Jayco RV Owners Forum
 


Reply
 
Thread Tools Display Modes
 
Old 03-02-2015, 07:29 AM   #11
Senior Member
 
Paintinfool3's Avatar
 
Join Date: Apr 2014
Location: Fort Wayne
Posts: 1,272
I think the tires when towing should be inflated to max sidewall cold pressure . I didnt know about the 10 over on towmaxes but i will be running 60 in mine to try to keep them running cooler as at 50 they seem low looking to me. From what i have read tire pressure on wheels is limited to what the valve stem can handle. . With my tt pushing the limits of the weight on the tires jayco installs i might go to 10 ply maxxis as soon as i can that way i can run 75 psi at least ... i put lt tires on my other tt and what a difference in how it rolled down the road with the 80 psi instead of 50 ... night and day pulling it
__________________

__________________
2011 F250 King Ranch Crew Cab Diesel , 2015 Jayco Eagle 338 rets
Paintinfool3 is offline   Reply With Quote
Old 03-02-2015, 08:29 AM   #12
Senior Member
 
oldmanAZ's Avatar
 
Join Date: Dec 2014
Location: AZ
Posts: 7,022
Quote:
Originally Posted by bucko View Post
Not sure about this....I was always told to fill the tires of the tow vehicle to the recommended pressure that is listed on the drivers door jamb, and NOT the maximum tire pressure that is listed on the tire sidewall.

Again, this is the vehicle doing the towing, and not the TT.
If you don't have any sway when towing, then using lower tire pressures would be fine. On the other hand, if you want to try to reduce sway, try increasing the tire pressure to the tire's maximum. That reduces sidewall flex and that may reduce some or a lot of the sway. It's certainly an easy and cheap thing to try.

There have been folks on this site that have gone to higher load range tires with higher inflation pressures (of course consistent with the tire rim/wheel psi rating). They said that change alone reduced their sway A LOT.

Of course the above is just my opinion and experience. Use the 'search' function on this site and see what others have done to reduce or eliminate sway and see what you think.
__________________

oldmanAZ is online now   Reply With Quote
Old 03-02-2015, 09:11 AM   #13
Senior Member
 
Join Date: Sep 2013
Location: South Texas
Posts: 4,190
When I purchased my trailer, all my tires were at least 10 lbs low, and it was like dragging an elephant. After I referenced the yellow placard, and the sidewall and inflated my TT tires properly (and I check them frequently) it was a whole different towing experience.

As far as inflating the TV tires to max sidewall, here are some notes:
1) For LT tires, they reach their maximum load capacity at max inflation and lower inflation equals lower load carrying capacity. For most 3/4 and 1 ton trucks, you'll see the recommended pressure in the rear is 80 PSI and front is 60 PSI, but most owners only inflate to 80 when they are operating under loaded conditions because lower pressure results in a more comfortable ride when unloaded.
2) For P-rated tires (like those found on most 1/2 ton trucks) their maximum load carrying capacity is reached at lower than max sidewall pressures, and there's a 10% penalty on load capacity for having passenger tires on a truck. So increasing the pressure beyond that recommended will not increase load carrying capacity, but may enhance performance at upper load ranges by not allowing the sidewall to flex as much.

Personally, I tow with my rear tires (P-rated) at max cold inflation per sidewall. However, I don't really notice much difference when towing.
__________________


2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)

Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!
Camper_bob is offline   Reply With Quote
Old 03-02-2015, 09:54 AM   #14
Senior Member
 
oldmanAZ's Avatar
 
Join Date: Dec 2014
Location: AZ
Posts: 7,022
Quote:
Originally Posted by Camper_bob View Post
When I purchased my trailer, all my tires were at least 10 lbs low, and it was like dragging an elephant. After I referenced the yellow placard, and the sidewall and inflated my TT tires properly (and I check them frequently) it was a whole different towing experience.

As far as inflating the TV tires to max sidewall, here are some notes:
1) For LT tires, they reach their maximum load capacity at max inflation and lower inflation equals lower load carrying capacity. For most 3/4 and 1 ton trucks, you'll see the recommended pressure in the rear is 80 PSI and front is 60 PSI, but most owners only inflate to 80 when they are operating under loaded conditions because lower pressure results in a more comfortable ride when unloaded.
2) For P-rated tires (like those found on most 1/2 ton trucks) their maximum load carrying capacity is reached at lower than max sidewall pressures, and there's a 10% penalty on load capacity for having passenger tires on a truck. So increasing the pressure beyond that recommended will not increase load carrying capacity, but may enhance performance at upper load ranges by not allowing the sidewall to flex as much.

Personally, I tow with my rear tires (P-rated) at max cold inflation per sidewall. However, I don't really notice much difference when towing.
Thank you, Camper_bob.

I did not know about the P-rated tires and their inflation vs load carrying ability. For those with P-rated tires that is important information.

I have LT tires on my F-350; rears at 80psi, front at 73psi for best load carrying, tire wear, and handling.
__________________
Sherm & Terry w/rescues Eydie (min Schnauzer) Steve RIP (std Poodle)
2015 Jay Flight 27RLS (Camped: 102 nights '15, 90 nights '16, 70 nights '17 so far)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.
oldmanAZ is online now   Reply With Quote
Old 03-02-2015, 06:53 PM   #15
Senior Member
 
Nighthawk 96's Avatar
 
Join Date: Apr 2011
Location: Columbia SC
Posts: 571
I have P-rated tires with max psi of 51 lbs per sidewall. Run them at 44 psi towing and fronts at 32 psi, as the WD hitch has returned the front end to its unloaded weight.

Be careful with your TT tire pressure. My wheels are only rate to 60 lbs. I run my tires at 50 lbs cold.
__________________
2012 Toyota Tundra 5.7 Litre DoubleCab
6 speed, 4.30 Limited Slip, Tow Package
2013 Jayco White Hawk 27DSRL
2010 Jayco JayFlight 26BH sold
Yamaha EF2000is Generators (2)
1996 Honda CB750 Nighthawk
Nighthawk 96 is offline   Reply With Quote
Old 03-02-2015, 07:39 PM   #16
Junior Member
 
Join Date: Jan 2015
Location: Westland
Posts: 21
Where do you find the max rim pressure? I know the tires have it on the side wall but the rims/wheels itself?
rbrent is offline   Reply With Quote
Old 03-03-2015, 04:54 AM   #17
Junior Member
 
Join Date: Mar 2015
Location: Berkel-Enschot
Posts: 17
Registed to this forum to react .
Call myself tire-pressure specialist nowadays, story began end 2007 when I got hold of the European Formula sheet from standards manual of ETRTO ( America TRA ) and went running with it.
Gathered a lot of information about tires maximum load and needed pressure.
Now google dayly for it to see if my gathered knowledge can be of use.

Here also the discussion about ST tires .
Made a topic on RV forum for comparing and by that you can get wiser why "maximum pressure" is adviced .

RV.Net Open Roads Forum: How to compare tires for replacement and needed pressure

But to give a start , what most think is maximum pressure is in fact the pressure needed for the maximum load up to maximum speed of tire or if lower 160km/99m/h or for ST 65m/104km/h.
Also called AT-pressure, maxloadpressure, referencef-pressure ( in the formula sheet i got) .
This is not the maximum pressure of a tire , for ST tire makers mostly allow 10 psi extra for higher speed or riding quality.
But you are allowed to drive for instance only 50m/h when filled with adviced pressure for 75m/h. Better for the tires so lesser deflection and lesser heat production.

Wont introduce myself in a seperate topic, dont have an RV anymore, and only react on tire related questions.

Greatings from a Dutch Pigheaded self declared tire-pressure specialist.
( ja dat is ) Peter ( from a dutch name song part of text Yeah thats Peter translated)
__________________

jadatis is offline   Reply With Quote
Reply

Thread Tools
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


» Virginia State Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 09:27 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.