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  1. Trailer Hitch Ball
  2. B and W
  3. Gooseneck Hitch Ball
  4. 2-5/16 Inch Diameter Ball
  5. Offset Ball
  6. 20000 lbs GTW
4" Offset Ball for B&W Turnoverball Gooseneck Trailer Hitches
B and W

4" Offset Ball for B&W Turnoverball Gooseneck Trailer Hitches

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$174.66
Trailer Hitch Ball
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Designed for use with B&W's Turnoverball gooseneck hitch, this ball extender moves the pivot point of your trailer 4" rearward to provide additional cab clearance. Great Prices for the best trailer hitch ball from B and W. 4" Offset Ball for B&W Turnoverball Gooseneck Trailer Hitches part number BWGNXA4085 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (381)
  • Q & A (0)
  • Photos

B and W Trailer Hitch Ball

  • Gooseneck Hitch Ball
  • 2-5/16 Inch Diameter Ball
  • Offset Ball
  • 20000 lbs GTW
  • Coated Steel
  • B and W

Designed for use with B&W's Turnoverball gooseneck hitch, this ball extender moves the pivot point of your trailer 4" rearward to provide additional cab clearance.


Features:

  • Extension provides 4" of additional space between your truck's cab and your gooseneck trailer
  • Works with all B&W Turnoverball gooseneck trailer hitches except for the following:
    • For Toyota Tundra applications use BWGNXA4585
    • For Dodge Ram 1500 applications use BWGNXA4685
  • Square ball base prevents ball from turning in hitch during hookup
  • Powder coated steel resists corrosion
  • Made in the USA


Specs:

  • Ball size: 2-5/16"
  • Offset: 4"
  • Weight capacity: 20,000 lbs
  • Vertical load limit: 5,000 lbs
  • Distance from center of locking pin hole to bottom of square base: 2"


4


GNXA4085 B and W Turn Over Ball Gooseneck 4" Hitch Ball Extender

Item # BWGNXA4085





Customer Satisfaction Score:

Ratings & Reviews

4.8

381 reviews
Review sort icon
Designed for use with B&W's Turnoverball gooseneck hitch, this ball extender moves the pivot point of your trailer 4" rearward to provide additional cab clearance.

by:

The 4” offset adds better balance at the same time provides adequate clearance between nose of trailer and cab . Thanks

Michael profile picture

Michael

7/25/2025

Excellent product



by:

Great product, and perfect fit. Gave me the perfect offset that I needed to keep my trailer from hitting the cab. Highly recommend if you have a short wheel base truck and pulling a deck over gooseneck trailer!



by:

I haven’t used it yet, I am concerned about it being about 3/4” off the bed. I am thinking about pupping a spacer between it and the bed. Worried about it bending

Sierra K. profile picture

Sierra K.

3/17/2021

Thanks for your review. This gap is normal since it fits a few different vehicles. It is safe and should not bend. You can put a washer there for peace of mind, but as long as you do not go over the weight capacity, it is not necessary.



by:

This product works great for short bed truck. This product gives you more turning radius with out knocking your back window out.
Truck is a 2500 Ram, pulling 42ft gooseneck.



by:

Hi Adam
The hitch works flawlessly. No
Jinking sloppy movements at all. With the Gen-Y Gooseneck coupled to the Curt Crosswing 20k hitch. This is a winning combination. I have Montana 40ft fifth wheel weighing close to 15k loaded, it pulls like a dream. I can drive with one hand if a want to. I have Ram 3500 Mega Cab. The offset Ball set it back enough to clear Cab with room to spare. I recommend this combination to make towing effortless.
I also have to say that the people like Adam & other staff working with me lead me in the right direction. These guys know what their are doing. Thx etrailer for all your help. Thx Adam....Robert ::::))))



by:

Works as advertised arrived when it wast



by:

The ball was shipped in a very timely fashion. Box was a little smashed but not your problem.



by:

Ordered this ball for the "what if" cases for our GMC Sierra 2500. Only had to use it once for a hard back in. Glad we had it!



by:

Works as expected. Great quality.



by:

Fast shipping... The B&W 4in extension hitch ball is really good. I have used it a couple of times works great wish I had gotten one sooner. Problem I had was in a newer 2500hd the gooseneck was to close to toolbox and really close to rear window. With this extender ball problem is solved...



by:

Great addition to add if you have a standard box with a tri-fold tonneau cover and want to keep the cover on vs taking it off every time you pull your gooseneck trailer!



by:

High Quality, Heavy duty 4” offset ball mount that works perfectly with the B&W turnover gooseneck hitch system. Adapted my 30’’ fifth wheel trailer with the Ranch regular gooseneck adapter—now no more heavy lifting and lots more room in the truck bed.



by:

I have used this offset ball in the B&W gooseneck hitch I installed in my regular box 2022 Chevy 3500 to tow our 13K GVWR fifth wheel with Reese Goosebox for over six months now and I love it! The offset ball combined with the placement of the hitch in a 2020+ Chevy means I can turn a full 90 degrees if necessary. And fully loaded, our truck is still within specs on all weight ratings, including rear axle weight.



by:

I bought this to move hitch weight forward 4" so I reversed the described installation. This is because on my 2024 Sierra 2500 the B&W (and factory) hitch connection to ball is behind the axle by roughly the offset.



by:

That extended ball worked great. Really helped getting my stock trailer into a better spot for the truck!



by:

Very heavy duty! Handles my 5th wheel well.



by:

Great service, fast shipping, what more could you want.



by:

We love it. Gave us the perfect space to safely open our tailgate and the camper is sitting at a perfect height from the sides of the truck bed



by:

Works great. Gave me some extra turn radius with our new 5th wheel. Had some issues with shipping and Neil was on it right away and credited me back the cost I paid for the expedited shipping.



by:

This product is exactly what I needed to offset our new “Reese Goose-box” pin box to better accommodate the clearance for the fuel tank and tool box in the bed of our truck. Thanks to the knowledge of the “etrailer” staff (specifically Stacy) she went the extra mile, taking additional time to assure all the products I needed were perfect for my application. Thank you Stacy for all your assistance and patience with my order.
P.S. I added the yellow strip down the center of the pin box to help guide me when hooking up. Perhaps “Reese” will add this little idea to their future pin boxes as an option?

Dean profile picture

Dean

10/5/2022

Great

Dean profile picture

Dean

6/13/2023

This product works great and allows so much more usable room in the bed than our previous 5th wheel hitch which, was becoming too heavy to remove frequently when needing to haul materials.

Mike L. profile picture
Etrailer Expert

Mike L.

9/6/2023

@Dean We're happy to hear that the # BWGNXA4085 offset gooseneck ball is working well for you.


by:

Works exactly as I need it to. Having a 38 ft, 96" wide goose neck Keystone Cougar trailer and a RAM 2500 with 6'4" bed, I needed offset on my hitch for safety purposes.

I have a few thousand miles of travel using this setup and it works fantastic. I spray on a dry lube before every use but have had most of the protective coating on the ball come off, which is what I expect to happen with heavy use.

I would would buy again, if needed, but I expect years more use out of this BAll.

Jedediah profile picture

Jedediah

10/6/2025

After thousands of additional miles, Im still absolutely thrilled with this offset hitch! As a follow-up to my previous review, and after even more frequent and heavier usage towing my gooseneck camping trailer, I can confidently say its been a game-changer. The performance remains flawless, consistently exceeding my expectations under these more demanding conditions. To further enhance the towing experience over the past year, I added the Air Lift LoadLifter 5000 Ultimate Rear Air Helper Springs ITEM AL88289, which complement the hitch perfectly and provide added stability. In fact, Im so impressed with this hitch that I fully expect to continue using it for years to come, even when the time comes to purchase future trailers. It just works that well, giving me the confidence and stability I need for safe and comfortable towing.



by:

Got the offset hitch ball I ordered



by:

I’ve only towed with it once, but it gives the extra turning room that is needed. I can almost get to 90 in my 25 F250 short bed. It also creates more room in the bed for getting in and connecting the safety chains.
One small negative is that the amount of bounce and chucking is slightly increased due to the hitch now being behind the axel.
Something that will hopefully fixed easily by installing Timbren bump stops to give more support.



by:

Very well built, definitely heavy duty! The only issue for me is because its lifted above the floor a little my Pullright 5th wheel companion hitch won’t tighten down without shimming the hitch up. I don’t like using wood under it but, I’ll try it.

Lazer S. profile picture
Etrailer Expert

Lazer S.

10/28/2025

Glad you like it, Elton! Well, other than having to use shims, of course. This can lift things up a bit so I do hear people say they need to shim them in one way or another. I would go with some hard rubber though. I don't remember what it is called, but you can get it at pretty much any hardware store. I have a bunch of it in my garage and basement to protect the cement floor. I think you can even get it cut to size. It's 1" thick and is super durable. I think it would hold up better than wood.



by:

Ball works great. No flex or bounce with the offset, it’s rock solid. I’m an owner/operator trucker with 34 years hauling all sorts of equipment. I’ve got lots of experience with every kind of hitch and trailer setup and this one is top notch. For anyone thinking of buying one of those cheap China knockoffs from another website, don’t do it!!! It’s not worth the risk or liability if you loose your trailer in transit. This hitch ball it’s professionally engineered and tested and worth every penny!!


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See what our Experts say about this B and W Trailer Hitch Ball

  • What 5th Wheel to Gooseneck Adapter Hitch do I Need for My 2019 Ford F250 with Short Bed?
    Hello Shane, Great question, and I am going to need you pin box number to ensure we are getting you the right part number. If you are unsure of your pin box number, please feel free to send me the information off of the sticker on your current Pin Box so I can get it from Lippert. Since your 2019 F250 is a short bed you are definitely going to need an offset. The Shocker 5th Wheel to Gooseneck Pinbox for Lippert 1621/0719 and Rhino Box - 24K GTW - 6K TW # SHK23MR has a 3" offset. I attached...
    view full answer...
  • Comparing Reese Goose Box Pin Box to Andersen Ultimate for Ram 3500 Short Bed Turning Clearances
    The Reese Goose Box 5th-Wheel-to-Gooseneck Air Ride Coupler Adapter # RP94720 for Lippert 1621, 1621HD, and 0719 pin boxes will not increase your turning clearances by itself beyond the Andersen Ultimate hitch you have. The distance from the center of the hitch ball coupler to the center of the first row of bolt holes is 17-3/4 inches. The biggest benefit is the air ride suspension along with one less moving part. The only way to increase this is to use an offset hitch ball like the...
    view full answer...
    Image 1 for Image 2 for
  • Can B&W Offset Gooseneck Hitch Ball Work with OEM Puck System on 2021 Ram 3500
    Hey Rudi, thanks for reaching out! I think what you're saying is you have the OEM puck system with the center gooseneck hole installed on your 2021 Ram 3500. If that's the case, then I recommend using the Gen-Y Hitch Gooseneck Trailer Hitch # GY83XR which comes with a 5" offset - the 4" Offset B&W Ball # BWGNXA4085 is designed to only work with the B&W gooseneck hitches like part # BWGNRK1320 that fits your truck. You can replace your OEM puck system with the B&W gooseneck, but I don't...
    view full answer...
  • Does Using an Offset Gooseneck Ball Change where the Pin Weight is Carried in the Truck Bed
    If you were to use the 4 inch offset ball # BWGNXA4085 the pin weight on the ball will not be changed. What will change is where the weight is carried on the truck. Using the offset ball will put more weight 4 inches back from the center of the gooseneck ball hole in the truck bed. This may or may not affect the truck. Some things that could happen include reduced steering and braking and headlights angled upward. If the weight is far enough behind the rear axle it can lift the front...
    view full answer...
  • Can Andersen Ultimate Be Used With Offset Gooseneck Ball?
    Hey Wade, thanks for getting in touch. The Andersen Ultimate Hitch can be used with an offset gooseneck ball. This has been confirmed with Andersen.
    view full answer...
  • Will 4" Offset Ball for B&W Turnoverball Gooseneck Trailer Hitches Fit 2022 Ram 2500
    Hey James! I'm not entirely sure what you're asking here. Do you want to know if you can use the # BWGNXA4085 with the additional height compared to your current ball? This ball is 5-3/4" tall from the base of the truck bed to the top of the ball. This will be approximately 1-3/4" taller than your current ball so the trailer nose will sit a little higher. Unless you're already nose high I don't see this being an issue.
    view full answer...
  • Offset Gooseneck Ball for 2021 Ram 3500 With OEM In Bed Prep
    The Curt Above-Bed Gooseneck Trailer Hitch for Fifth Wheel Rails # 16055 can be used with a set of in bed rails. This will give you a 3" offset. The other option would involve putting an offset adapter on to your gooseneck trailer. Something like the B&W Extend-A-Goose Gooseneck Coupler # BWTEXA4200. If you decide that this is the best option for you let me know what tube size you have on your gooseneck trailer and I will recommend a option for you.
    view full answer...
  • Correct 4" Offset Ball for a B&W Turnoverball Hitch on a 2013 Ford F-150
    No, you'll need a longer one since you have a Ford truck. The correct 4" Offset Ball for B&W Turnoverball on a 2013 Ford F-150 is item # BWGNXA4085. The 4" Offset Ball for B&W Turnoverball Gooseneck Trailer Hitch for Dodge Ram 1500 item # BWGNXA4685 has a significantly shorter tube so it won't reach the locking pin.
    view full answer...
  • Is An Offset Gooseneck Ball Required With A Short Bed Truck?
    Hi Jim! Good call going with the MORryde GooseTech! These work very well and people are really liking them so far. Now to get to your question. Required? No. Recommended? Yes. So what I mean by that is it isn't always a requirement. A lot of 5th wheel campers/trailer have tapered noses these days and you can typically get away with not needing to move the pivot point back. However, doing so will definitely give you more turning clearance and it is almost always something I recommend with...
    view full answer...
  • Compatibility of B&W Gooseneck Hitch and Offset Ball with Andersen Ultimate Hitch on 2018 F-150 5.5
    For your 2018 Ford F-150 with 5.5 foot bed, the B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit # BW77FR is the correct fit. You will want to use the 4 inch offset ball # BWGNXA4085 because the bed is shorter than 6 feet. This offset ball will work with the Andersen Ultimate Hitch but you will still need to be careful with turning clearances due to the short bed and Super Crew Cab. The Andersen hitch will require the shorter 3237 coupler tube in place of the...
    view full answer...
  • Looking For Twist Lock Gooseneck Ball With 4" Offset
    Hey Rich, thanks for reaching out. We do have offset gooseneck balls, but nothing with a twist lock. For example, the B&W 4" offset ball # BWGNXA4085 is for the B&W Turnoverball gooseneck hitch. Or the Curt RockerBall Multi-Fit Ball Kit w/ 4" Offset # C78ZV with OEM gooseneck hitches. Both of these just drop into the gooseneck ball hole. Do you know what brand your gooseneck hitch is? Is it factory or aftermarket?
    view full answer...
  • Gen-Y 5th Wheel To Gooseneck Pin Box Compatibility With A Rhino Box Pin Box
    Hey John, The Gen-Y Hitch 5th Wheel to Gooseneck Pin Box # GY98GR has a matching bolt pattern to your Rhino Box pin box. You will want to check your 5th wheel's pin weight to ensure the 3.5K model is going to be the right capacity though. With a 6.5' bed you're not going to be able to make a 90 degree turn unless your trailer has a really tapered nose. You can, however, use an offset ball to help provide more turning clearance though. These all have specific fits to the gooseneck hitch...
    view full answer...
  • Gooseneck Hitch Fit for 2019 Ram 1500 With 5-1/2 Foot Bed
    There is only one gooseneck hitch that is confirmed to fit your 2019 Ram 1500 with a 5-1/2 foot bed (as of July 2019), the B&W Turnoverball Underbed Gooseneck Trailer Hitch # BWGNRK1319. The cut out of the instructions show where the hitch ball will be when installing this. Since you have a 5-1/2 foot bed you will need the B&W Extend-A-Goose Gooseneck Coupler # BWTEXA4200 which has a 10" offset, in order to give you a way to make a turn with a gooseneck hitch installed. This coupler will...
    view full answer...
    Image 1 for
  • Gooseneck Hitch for 2026 Ram 3500 Big Horn Short Bed
    Hey Rob! You can actually use either one, but my recommendation would be the Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches # BWGNRK1320-5W. B&W makes some of the best hitches available, and the Turnoverball is no exception. Assuming you're using the regular ball, it can be stored upside down in the hitch when not in use. It also allows you to use the Companion # BWRVK3400-5W if you want to use a regular 5th wheel hitch at some point in the future. Not something...
    view full answer...
  • Can a B and W Extend a Goose Goosneck Coupler be Used with a 4 inch Offset Gooseneck Ball
    I spoke with my contact at B and W and was told that the Extend a Goose # BWTEXA4200 and the 4 inch offset ball # BWGNXA4085 can be used together. However, the pivot point of the trailer will still only be 4 inches back from its original position meaning that you will get 4 inches of true offset, not 14.
    view full answer...
  • Underbed Gooseneck Hitch For 2020 Ford F-150 Short Bed
    Hi James; is the 36-gallon tank a factory part and not aftermarket? If so there is an option but for aftermarket tanks I wouldn't be able to verify if there would be interference or not. So as long as your tank is a standard tank on your 2020 Ford F-150, the underbed gooseneck hitch that fits your short bed truck is the following: - B&W Turnoverball Underbed Gooseneck Trailer Hitch # BW77FR I also wanted to mention that since you have a short bed, an offset ball is highly recommended...
    view full answer...
  • What Gooseneck Pin Box do I Need for My 2025 Coachman Brookstone 374RK with 18" Clearance?
    Hello Keith, Wow, that is a really nice 5th wheel, congrats!! The Reese Goose Box # RP59KR is a great choice for replacing the factory Rhino-mount pin box on your 2025 Coachman Brookstone 374RK, particularly because of your need for a front bolt hole to center ball measurement between 16 and 18 inches. The Gen-Y gooseneck pin box designed for the Rhino mount, while heavy-duty, only offers about 14 inches from the front mounting hole to the center of the gooseneck ball. That falls short...
    view full answer...
  • Will Gen-Y Hitch Gooseneck Trailer Hitch Fit B&W Turnoverball
    Hi Brian; the Gen-Y Hitch Gooseneck Trailer Hitch # GY43XR is designed to fit the factory prep package on your 2020 Ford F-350. It is not compatible with your B&W Turnoverball Underbed Gooseneck Trailer Hitch # BWGNRK1116. For an offset ball you can use the 4" Offset Ball for B&W Turnoverball Gooseneck Trailer Hitches # BWGNXA4085. What kind of trailer are you towing?
    view full answer...
  • What Is The Actual Weight Of The B&W Turnoverball Underbed Gooseneck Trailer Hitch BW77FR
    Hey Kevin, thanks for reaching out. The B&W Turnoverball Underbed Gooseneck Trailer Hitch # BW77FR weighs approximately 85 lbs altogether. The 4" offset ball part # BWGNXA4085 weighs 18 lbs. Honestly, I couldn't agree with you more that we should show the product weight on the page. We actually used to list the shipping weight for all our products, but the powers that be decided to do away with that for some reason. If you ever need to know the weight of something just let me know and...
    view full answer...
  • Will B&W Turnoverball Gooseneck Hitch Fit 2019 Ford F-250 With Factory Inner Plates Welded to Frame
    Excellent question and yes, even with the inner plates already welded to the frame of your 2019 Ford F-250 Super Duty, you can still use and install the B&W Turnoverball gooseneck on your truck; the correct fit for your '19 F-250 is the following: - B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit # BWGNRK1116 If you take a look at the cut out of the instructions I added, you can see that you will simply not use the inner side plates that come with the Turnoverball...
    view full answer...
    Image 1 for
  • Will Reese Goose Box Have Short Bed Turning Clearance 2011 F-350
    Hey Richard, since the 2020 Wildcat 290 RL has a tapered nose you can use a Reese Goose Box like the part # RP85FR with a B and W Turnoverball hitch # BWGNRK1111 that fits your 2011 Ford F-250 with the offset ball part # BWGNXA4085 and you'd have really good turning clearance. It's hard to say exactly how sharp of a turn you'd be able to make but I would easily assume pretty close to the full 90. How often do you need to be able to get to 90 degrees?
    view full answer...
  • Will a Reese Goosebox Work w/ a Recessed Well on a CM Flatbed?
    Congrats on the new trailer! You'll be good! We've previously confirmed through Reese that the Reese Goose Box item # RP94716-61301 works great with the recessed gooseneck ball on a CM flatbed so long as you have a 14" x 15" recessed area. Which is what you have and some. An offset gooseneck hitch ball like item # BWGNXA4085 will be absolutely no help with clearance in a recessed well.
    view full answer...
  • What B&W Gooseneck Hitch do I Need for My 2015 Chevy Silverado 2500 with 6 3/4" Bed?
    Hello Stanley, Great question, and I understand your concern when it comes to clearance. Yes, you can install the B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit - 30,000 lbs # BWGNRK1012 in the bed of your 2015 Silverado 2500 6 3/4' bed. To get the extra clearance for your short bed you will also want to get the B&W Turnoverball Gooseneck Trailer Hitches # BWGNXA4085 which will give you a 4" offset resulting in the extra clearance needed for the standard bed....
    view full answer...
  • Can B&W Turnover Ball, Offset Gooseneck Ball & Andersen Ultimate 5th Wheel Connection work Together
    It is perfectly acceptable to use the B&W Turnover ball Gooseneck hitch # BW77FR, and the # BWGNXA4085 offset ball be used with an Andersen Ultimate 5th wheel Connection. The Andersen hitch adapter provides about 8 inches of offset, plus the 4 inches you'll get from the offset ball add up to the same 12 inch offset you'd get from most sliding fifth wheel hitches. I've also confirmed the compatibility with Andersen.
    view full answer...


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