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-   -   WOW! 4 wheel weigh - don't delay (https://www.irv2.com/forums/f258/wow-4-wheel-weigh-dont-delay-169048.html)

ctpres 07-18-2013 05:02 PM

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.

wildtoad 07-18-2013 05:14 PM

I would be interested to know what the manufacturers GVWR, GAWR's are for your unit and what you actually weighed in at.

ImagineIF 07-18-2013 05:16 PM

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!

Old Scout 07-18-2013 05:19 PM

Ok--usually the single front tires require more pressure per weight distro than the 4 dual tires in back???????....just saying

wildtoad 07-18-2013 05:22 PM

Quote:

Originally Posted by Old Scout (Post 1648011)
Ok--usually the single front tires require more pressure per weight distro than the 4 dual tires in back???????....just saying

Thus the reason for my question...

Ray,IN 07-18-2013 06:51 PM

Quote:

Originally Posted by wildtoad (Post 1648000)
I would be interested to know what the manufacturers GVWR, GAWR's are for your unit and what you actually weighed in at.

iRV2 Forums - View Profile: ctpres makes it easy to look them up. Sounds like about the same size as yours.

CountryFit 07-18-2013 08:35 PM

Quote:

Originally Posted by Old Scout (Post 1648011)
Ok--usually the single front tires require more pressure per weight distro than the 4 dual tires in back???????....just saying

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??

Mr_D 07-18-2013 08:43 PM

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.

Mr_D 07-18-2013 08:54 PM

Quote:

Originally Posted by CountryFit (Post 1648300)
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??

Did you weigh your rig or just guess?

Old Trucker 07-18-2013 10:26 PM

Quote:

Originally Posted by ctpres (Post 1647986)
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.


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

ctpres 07-19-2013 11:05 AM

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.

wildtoad 07-19-2013 02:37 PM

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.

chief02 07-19-2013 02:49 PM

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.

ImagineIF 07-19-2013 04:32 PM

Quote:

Originally Posted by Old Trucker (Post 1648479)

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.

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.


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