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RV-Dreams.com Home -> RV-Dreams Community Forum -> Tow Vehicles -> Question About my Dually Tires
Post Info TOPIC: Question About my Dually Tires
jimdee


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Question About my Dually Tires
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Hi everyone... I have a 2007 GMC Sierra Classic 3500 Duramax/Allison dually.  I recently bought 4 new rear tires, Firestone Transforce HT 215 85R/16, Load Range E.  I looked up the load rating for these tires and it's 2,760 lbs per tire.  That's 5,520 lbs per side, and over 11,000 lbs total capacity on the rear.  Two questions:  1.  Is that enough weight-bearing capacity to pull my new Cameo 36FWS (it'll weigh around 16K when loaded), and 2. What's the optimal front and rear inflation pressures while towing?  Thanks.  Jim

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Jim and Dee
Retired USAF - Full Time RV'ers
2010 Carriage Cameo 36FWS (Tumbleweed)
2007 GMC 3500 dually, Duramax/Allison
http://tumbleweed-jimdee.blogspot.com
FD5


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I would think that is more then enough.  The pin weight is generally 15-25% of the trailer weight, most people use 20%.  Roughly 3200 lb pin weight plus weight of truck rear axle I think you will be well under the 11k tire rating.  The only true way to find the pin weight is to have it weighed. 
Use the tire pressure recommended by the manufacture, should be inside the door.  You can adjust tire pressure after you weigh the rig and truck.

See you down the road and congratulations on the new home.

Stay Safe

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John & Bridget
Madison, MS
2012 Ford F550
2011 DRV Mobile Suite 36TKSB3
2002 Suzuki Vitara JLX
http://www.travelsofjohnandbridget.blogspot.com/

Mississippi Independent Amsoil Dealer
chevman


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No question you will need 80 lbs of air pressure. There is no other opiton for this.
chevman

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Luvglass


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You should use the pressure shown on the door sticker, especially for the rear tires.
We lowered the front tires by 5# to soften the ride, but the rears need the maximum recommended by the truck manufacturer.

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Fred Wishnie

Full time since Feb 06 in Carriage Cameo 35KS3 and Ford F350


“If all you ever do is all you’ve ever done, then all you’ll ever get is all you ever got.”
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