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Old 03-22-2015, 07:23 PM   #43
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Originally Posted by bonginator View Post
Make sure you also know the payload limit of your truck. The tongue weight of the trailer will consume part of it.


The payload is 1,380 lb with 20" wheels and 1,420 lb with 17" wheels & tires. True
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Old 03-22-2015, 07:58 PM   #44
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The payload is 1,380 lb with 20" wheels and 1,420 lb with 17" wheels & tires. True
Don't forget to subtract tongue weight of loaded trailer, passengers, gear in truck, accessories, and fuel from that number.
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Old 03-22-2015, 08:06 PM   #45
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It's several fold... The 20" tires have less payload since there is less sidewall on the tire - also 20" runs and tires weigh more than 17" wheels and tires - thus decreasing your payload. In addition to having the correct hitch setup... Many manufactures offer a towing package - HD teams cooler, stiffer suspension, different rear end ratio - so swapping gears is not always affordable - but you can add in an aftermarket or OEM transcooler and change to HD adjustable shocks for a better towing experience. I would still consider moving to 17 or 18 inch rims for ride control as well.
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Old 03-22-2015, 08:07 PM   #46
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You know after checking the towing specifications for the 2010, which is the exact same truck as 2009. I am not worried at all. They just revised all the numbers upward, same truck.
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Old 03-22-2015, 08:28 PM   #47
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Sounds like you are good to go. When do you pick up your new AS? Keep us posted on how it tows?

Also, just curious which WD hitch you are planning to use?
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Old 03-22-2015, 08:36 PM   #48
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Sounds like you are good to go. When do you pick up your new AS? Keep us posted on how it tows?

Also, just curious which WD hitch you are planning to use?
The dealer is supplying it, I don't know.
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Old 03-22-2015, 09:21 PM   #49
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The dealer is supplying it, I don't know.
Knowing what hitch you'll be using is as important, if not more important, than getting your weight right. A badly set up hitch, or a poor hitch, can cause you a lot more issues than being over the weight limit by a few pounds.

I would ask.
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Old 03-22-2015, 09:25 PM   #50
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The moment arm from the center of the driving axle to the point where the rubber meets the road could be greater on a 20 inch wheel/tire than a 17 or 18 inch. The rear end ratio and the number and type of gears can also impact your situation. Most vehicles wth at least a 3.54 rear end are going to be pretty capable. In my case with a Toyota Tundra with a 4.10 rear end, a six speed automatic transmission and 5.7 liter engine it can (has slowly) pulled the space shuttle. I think you are going to be just fine. You might go slower up the mountains, but not traveling at an unsafe speed. Although I would not recommend busting the recommended specs, remember they are established with a safety factor that is usually pretty conservative. The fact that the follow-on year truck with the same rear end, etc. has a higher rating appears to be testimony to the thought that Dodge decided they were too conservative on your year ratings. Of course this assumes the rest of the setup is the same.
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Old 03-22-2015, 09:29 PM   #51
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The moment arm from the center of the driving axle to the point where the rubber meets the road could be greater on a 20 inch wheel/tire than a 17 or 18 inch. The rear end ratio and the number and type of gears can also impact your situation. Most vehicles wth at least a 3.54 rear end are going to be pretty capable. In my case with a Toyota Tundra with a 4.10 rear end, a six speed automatic transmission and 5.7 liter engine it can (has slowly) pulled the space shuttle. I think you are going to be just fine. You might go slower up the mountains, but not traveling at an unsafe speed. Although I would not recommend busting the recommended specs, remember they are established with a safety factor that is usually pretty conservative. The fact that the follow-on year truck with the same rear end, etc. has a higher rating appears to be testimony to the thought that Dodge decided they were too conservative on your year ratings. Of course this assumes the rest of the setup is the same.


Airstreams seem to have very much in common with the space shuttle as in regards to the price being nearly the same.
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Old 03-22-2015, 10:22 PM   #52
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Its not the wheel size that matters. It is the overall DIAMETER of the tire that will change things.
You have plenty of truck. Have fun with it.
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Old 03-23-2015, 08:30 AM   #53
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Don't worry about it. Smaller wheels would be better, but...
I tow a Classic 30 with a Tundra with 20" P-rated tires. You cannot get Load Range E tires in the specific size 20's I have. You can get Load Range E 17's or 18's. I am starting my 6th season towing with the 20's. I have covered from Texas to Ohio to Florida to Mississippi with no trouble.
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Old 03-23-2015, 09:56 AM   #54
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Also, remember that the cargo capacity on the door jamb sticker assumes a full tank of fuel and a175 lb. driver. So don't count that against your cargo limit when figuring out whether your load is within limits (unless, of course, you have added a larger, aftermarket fuel tank.)
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Old 03-23-2015, 10:53 AM   #55
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Quit wirring you have a good set up, go enjoy it.....
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Old 03-24-2015, 03:37 PM   #56
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Tire size will effect towing ability just like gearing ratio of the ring and pinion.
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