Reply
 
Thread Tools Display Modes
Old 07-30-2014, 09:52 PM   #11
Mod free 5er
 
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,215
Even with my advanced stages of CRS, I haven't forgotten yet.
__________________

__________________
OldCoot is offline   Reply With Quote
Old 07-30-2014, 10:04 PM   #12
Member
 
Smitty72's Avatar
 
Join Date: Jun 2014
Location: Nova Scotia
Posts: 48
lol... I had to look that one up My Dad says he suffers from CRAFT ... It must run in the family. ( can't remember a #%^ thing)
__________________

__________________
Smitty72 is offline   Reply With Quote
Old 07-30-2014, 10:16 PM   #13
Site Team
 
dcheatwood's Avatar
 
Join Date: Nov 2011
Posts: 3,380
My TV has E tires. I run 55 f&r unloaded, and 70 front, 75 rear when towing fiver.
__________________
2013 Rockwood 8282WS
Reese Revolution Pin, Reese 16K
2008 Tundra Limited Double Cab 5.7L
Air Lift 5000 w/Wireless Air

dcheatwood is offline   Reply With Quote
Old 07-30-2014, 10:25 PM   #14
Senior Member
 
schrederman's Avatar
 
Join Date: Apr 2012
Location: Weatherford, TX
Posts: 977
I don't forget it... I check them monthly... Fuel economy is more affected by low tires than most other things. I'm cheap... but at least I know it.
__________________
J & D in Lovely Weatherford, TX
2016 Jayco White Hawk 28DSBH TT
2014 Ram 2500 Crew Cab 4X4 6.7L Cummins
schrederman is offline   Reply With Quote
Old 07-30-2014, 10:29 PM   #15
Senior Member
 
turnerpa's Avatar
 
Join Date: Jun 2013
Posts: 204
I also have load range E tires and I run 65 in the front and 80 in the rear at all times. I do this because there have been many times when I get somewhere and all of a sudden I have to hook onto some sort of trailer or end up loading the bed with stuff. I figure if I just leave the rear at 80 I'll never have to worry about what pressure I have for the load that's on me.


Sent from my iPhone using Forest River Forums
__________________
turnerpa is offline   Reply With Quote
Old 07-31-2014, 05:53 AM   #16
Senior Member
 
Join Date: Feb 2013
Posts: 137
Tire pressure advice is all about load on the seperate tires, but mostly axle loads are used.

I determined by reactions that if you have 85% of the load, that the pressure is calculated for, in real on a tire , that below that discomfort begins by bouncing.
for trailers I dare to go as low as 80% before screws tremble out of the woodwork.

Then front axle does not chanche much unloaded or loaded , because you simply cant put many things in the cabine, exceptions , verry heavy persons and motor on the front bumper.

Even the weight of the luggage is mostly even behind the rear axle wich lifts up the front.

So if we calculate the pressure for the GAWR ( give alternative word reading, correction Gross axle weight rating) +5% the minimum weight if equally devided ( never so) can go as low as 85% of 105%=89,25% , comfort is still acceptable. Example GAWR front 4000 lbs then if real axle weight is 3600 lbs comfort is still ok.

Rear is another thing , loaded and unloaded makes a big difference.
Though you are not allowed to go over the GAWR motorhomes do often go over that , but normal lighttrucks , wich is the case here, stay under that too.
So for rear you have to use different pressures unloaded and loaded because it cant be done with one pressure to keep the loadpercentage ( as I call it L%) between the borders of 85% and 100%.
Because driver and co driver are in front, the rear bumping is not noticed that bad. So I would calculate pressure ( with my spreadsheet for motorhomes) for GAWR/0.85 to give no bumping when excact GAWR and leaves as much possible reserve for little overloading ( 18%).

Its never bad for the tires to keep at 80 psi ,only for your comfort but also important gripp.

To make this F( for ferry) long story short, let me calculate so give maximum load of tires and GAWR's . Dangerous quess of mine is front unloaded front 50 and rear 60, and loaded front still 50 and rear 80.

But if calculation gives 90 that is allowed by the tire-makers , because this 80 AT-pressure is not the maximum pressure of the tire, as is thought by many.
For SL ( standard load) /P-tires this maxloadpressure is 35 psi for american tires, and XL/reinforced/Extraload 41 psi . Those tires only give maximum pressure on tire between 44 and 60 psi . From C-load and up ( C-load 50 psi) they give the AT-pressure/maxloadpressure/reference-pressure on sidewall and the maximum pressure shal be about 1.4 times the Pr ( wissle sound oh no Pressure reference), I concluded of a PDF of Semperit( Continental).
__________________
jadatis is offline   Reply With Quote
Old 07-31-2014, 06:28 AM   #17
Senior Member
 
BiigDaddy's Avatar
 
Join Date: Apr 2011
Posts: 449
Quote:
Originally Posted by force View Post
I run what it says on the door sticker, 60 front, 70 rear (tires are rated for 80), regardless of towing or not. Don't see a reason to over-complicate things, or worse, take off and forget you are 20 psi short.
X2
__________________

2013 GMC Savana 2500 FBI Edition
2015 Rockwood 8327SS stuffed with 5 kids!

SE Michigan
Nights camped 2014: 48
BiigDaddy is offline   Reply With Quote
Old 07-31-2014, 07:23 AM   #18
Member
 
Smitty72's Avatar
 
Join Date: Jun 2014
Location: Nova Scotia
Posts: 48
Well it seems like I am currently running low unloaded already and will certainly be adding more PSI in the back next time I hitch up. I guess it will be a little trial and error as far as keeping the comfortable ride vs optimal performance. Although it is my daily driver it doesn't go too far, just around town, when not towing. Thanks for your help.
__________________
Smitty72 is offline   Reply With Quote
Old 07-31-2014, 07:33 AM   #19
Senior Member
 
camper1999's Avatar
 
Join Date: Feb 2012
Posts: 778
65 front 75 rear that what is list in my manual and on the door.
__________________
2012 Cedar Creek Silverback 29RE
2011 GMC 2500HD Diesel
camper1999 is offline   Reply With Quote
Old 07-31-2014, 07:39 AM   #20
Senior Member
 
Join Date: Dec 2013
Posts: 147
Quote:
Originally Posted by turnerpa View Post
I also have load range E tires and I run 65 in the front and 80 in the rear at all times. I do this because there have been many times when I get somewhere and all of a sudden I have to hook onto some sort of trailer or end up loading the bed with stuff. I figure if I just leave the rear at 80 I'll never have to worry about what pressure I have for the load that's on me.


Sent from my iPhone using Forest River Forums
X2
__________________

__________________
036.6turbo is offline   Reply With Quote
Reply

Tags
pressure, tire, tow vehicle

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 Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 02:43 AM.