What is Difference Between Overslung and Underslung Trailer Coupler

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Question:

What is the difference between overslung and underslung?

asked by: Mike P

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Expert Reply:

An underslung trailer coupler is one that attaches to the bottom of the trailer frame and an overslung one is one that attaches to the top of the frame.

The Replacement Head for Blue Ox SwayPro Weight Distribution Systems part # BXW4011 is for trailers with an overslung mounted trailer coupler like part # CA-5400-B whereas the Replacement Head for Blue Ox SwayPro Weight Distribution Systems part # BXW4012 is for trailers with an underslung mounted trailer coupler like part # CA-5335-B.

expert reply by: Jameson C

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Answer 1

An underslung trailer coupler is one that attaches to the bottom of the trailer frame and an overslung one is one that attaches to the top of the frame. Measuring is not required if you just take a look at your coupler and see where it attaches to…

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Answer 2

Hey Ron, thanks for reaching out! Your 2012 Airstream Flying Cloud 27FB has a GVWR of 7,600 lbs so your current 15K weight distribution could be rated a bit high for your trailer. The Blue Ox SwayPro 15K #BXW1500 has a tongue weight range of 1,000…

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Answer 3

The best way to determine what system will work for you is to know what your total tongue weight is. The total tongue weight is the tongue weight of your fully-loaded-ready-to-tow trailer added to the weight of any cargo you place behind the rear…

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Answer 4

To select the correct B&W Continuum Weight Distribution System for your needs you will first need to determine if you have a standard coupler(mounts on top of trailer frame rails) or an underslung coupler(mounts on the bottom of the trailer frame…

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Answer 5

The B&W Continuum Weight Distribution System part #BW78FR requires at least 24" of space on the frame directly behind the coupler and along the side a few inches back from there. This works with most trailers but for some it will not and,…

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Answer 6

I would check first to see if you do have brake flanges before going forward buying parts because if you do that would make it pretty easy. Otherwise you could look into having flanges welded on as that's an option too. We have them with part…

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Answer 7

There is a good way for you to further stabilize your travel trailer and reduce sway. And since you already use a weight distribution hitch, and your Ram has Timbrens, the best option is going to be adding helper springs to your trailer. First,…

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Answer 8

An EZ lube spindle will be better because it allows you to insert grease from inside the spindle where the bearings are and push out the old grease whereas with a Bearing Buddy you basically just get to push grease through the front of the hub. I…

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Answer 9

Potentially. The B&W Continuum Weight Distribution System #BW78FR will work for trailers with a tongue weight between 600 lbs and 1,600 lbs. Without knowing the exact model or floorplan of your Jayco camper I really can't say if it will work…

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Answer 10

With your tongue weight at 1,175 lbs when loaded, you also need to account for any cargo weight behind the rear axle as well to get the total tongue weight rating. I've attached an article to assist. You are correct that your current system is…

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Answer 11

I looked in our system and i see you have a ordered previously the 1500lbs bars. If the system is setup correctly, and is not damaged or worn then something else is wrong. You may need to check the tongue and trailer weights again and make sure you…

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Answer 12

The B&W Tow & Stow 2-Ball Mount #BWTS20037B referenced in your question features a 18,000 pound towing capacity when used with the 2-5/16 inch ball so it certainly has the capacity needed to tow a 13,500 pound trailer. This is designed to fit…

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What is Difference Between Overslung and Underslung Trailer Coupler

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