one size fits all answer. Even a trailer manufacturers recommendation is only a suggestion based on expected load. Some of use travel heavier than others; some lighter.

Just my 2 cents. Anybody got $4.98 I could borrow? I need a cup of coffee.

Clif
__________________
The Minimalist is online now   Reply With Quote
Old 10-17-2011, 11:50 AM   #22
Senior Member
 
Steve Hilby's Avatar
 
Trailer: Compact Jr
Posts: 259
Well, after reading all your inputs I'm still confused. But I'm confused at a higher level.

I think what I'm going to do is check the tire size against the Carlisle chart (or an equivalent chart for whatever tires she has on the trailer) and inflate to slightly above the pressure corresponding to her trailer weight.
__________________
Steve Hilby is offline   Reply With Quote
Old 10-17-2011, 11:58 AM   #23
Senior Member
 
Name: Jesse
Trailer: 1984 Scamp 13'
Maryland
Posts: 818
I'm wondering what the downside is to running at or slightly above the pressure that the Goodyear chart lists for my Scamp's weight. It runs at the right temperature, even on HOT days and long distances. The tread is wearing evenly. Bounce is less than it was at max sidewall pressure.

I have no relationship with Carlisle tire. They did not manufacture my tire, or sell it to me, or manufacture my trailer. Goodyear and Scamp both tell me to run at 15 PSI. I run at 20 PSI.

Please tell me exactly what harm is being done, not just that I am wrong and think I am right. The same could be said of anyone here -- including Carlisle tire.
__________________
-Jesse
SOLD! - 1984 Scamp 13 in Maryland.
mcbrew is offline   Reply With Quote
Old 10-17-2011, 01:15 PM   #24
Senior Member
 
Perry J's Avatar
 
Name: John
Trailer: 16' Casita
California
Posts: 975
Send a message via AIM to Perry J Send a message via Yahoo to Perry J
The best indicator of a properly inflated tire is even tire wear.
According to my PU owners manuel I over inflate the tires on my PU by 4 pounds hoping to improve my fuel mileage.
I doubt you're causing any harm.
John
__________________

__________________
Perry J is offline   Reply With Quote
Reply


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
Tire Size Pat C Problem Solving | Owners Helping Owners 2 04-08-2010 10:46 PM
spare tire Vicki A. General Chat 9 03-09-2010 01:00 AM
what new tire curtis c Towing, Hitching, Axles and Running Gear 5 04-28-2009 03:02 AM
tire clearance.. Christine V Towing, Hitching, Axles and Running Gear 1 08-17-2007 04:58 PM
More Tire Talk LauraW Towing, Hitching, Axles and Running Gear 16 06-08-2006 05:31 PM

» Upcoming Events
No events scheduled in
the next 465 days.
» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:48 PM.


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