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Old 10-12-2015, 11:49 PM   #1 (permalink)
grassmaster
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Pin wgt capicity

I've looked but can't can find a simple enough explanation for me. My 2007 2500hd 4x4 crewcab duramax has E rated tires and airbags. Will it handle a 5th wheel with a pin weight of 2500-2600 lbs assuming 350-400 lbs of people and stuff are in the cab. The rear weight of the truck is 2900 with me in it.

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Old 10-13-2015, 01:31 AM   #2 (permalink)
gmcmax05
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Will it handle it? Probably. Are you going to be over it's GWCC, & RAWR? Absolutely

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Old 10-13-2015, 07:26 AM   #3 (permalink)
Tom S.
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Max05 pretty much said it. Your tires are sufficient, and with the air bags you'll be able to level the truck when the trailer is hooked up. However airbags and tires don't change the truck's weight rating, and with that load, you will be exceeding it. I see 2500's pulling these weights all the time, so the question of can they do it is moot. Should they is another story. Being overloaded affects pulling, which the truck is capable of doing, but it also affects handling and stopping, neither of which can be compensated for without making some major changes. It's up to you whether you wish to take those risks.
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Old 10-13-2015, 11:08 AM   #4 (permalink)
IGO1320
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I pull commercially with the truck in my sig, as long as you have air bags and good brakes on both truck and trailer you will have no problems legal or otherwise. I also don't tow big trailers faster than 65mph, it is just safer.

As a side note I have 516k miles on my truck now with the original drive line with no engine oil smoke or leaks. Our trucks will handle the load fine with good maintenance.
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Old 10-13-2015, 12:49 PM   #5 (permalink)
grassmaster
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2500 lbs of pin weight is a worse case. Seems that the rear axle rating is just north of 6,000. the weight of the rear truck is 2900 with me (at 200) and roughly a full tank of gas. I would add another 200 to this. Based on the axle rating, I have about 2,900 lbs to play with.
The camper I'm looking at is advertised to have a pin weight of 1765 and weighs 10,000 (on paper) Everybody sez I need to figure 25% of the weight for the pin.
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Old 10-13-2015, 02:02 PM   #6 (permalink)
diesail
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Tires are your limiting factor. The rear axle in a 2500 is the same as a 3500 on the Dmax trucks. If you are running a 265/75R16 then the tire should be rated to carry 3415# if you are running a 245/75R16 then they are rated for 3042# each. This will give you a rear axle capacity of 6830# or 6084#. So depending on tire you have 3930# or 3184# to play with.
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Old 10-13-2015, 05:42 PM   #7 (permalink)
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I have 265/75R16 and are marked at 3415 load capacity. As best I can determine, the rear axles are rated at 6084 lbs. Wouldn't my absolute maximum weight I can put in the bed be limited to 6084 also?
The camper guy is telling me with an advertised pin weight of 1765, the most I'd have on the pin is 2100 even if I put 1500 of stuff in the camper. It sounds logical if 25% of that 1500 was carried by the pin.
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Old 10-13-2015, 05:52 PM   #8 (permalink)
diesail
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Quote:
Originally Posted by grassmaster View Post
I have 265/75R16 and are marked at 3415 load capacity. As best I can determine, the rear axles are rated at 6084 lbs. Wouldn't my absolute maximum weight I can put in the bed be limited to 6084 also?
The camper guy is telling me with an advertised pin weight of 1765, the most I'd have on the pin is 2100 even if I put 1500 of stuff in the camper. It sounds logical if 25% of that 1500 was carried by the pin.
I am assuming that this is a Dmax with an AMM 11.5 axle that they came standard with, in which case the axle is rated for something stupid like 10k. Are you coming up with that 6084# number from the door sticker? If so I bet it also says 245/75R16 for the tires, in which case that number comes from the tire rating. Since you are running the larger tires you can bump it up to the capacity of the tires.
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Last edited by diesail; 10-13-2015 at 05:54 PM.
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Old 10-13-2015, 08:25 PM   #9 (permalink)
grassmaster
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The 6084 axle rating is what I found on the internet. The axles are standard that came on the truck. If I'm hearing you correctly, the 265 tires at 3415 (times 2) is the hard number I don't want to exceed.
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Old 10-14-2015, 09:10 AM   #10 (permalink)
Tom S.
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Quote:
Originally Posted by grassmaster View Post
2500 lbs of pin weight is a worse case. Seems that the rear axle rating is just north of 6,000. the weight of the rear truck is 2900 with me (at 200) and roughly a full tank of gas. I would add another 200 to this. Based on the axle rating, I have about 2,900 lbs to play with.
The camper I'm looking at is advertised to have a pin weight of 1765 and weighs 10,000 (on paper) Everybody sez I need to figure 25% of the weight for the pin.
The 25% figure is an old guesstimate based on trailers 30 years ago, and I suspect with 5th wheels today, 20% is probably more accurate. Of course everything also depends on your loading. That's why every 5th wheel has their water tank in the rear, to actually lighten the pin when the tank is full.

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