Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
Jayco RV Owners Forum
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 07-13-2016, 09:35 AM   #1
Member
 
Join Date: Feb 2016
Location: Bradenton
Posts: 77
Tire pressure

I replaced my Tundra's stock tire with high load 10 ply Michelins.
My dealership only fills the tire to the sticker on the truck (32 psi). Tire is rated 65 psi. I asked to inflate to 50 psi. Service advisor said if I inflate to 50 psi it will cause the center tread to wear out faster. Anyone know if this is true?
Currently tire pressure looks low. What to you run your tires at compared to door specs/tire specs?
ParrishCamper is offline   Reply With Quote
Old 07-13-2016, 09:54 AM   #2
Senior Member
 
Jagiven's Avatar
 
Join Date: May 2012
Location: Minnesota
Posts: 9,740
Manufactures put the sticker on the door, to optimize ride, and fuel economy.

If your tires are rated for 65 psi, you should have no issues running at a higher pressure.

I installed new tires on my TV 18 months ago. For my TV and HTT combo, I found I have increased my rear tire pressure by 10 psi, in the rear, and 5 psi in the front over factory recommendations. For me this gives me a nice ride. I am still below the maximum tire pressure rating. I have seen NO signs of uneven tire wear.
__________________

2012 Jayco X23B
2020 Ram Laramie 3500 SRW Air ride 50Gal fuel tank.
2007 Dodge Dakota Quad Cab (sold)
Equal-I-zer 4-Point Sway Control
Jagiven is offline   Reply With Quote
Old 07-13-2016, 02:07 PM   #3
Member
 
Join Date: Mar 2015
Location: Berkel-Enschot
Posts: 88
Tirepressure advice is all about
1. load on seperate tires /maximum load of tire.
2. The speed you wont go over for even a minute.

I am able to calculate it for you but need some data for it.

From car best determined seperate wheel weights, second best Axle weights, but in lack of that the Emty weigt of car, Maximum permissable Axle Weights\\ and Vehicle weight ( Shortened MPAW/MPVW amerikan GAWR/GVWR for Gross Axle/Vehicle Weight Rating), and the way you load it with persons and gargo.

Then this maximum speed you use for the situation and wont go over for even a minute.

A thing I did not mention yet is the Camber angle on mostly rear tires if above 2 degr.

Then from tires
1. the maximum load or loadindex.

2.Kind of tire to determine the pressure needed for maximum load up to max speed of tire ( or if lower 99m/h) called reference-pressure/ AT-pressure/maxloadpressure . This is not the maximum cold pressure of a tire, wich are only given on Standard load and XL/reinforced/Extraload tires.

Your normal tires where probably Standard load with At-pressure of 35 psi and AT of your new tires is 65 psi ( your read probably from tire something like this "maximum load xxxx lbs AT 65 psi ( cold)").
This makes it a 8 plyrated/D-load tire , and not a 10 PR/E-load.

Anyway , a tire with higher At-pressure needs a bit higher pressure for the same load on it, then a tire with lower AT-pressure.

So your 32 advice standard , has to be highened up a bit, but let me calculate.

Greatings from a Dutch Pigheaded Self-declared Tirepressure-specialist
jadatis is offline   Reply With Quote
Old 07-13-2016, 02:14 PM   #4
Senior Member
 
Join Date: Aug 2015
Location: Albany, OR
Posts: 692
Quote:
Originally Posted by ParrishCamper View Post
I replaced my Tundra's stock tire with high load 10 ply Michelins.
My dealership only fills the tire to the sticker on the truck (32 psi). Tire is rated 65 psi. I asked to inflate to 50 psi. Service advisor said if I inflate to 50 psi it will cause the center tread to wear out faster. Anyone know if this is true?
Currently tire pressure looks low. What to you run your tires at compared to door specs/tire specs?
I would assume that the pressure listed on the sticker of the vehicle is the pressure of the OEM tires. Since you no longer have OEM tires I would use the pressure from the new tire's sidewall.
__________________

2015 Jayco 27RLS
2015 Ford F250 6.7PSD
DanNJanice is offline   Reply With Quote
Old 07-13-2016, 02:56 PM   #5
Senior Member
 
Join Date: Sep 2013
Location: .
Posts: 580
The vehicle manufactures put lots of R&D hours into determining the optimum tire pressure for a vehicle. The weight of the vehicle, the quality of the ride, the handling, and the fuel mileage are all considered.

On a pickup, the recommended tire pressure for the rear assumes the truck is loaded to capacity, so you are actually better off running a lower pressure when the vehicle is unloaded.

Running unnecessarily high air pressures will compromise the vehicle's handling and can cause you to lose control.

My recommendation is to follow the manufacturers suggested air pressures. If you've upgraded the tires to a higher load range, then you have the ability to raise the air pressure when you pull the trailer, and then return the air pressure to normal when the trailer is unhitched.
etex211 is offline   Reply With Quote
Old 07-13-2016, 05:46 PM   #6
Member
 
Join Date: Feb 2016
Location: Bradenton
Posts: 77
My new tires are Michelin Defenders LTX Load Range E.
Max load is 3415 at 80 psi cold
I don't know the truck weigh. 2013 Toyota Tundra.
Tongue weight of camper is 850lbs.
I know we are close to our load capacity which is why we opted for better tires.
Need to hit the scales now that we have camper out a couple of times.
ParrishCamper is offline   Reply With Quote
Old 07-14-2016, 08:05 AM   #7
Senior Member
 
Seann45's Avatar
 
Join Date: Jun 2010
Location: Saskatoon Sask Canada
Posts: 10,714
at 32 psi I will bet his truck originally came with P rated tires...
Just go to an air compressor and pump up your tires to the pressure listed on the sidewall and FORGET THE DEALER...
__________________
Seann
2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 900watts of solar, Lithium batteries (400amp hour), 2000 watt (4000 surge) whole house inverter.
145days boondockinig in2023 2022/151 2021[/COLOR]
93/2020,157/2019219/2018 206/2017,215/2016, 211/2015, 196/14, 247/13, 193/12

Seann45 is offline   Reply With Quote
Old 07-14-2016, 08:38 AM   #8
Senior Member
 
Join Date: Aug 2013
Location: NC
Posts: 974
IMHO, 32psi is not sufficient pressure for an E rated tire. The yellow sticker has already been done by my changing the tire rating. You can't follow part of the sticker, it's a system. But also IMHO you did the right thing by upgrading the tires.
__________________
No man has a good enough memory to be a successful liar. Abraham Lincoln

2016 36FBTS Pinnacle
2016 F350, 6.7, 4x4, DRW, long bed
B & W Companion 5th wheel Hitch
eldermike is offline   Reply With Quote
Old 07-14-2016, 10:20 AM   #9
Senior Member
 
Join Date: Sep 2013
Location: .
Posts: 580
Quote:
Originally Posted by eldermike View Post
IMHO, 32psi is not sufficient pressure for an E rated tire. The yellow sticker has already been done by my changing the tire rating. You can't follow part of the sticker, it's a system. But also IMHO you did the right thing by upgrading the tires.

I just removed a set of load range E Firestones from my half ton truck. The recommended tire pressure for that truck is 35 psi for both front and rear. Since that truck is my daily driver and usually driven around empty, I routinely ran 35 psi in the front and 28-30 psi in the rear. I aired up the tires any time I pulled a trailer or loaded the bed.

When I removed those tires last month, they had about 60,000 miles on them and plenty of tread still remaining.

Once again, the air pressure is for the load, not for the tires. Running unnecessarily high air pressures causes a harsh ride, degraded handling, and uneven tire wear.
etex211 is offline   Reply With Quote
Old 07-19-2016, 05:14 AM   #10
Senior Member
 
ecoboosteagle's Avatar
 
Join Date: Mar 2015
Location: western
Posts: 112
My truck came with max tow and LT tires (c rated load range I believe). My sticker says 40 psi. One year ago the tires were replaced with LT e rated max 65 psi. When I'm not towing I run the 40 psi. If I'm towing longer distance I bump my rear to 55 psi. I got this number based on my r.a. Weight when towing. There is a calculator I got for weights and psi on the internet but can't recall where...
I would bump your pressure to 40 psi minimum on those new tires. 32 psi is definitely a p rated tire.
__________________
2015 Eagle 324bhts
tv. 2012 F-150 s/c lariat ecoboost 3.73 max tow
ecoboosteagle is offline   Reply With Quote
Old 07-19-2016, 08:12 AM   #11
Senior Member
 
Join Date: Aug 2013
Location: NC
Posts: 974
Quote:
Originally Posted by etex211 View Post
The vehicle manufactures put lots of R&D hours into determining the optimum tire pressure for a vehicle. The weight of the vehicle, the quality of the ride, the handling, and the fuel mileage are all considered.

On a pickup, the recommended tire pressure for the rear assumes the truck is loaded to capacity, so you are actually better off running a lower pressure when the vehicle is unloaded.

Running unnecessarily high air pressures will compromise the vehicle's handling and can cause you to lose control.

My recommendation is to follow the manufacturers suggested air pressures. If you've upgraded the tires to a higher load range, then you have the ability to raise the air pressure when you pull the trailer, and then return the air pressure to normal when the trailer is unhitched.
The engineering work is based upon the specific tires mentioned on the yellow sticker. When you upgrade tires, rims and other suspension components you have no basis to claim partial compliance with the yellow sticker. Data and outcomes change when one variable is changed. Until I test my changes, and they are my changes, I cannot predict an outcome by partial compliance with other variables.
The best answer is be safe and use common sense.
eldermike is offline   Reply With Quote
Old 07-19-2016, 08:20 AM   #12
Senior Member
 
Join Date: Jul 2015
Location: Detroit
Posts: 294
Quote:
Originally Posted by eldermike View Post
The engineering work is based upon the specific tires mentioned on the yellow sticker. When you upgrade tires, rims and other suspension components you have no basis to claim partial compliance with the yellow sticker. Data and outcomes change when one variable is changed. Until I test my changes, and they are my changes, I cannot predict an outcome by partial compliance with other variables.
The best answer is be safe and use common sense.
While I agree with you, unfortunately common sense and the general public's knowledge of how to fill a tire are rarely in sync. Based on the small number of responses, and those who are recommending to inflate to the sidewall rated pressure (which is MAX pressure, not recommended pressure for those who don't know), it appears that common sense is not all that common.
__________________
2005 Ford Excursion 6.8L, 4.56
2016 Eagle 324BHTS, P3, PP 3P

jasoncw is offline   Reply With Quote
Old 07-19-2016, 08:36 AM   #13
Site Team
 
norty1's Avatar
 
Join Date: Jan 2011
Location: James Island, SC
Posts: 22,772
When you change the LR of the tire, it changes the whole equation. The sticker is no longer valid and you have to take the info provided on the sticker and transpolate it to new information for that new tire.

If you don't do that, who knows whats happening.
__________________
Moderator
2011- 351RLTS Eagle, MorRyde suspension/pin box,
2017- F350 6.7 PSD Lariat FX4,SRW, SB,CC
Hughes PWD SP-50A, TST TPMS
Gator roll-up bed cover
B&W Turnover ball, Companion Std hitch
Can't find what you're looking on JOF? Try Jayco Owners Forum Custom Google Search
norty1 is offline   Reply With Quote
Old 07-19-2016, 10:48 PM   #14
Junior Member
 
sd396's Avatar
 
Join Date: May 2016
Location: Kelowna
Posts: 25
You need to weigh the front and rear axle at a scale and determine the load on each tire. Then use this formula:

Per tire weight divided by max tire weight(3415 lbs) x max tire pressure(80psi) = inflated tire pressure.

This is the formula I use on my 2500 Dodge with E-rated tires. I'm currently running about 48psi front and 37psi rear with a light load in the back. Running too high pressures especially in the rear of a light weight pick-up will cause the center of the tires to wear prematurely.
sd396 is offline   Reply With Quote
Old 07-20-2016, 06:52 AM   #15
Senior Member
 
Join Date: Aug 2013
Location: NC
Posts: 974
Quote:
Originally Posted by jasoncw View Post
While I agree with you, unfortunately common sense and the general public's knowledge of how to fill a tire are rarely in sync. Based on the small number of responses, and those who are recommending to inflate to the sidewall rated pressure (which is MAX pressure, not recommended pressure for those who don't know), it appears that common sense is not all that common.
Max tire pressure is related to max load rating. After thinking about this thread a bit I think it's time to introduce the idea of load as our focus when questions come up concerning tire pressures.

I run my E's at 65lbs per the yellow sticker on my F350 DRW. That works fine on the DRW setup. When I owned a F250 SRW I ran E's at max pressure based on load when towing.
Disclaimer:
Running 80psi when unloaded is not safe for people that don't understand the dynamic changes that occur in the suspension of your truck based upon tire pressure per loading. Your tires will bounce/rebound much better than OEM tires/pressures allow when adding pressure without adding load. The footprint is changed/reduced by increasing pressure without increasing load, and this reduces traction/friction. Add these two changes together and then introduce some rain on the road and you are now driving a vehicle of your own design and your own responsibility. If you do not understand these owner introduced limitations then do not stray far from the yellow sticker on your vehicle.
__________________
No man has a good enough memory to be a successful liar. Abraham Lincoln

2016 36FBTS Pinnacle
2016 F350, 6.7, 4x4, DRW, long bed
B & W Companion 5th wheel Hitch
eldermike is offline   Reply With Quote
Old 07-20-2016, 07:09 AM   #16
Senior Member
 
Atlee's Avatar
 
Join Date: Jun 2016
Location: Mechanicsville
Posts: 1,479
I'm lucky. I just leave my tires at 50 psi front and 55 psi rear. My current trailer is relatively light, 4950# gvwr.

But of course that's the air pressure Ford calls for on the yellow sticker. My truck came with OEM LT E tires.

My previous truck, 2005 F150, came with P tires. The max pressure on the side wall was 44#. Yellow sticker was somewhere in the 30's. When I was towing with those tires, I did inflate the tires up to 44 psi. Otherwise, I left them at the yellow placard psi number.
Atlee is offline   Reply With Quote
Reply

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


» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Jayco, Inc. or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 04:01 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright 2002-2016 Social Knowledge, LLC All Rights Reserved.