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Old 02-02-2007, 11:41 AM   eBay Motors   #5 (permalink)
JMD
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Load Rating Vs. Load Range

Quote:
Originally Posted by dandy View Post
I bought my first diesel truck, a 2006 2500HD/Duramax. Dealer told me that it had a lot more load than it really does. I also bought a 5th wheel with a 2800# pin weight. Loaded, my rear tires are overloaded by 1200#. I can't find a tire in a load range higher than the "E" range now on the truck. I have seen 19.5 inch wheels and tires that will give me the extra capacity.
I know that I screwed up, so please help me without beating me up.
ok,, I did a litle research just for you:

I checked on the discount tire website looking for tires I believe to fit your application. I have learned a little about "load ranges" and "load rating". It seems that "load range" is used for tires designated as "light truck" only. If you utilize the "load rating" instead of the "load range" system you will be able to find tires with a higher weight rating.

Go to this website: http://www.discounttire.com/dtcs/sea...91&rd=16&ar=75

you will see this tire:
Pathfinder All Terrain
LT265/75R16E1 123Q W (1575

It is my understanding that the "123" toward the end of the tire size is the "load rating".

At this website there is a chart that identifies the "load rating":
http://www.discounttire.com/dtcs/infoLoadIndex.dos

By translating the "123" into "load rating" it should be 3,417 lbs per tire, which I think is better than what you have seen using the "load range" scale, (about 2800 lbs?).

Using this method it looks to me that you can get up to nearly 7,000 lbs on the rear axle, I think that this would probably do the trick for you!

If this is not quite enough, I would think that you could do better than the "123" rating by looking around.

From what I have gathered the "Load Range" system is kind of a "bastard child" of the tire industry, and that it is primarily used on LT tires for inflation recomendations.

Good Luck!
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2005 Chevrolet 3500 (Edge)

2005 Chevrolet 3500 Work Truck (5th Wheel)
w\ 45' Flatbed, 37' Van Trailer, 28' Van Trailer
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