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07-18-2013, 05:02 PM
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#1
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Senior Member
Ford Super Duty Owner
Join Date: May 2010
Location: Chasing 70 degrees in lower 48
Posts: 2,031
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WOW! 4 wheel weigh - don't delay
Three years on the road and finally got four wheel weigh and the results are amazing.
Stopped by Brazel's RV Performance Center in Centralia, WA for service on leveling system and found out from another customer that Brazel's had equipment to do four corner weigh. Added that to work list and am VERY happy that I did.
Mfg says 95 front and 80 rear.
Per four wheel weigh and Goodyear tire table
70 front and 100 rear.
BTW rumors that Brazel's provides outstanding service are true.
Kudos to Brazel's RV Performance Center crew for providing great service.
__________________
Suzie & Chuck USNR USAF USCGA Challenger Owners Club 2015 37KT Challenger, Demco Commander tow bar, Ready Brake, Sewer Solutions, Safe-T-Plus 41-230, 5-Star tune, towing 2017 Ford Edge FWD 3.6L V-6 four down & 385 FastTrack kayak in the basement.
Summer - Creede, CO Winter - Okeechobee, FL
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07-18-2013, 05:14 PM
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#2
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Senior Member
Join Date: Jul 2010
Posts: 4,543
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I would be interested to know what the manufacturers GVWR, GAWR's are for your unit and what you actually weighed in at.
__________________
Tom Wilds
Blythewood SC
2016 Newmar Bay Star Sport 3004
2015 Jeep Wrangler 2DR 4WD Sahara, Automatic, Hard Top
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07-18-2013, 05:16 PM
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#3
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Senior Member
Join Date: May 2010
Posts: 1,061
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It blows me away that so many don't have the MHs weighed. With tires be so critical to safe operation this is a must do!
__________________
Gil
03 Prevost H3-45
Hoffman Conversion
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07-18-2013, 05:19 PM
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#4
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Senior Member
Join Date: Nov 2005
Posts: 6,326
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Ok--usually the single front tires require more pressure per weight distro than the 4 dual tires in back???????....just saying
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Old Scout
2003 Alpine 40' MDTS
New Braunfels, Texas
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07-18-2013, 05:22 PM
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#5
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Senior Member
Join Date: Jul 2010
Posts: 4,543
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Quote:
Originally Posted by Old Scout
Ok--usually the single front tires require more pressure per weight distro than the 4 dual tires in back???????....just saying
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Thus the reason for my question...
__________________
Tom Wilds
Blythewood SC
2016 Newmar Bay Star Sport 3004
2015 Jeep Wrangler 2DR 4WD Sahara, Automatic, Hard Top
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07-18-2013, 06:51 PM
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#6
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 21,376
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Quote:
Originally Posted by wildtoad
I would be interested to know what the manufacturers GVWR, GAWR's are for your unit and what you actually weighed in at.
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iRV2 Forums - View Profile: ctpres makes it easy to look them up. Sounds like about the same size as yours.
__________________
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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07-18-2013, 08:35 PM
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#7
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Community Moderator
Join Date: Sep 2011
Location: Between the Oceans
Posts: 6,889
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Quote:
Originally Posted by Old Scout
Ok--usually the single front tires require more pressure per weight distro than the 4 dual tires in back???????....just saying
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agreed. the manufacturer's tag on my rig specified 125 psi front and 115 rear, i felt it's kinda at high end so i set 115 front and 110 rear. op's 70 at front is too low, maybe??
__________________
Steven & Polly
2000 Country Coach Intrigue 40' with ISC 350
2014 Ford C-Max Energi
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07-18-2013, 08:43 PM
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#8
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Senior Member
Country Coach Owners Club Winnebago Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,155
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Yep, something wrong with the OP's figures I think.
OP: please post your weights, tire brand, model and sizes and someone will verify them.
I've never seen one that needed pressures like that with the front so low and the rears that much higher.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '14 Jeep JKU Dragon Edition
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07-18-2013, 08:54 PM
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#9
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Senior Member
Country Coach Owners Club Winnebago Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,155
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Quote:
Originally Posted by CountryFit
agreed. the manufacturer's tag on my rig specified 125 psi front and 115 rear, i felt it's kinda at high end so i set 115 front and 110 rear. op's 70 at front is too low, maybe??
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Did you weigh your rig or just guess?
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA, SKP
RV'ing since 1957, NRA Benefactor Life, towing '14 Jeep JKU Dragon Edition
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07-18-2013, 10:26 PM
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#10
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Senior Member
Join Date: Nov 2011
Posts: 204
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Quote:
Originally Posted by ctpres
Three years on the road and finally got four wheel weigh and the results are amazing.
Stopped by Brazel's RV Performance Center in Centralia, WA for service on leveling system and found out from another customer that Brazel's had equipment to do four corner weigh. Added that to work list and am VERY happy that I did.
Mfg says 95 front and 80 rear.
Per four wheel weigh and Goodyear tire table
70 front and 100 rear.
BTW rumors that Brazel's provides outstanding service are true.
Kudos to Brazel's RV Performance Center crew for providing great service.
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I am amazed at how everybody gets so excited about weight per corner of the coach and per axel and tire pressure reccomends per loaded weight. I hear guys changing there tire pressure per weoght of their coach.
I am a retired cross country trucker. If a trucker worried about these items every time he loaded amd unloaded, he would be BROKE. Sure we weighed our trucks, but it was to comply with DOT weight laws and be compliant at the highway weigh stations, to keep from a ticket. In most cases It was not can our equipment handle it. I recently sold my 99 Alpine coach. I weighed it one time fully loaded full of fuel and was going to be gone for 3 months, toad was a 2000 Cheve Malibu, and still 3000 pounds below max weight allowed. Old trucker
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07-19-2013, 11:05 AM
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#11
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Senior Member
Ford Super Duty Owner
Join Date: May 2010
Location: Chasing 70 degrees in lower 48
Posts: 2,031
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OP Here.
Damon 3211 on w22 with chevy 8.1 and original Goodyear tires- label in coach: GAWR front 8000 and 13500 rear with 245 70R 19.5G tires.
GCWR 26000
GVWR 21200
Per four corner weight analysis:
Actual weight in pounds
FL 3320 FR 3120 Total 6440
RL 6600 RR 6600 Total 13200
Combined L 9920
Combined R 9720
Total weight 19640
Weight Distribution
Front axel 33% Rear 67%
Left side 51% Right 49%
Reserve 1560
Recommended tire pressure front 70lbs Rear 100
Notes: No driver or passengers, about 60 gal gas, and 1/3 black 1/3 fresh and 2/3 grey and fully stocked for travel.
If anyone finds problem with weight analysis - let me know.
__________________
Suzie & Chuck USNR USAF USCGA Challenger Owners Club 2015 37KT Challenger, Demco Commander tow bar, Ready Brake, Sewer Solutions, Safe-T-Plus 41-230, 5-Star tune, towing 2017 Ford Edge FWD 3.6L V-6 four down & 385 FastTrack kayak in the basement.
Summer - Creede, CO Winter - Okeechobee, FL
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07-19-2013, 02:37 PM
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#12
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Senior Member
Join Date: Jul 2010
Posts: 4,543
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Based on the Goodyear chart I read (and I assume I'm reading it correctly) 80 psi is the lowest you should use on a G rated tire made after 2/28/2006 which will clearly support your front weight. (You may have a different chart, mine has both pre and post 2/28/2006). The pre 2/28/2006 line in the chart does show support for 70 psi. You rear weight of 13,200 would only need a psi of 80 as well, but 85 would be better.
__________________
Tom Wilds
Blythewood SC
2016 Newmar Bay Star Sport 3004
2015 Jeep Wrangler 2DR 4WD Sahara, Automatic, Hard Top
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07-19-2013, 02:49 PM
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#13
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Registered User
Excel Owners Club Retired Fire Service RVer's
Join Date: Nov 2010
Location: Farmington NM
Posts: 1,822
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If truckers paid better attention to tire inflation we would not have rubber aligator skins laying all over the highway. Just saying. BTW..former DOT transportation safety director in my second career.
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07-19-2013, 04:32 PM
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#14
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Senior Member
Join Date: May 2010
Posts: 1,061
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Quote:
Originally Posted by Old Trucker
I am amazed at how everybody gets so excited about weight per corner of the coach and per axel and tire pressure reccomends per loaded weight. I hear guys changing there tire pressure per weoght of their coach.
I am a retired cross country trucker. If a trucker worried about these items every time he loaded amd unloaded, he would be BROKE. Sure we weighed our trucks, but it was to comply with DOT weight laws and be compliant at the highway weigh stations, to keep from a ticket.
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Big difference. Commercial truckers inflate their tires to the pressure needed to meet DoT axle weight limits or trailer/tractor axle limits, which ever is less. RV tires are inflated for the actual expected load. There are a lot of coach's that weigh more than the manufacturer established and therefore the tire pressure chart placed on the vehicle is wrong. No one needs to weigh and reweigh as an ongoing practice if they did their weigh when the coach was full of fluids and loaded as would be expeted. Steer axle weights can well exceed 12,000 pounds for 40-footers and bus conversions coming close to 20,000 pounds on the steer axle.
Another benefit of having a loaded RV weighed is that it might alert an owner to how over weight thier RV is so they can shed some stuff.
__________________
Gil
03 Prevost H3-45
Hoffman Conversion
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