Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
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 10-07-2011, 09:39 AM   #1
Senior Member
 
Dunner's Avatar
 
Join Date: Jun 2011
Location: Phx, Arid~zona
Posts: 11,106
Does this MH weight seem realistic

Front axles 5900
Rear axles 11800
Total 17700

Seems strange that the rear is exactly double the front weight.

I had it weighed on Danny's Big Rig Resort's certified, segmented scales across from a Flyin' J with a full tank and most of the cargo loaded.

I did a quick Google for "Toyo tire chart" and couldn't find one for my new 245/70R-19.5 tires.
I watched S&S Tire in Avondale, AZ spin balance them.

Edit: I found the chart.
__________________

__________________
2004 32' National Sea Breeze 1311 Class A on a F-53 Chassis, CHF, TST TPMS, 5Star Tune.
If Dunner (RVM23) can't fix it, it ain't broke!
Cheap Handling Fix Poll. Click Here to vote?
Dunner 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 10-07-2011, 11:10 AM   #2
Senior Member
 
Dunner's Avatar
 
Join Date: Jun 2011
Location: Phx, Arid~zona
Posts: 11,106
My Toyos are rated at:
Max Load Single 4805 @ 120 P.S.I. x 2 = 9610 Front
Max Load Dual - 4540 @ 120 P.S.I. x 4 = 18160 Rear

The chart I found shows this:

245/70R19.5 - - - - - Inflation P. S. I.
-- - - - 80 -- 85 - 90-- 95 -- - 100-- 105- 110 - - 115 - 120
Single 3640 3740 3890 4080(F) 4190 4335 4540(G) 4620 4805(H)
Dual - 3415 3515 3655 3860(F) 3940 4075 4300(G) 4345 4540(H)

So, with my weight of:
Front axles 5900/2 = 2950 per tire.
Rear axles 11800/4 = 2950 per tire.

I read it that I can go down to 80 P.S.I. Am I reading it right?
__________________

__________________
2004 32' National Sea Breeze 1311 Class A on a F-53 Chassis, CHF, TST TPMS, 5Star Tune.
If Dunner (RVM23) can't fix it, it ain't broke!
Cheap Handling Fix Poll. Click Here to vote?
Dunner is offline   Reply With Quote
Old 10-07-2011, 01:04 PM   #3
Member
 
Kathy_MD's Avatar
 
Join Date: Sep 2008
Posts: 75
I run 80psi all 6 tires per Goodyear chart for PSI and Load.

Conditions:
7/8 fuel
1/3 Water
Empty Black
Empty Grey

Per CAT scales

Front 6000 = 3120 left tire + 2880 right tire
Rear 12940 = 6560 left tires + 6380 right tires
TOTAL 18940
__________________
2008 Daybreak 3578 on a Ford F53 V10 228" WB 20.5K Lb Chassis
Four-Down towing a 2008 Ford Escape
Kathy_MD is offline   Reply With Quote
Old 10-07-2011, 01:37 PM   #4
Senior Member
 
Dunner's Avatar
 
Join Date: Jun 2011
Location: Phx, Arid~zona
Posts: 11,106
Goodyear and Toyo show the same weight rating and your rig is heavier. I have a TST TPMS on the way, so I will watch tire temps. Since I will have some tongue weight with the 20' enclosed, I think 85 might be a safer choice.
__________________
2004 32' National Sea Breeze 1311 Class A on a F-53 Chassis, CHF, TST TPMS, 5Star Tune.
If Dunner (RVM23) can't fix it, it ain't broke!
Cheap Handling Fix Poll. Click Here to vote?
Dunner is offline   Reply With Quote
Old 10-08-2011, 10:11 AM   #5
RV Mutant #14
 
Wayne M's Avatar


 
Winnebago Owners Club
Texas Boomers Club
Freightliner Owners Club
iRV2 No Limits Club
Join Date: Aug 2008
Location: Texas
Posts: 12,202
Dunner,
Yes, you could run at 80 PSI and you would still have a 600+/- fudge factor. Just don't eat greasy food. However, you are running at the bottom end of the scale and should there be a loss of air you may possibly be under inflated. Personally I try to find a range that gives me a fudge factor in both directions and take temperature and altitude changes into consideration. (JMHO)

Happy trials.
__________________
Wayne MSGT USMC (Ret) & Earlene (CinCHouse)
2015 Winnebago Tour 42QD
RVM14
It is what it is, and then it is what you make of it.
Wayne M is offline   Reply With Quote
Old 10-08-2011, 10:49 AM   #6
Senior Member
 
Dunner's Avatar
 
Join Date: Jun 2011
Location: Phx, Arid~zona
Posts: 11,106
Kathy_MD, what load rating are your tires? Mine are "H".

245/70R19.5 - - - - - Inflation P. S. I.
-- - - - 80 -- 85 - 90-- 95 -- - 100-- 105- 110 - - 115 - 120
Single 3640 3740 3890 4080(F) 4190 4335 4540(G) 4620 4805(H)
Dual - 3415 3515 3655 3860(F) 3940 4075 4300(G) 4345 4540(H)

Not sure why they specify F, G, and H other than to designate that those pressures are for those rated tires.
__________________
2004 32' National Sea Breeze 1311 Class A on a F-53 Chassis, CHF, TST TPMS, 5Star Tune.
If Dunner (RVM23) can't fix it, it ain't broke!
Cheap Handling Fix Poll. Click Here to vote?
Dunner is offline   Reply With Quote
Old 10-08-2011, 10:52 AM   #7
Senior Member
 
njs42's Avatar
 
National RV Owners Club
Workhorse Chassis Owner
Join Date: Apr 2011
Location: Federal Way, Wa.
Posts: 2,901
Dunner: What you do not have is a four corner weigh so you need to consider maybe the end of one axel is heavier than the other and allow some fudge factor. Maybe 85 does it?

Both ends of the same axel should have the same inflation.
__________________
I do all my own stunts
03 Dolphin LX 6355, Workhorse W22, 8.1 vortec, 04 CR-V, Blue Ox, Brake Pro----Norm, Barb and
Doc(He's a PhD)
njs42 is offline   Reply With Quote
Old 10-08-2011, 10:59 AM   #8
Senior Member
 
Dunner's Avatar
 
Join Date: Jun 2011
Location: Phx, Arid~zona
Posts: 11,106
Yeah, I'm gonna get it weighed to check each axle weight. For now, I'm gonna drop them down from the 95 S&S put in to 85. That's what the G670s had in them. The Toyos do ride quieter than the 670s.
__________________
2004 32' National Sea Breeze 1311 Class A on a F-53 Chassis, CHF, TST TPMS, 5Star Tune.
If Dunner (RVM23) can't fix it, it ain't broke!
Cheap Handling Fix Poll. Click Here to vote?
Dunner is offline   Reply With Quote
Old 10-08-2011, 01:55 PM   #9
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,084
85 psi ought to be fine. Gives some extra on the axle weight and keeps the tire above minimum inflation (80), so they won't be too soft if they get a little low before you notice it. You really don't want to run below the minimum in the inflation table, even if the tire is underloaded. Below a certain point the tire no longer has the shape that the engineers designed and you get exessive sidewall flexing or maybe thread squirming, both of which cause the tire to heat up internally and self-destruct.
__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is online now   Reply With Quote
Old 10-08-2011, 06:06 PM   #10
Senior Member
 
Dunner's Avatar
 
Join Date: Jun 2011
Location: Phx, Arid~zona
Posts: 11,106
Just lowered them from 100 to 85. Should ride a lot better. S&S said they put in 95, but that was with a stick gauge. Will wait the recommended 3 hours to let the sun baked air cool down.
__________________
2004 32' National Sea Breeze 1311 Class A on a F-53 Chassis, CHF, TST TPMS, 5Star Tune.
If Dunner (RVM23) can't fix it, it ain't broke!
Cheap Handling Fix Poll. Click Here to vote?
Dunner is offline   Reply With Quote
Old 10-08-2011, 06:16 PM   #11
Registered User
 
Vintage RV Owners Club
Gulf Streamers Club
Join Date: Oct 2010
Location: Indiana
Posts: 4,954
My rigs total weight is 15300 lbs... I run at 75 psi, though I prolly should be at 65psi and I could go all the way down to 55 psi.. When I bought it, it was at 50psi all around...
__________________
Midniteoyl is offline   Reply With Quote
Old 10-08-2011, 06:21 PM   #12
Senior Member
 
Dunner's Avatar
 
Join Date: Jun 2011
Location: Phx, Arid~zona
Posts: 11,106
What Gary said makes good sense. Even though you could doesn't mean you should.
__________________

__________________
2004 32' National Sea Breeze 1311 Class A on a F-53 Chassis, CHF, TST TPMS, 5Star Tune.
If Dunner (RVM23) can't fix it, it ain't broke!
Cheap Handling Fix Poll. Click Here to vote?
Dunner is offline   Reply With Quote
Reply

Tags
weight



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
How much weight is realistic? jjorg Truck Camper Discussion 15 05-07-2011 02:18 PM
Weight Limit and Cap. travelgirl Just Conversation 18 11-20-2010 11:55 PM
Finally obtained a new 4 corner weight since we loaded the rig for full timing. SargeW Class A Motorhome Discussions 6 06-10-2008 03:54 PM
New RV Weight Label Coming Route 66 iRV2.com General Discussion 12 05-27-2008 12:50 PM
King Pin Hitch Weight wakamicamper Trailer Towing and Tow Vehicles Discussion 7 02-16-2008 04:32 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:04 PM.


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