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

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

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Trailer Hitch Ball
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Shipping Weight: 19 lbs
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4" Offset Ball for B&W Turnoverball Gooseneck Trailer Hitches 20000 lbs GTW BWGNXA4085
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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. Lowest 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 or call 1-833-496-1390 for expert service.
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  • Reviews (181)
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B and W Trailer Hitch Ball

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

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.


  • 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


  • 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"


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

Item # BWGNXA4085

California residents: click here

Customer Reviews

4" Offset Ball for B&W Turnoverball Gooseneck Trailer Hitches - BWGNXA4085

Average Customer Rating:  4.8 out of 5 stars   (181 Customer Reviews)

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.


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?


This hitch extender fit in perfectly. The height and 4 inches of movement really helped the gooseneck trailer to have more clearance. Thank you etrailer for having this BW 4 inch extension.

The BnW hitch extender is working great. Perfect fit.
Martin - 07/07/2022


This works absolutely perfect in a Ram 3500 with 6 1/2 ft bed, and the Gen Y gooseball hitch.
I think if more people knew of this combination, the fifth wheel style hitch, Anderson hitch and others would become obsolete.
Get to your destination, disconnect, pull out the ball, and the bed of your truck is free!


this offset ball has helped towing my fifth wheel, keeping it away from the truck cab when turning or backing tight. I would highly recommend this.

Has been extremely great
Carlos G - 01/16/2022
A year has passed, and I rely and enjoy using this product, I never tow without it. For those campers that doubt their tight turns and backing maneuvers, this product will put you at ease.
Carlos G - 01/17/2022


Used with Ram 2500 short bed . Great product, works perfect. The offset allows cab and tool box clearance while pulling our 5th wheel camper. I have used etrailer with other purchases . They have always delivered on time and have provided good customer service. Thanks etrailer


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

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.
-- Etrailer Expert Sierra K - 03/17/2021


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.


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...


Have an older 5th wheel style camper with a hitch adaptor, that coupled with newer style pickup boxes caused the camper to be to close to the box. This hitch helped a fair bit. It set the camper 1" higher off the box and 4" back to give more space between the bumper and camper which helps when hooking up.


Quality construction, fits perfectly. I needed as much clearance as possible after installing a sleeper cab on my Ram 3500. I utilized this as well as the B&W extenda-goose coupler which collectively made sharp turns easier.


Installing it on a 2016 Ram 2500 diesel crew cab swb with factory puck prep. Changed the factory goose ball out to a B&W turnoverball. Have not got to use it yet, but I am going to change to a Reese goosebox hitch on my 5th wheel


purchased for my son as a Christmas gift in 2020. He told me what to get and where to order from. The order process was easy and shipping was fast. He has been happy with this hitch.


Hitch arrived on time and exactly as advertised. Customer service at is superb and one of the reasons they are my "go to" vendor for parts for my truck and horse trailer. Follow-up and communication is exemplary. Pamela in Customer Service ... way to go, girl! You're tops!


Exactly as ordered.

Works perfect.
Chester - 07/15/2022


I have a 2005 F 250 crew cab short box. I changed from a 5th wheel for simplicity and ease of switching from a trailer to a slide in camper. So, this is all I have to remove in order to be able to put the camper on. I am getting older and this is just enough weight to carry around. The offset is perfect to jackknife the trailer. The towing with this set up is way better than the fifth wheel. Way more solid feeling and no clunking. I should have done this years ago.

Excellent. Like it - Will never go back to a fifth wheel.
Jim - 11/04/2018


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.


Haven’t used it yet. Trying to get a little more turning clearance with my fifth wheel.


Product works as it should. Well built and needed for short bed trucks!!


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!


works great helps with the short bed


Strongly built and helps provide needed clearance.


Great product. Just used it on a 100 mile trip. So glad I got it.


The off set ball works great for my 2008 Dodge Ram 3500 Mega Cab. I converted from a rail mounted sliding fifth wheel to a B&W hidden goose neck hitch. With the short bed, I was concerned about turning too short and the trailer hitting the truck cab. I have been able to make some very tight turns with no issues.


Works Great! Wish they made one with a 6” set back. Ford moved the rear axle back from bed center at some point. On my 2016 350 dally it is. This makes backing goose neck up strange and hard with center ball. It reverses the action on trailer until you over come center which takes a lot of swing. Not good in tight places. 6” or 8” would be awesome and may improve ride and steering.


Very nice, well made product. Just installed it today along with the Reese Goosebox on my Montana 5th wheel being towed with a 2015 Dodge 3500 Megacab (shortbed). Between the dually with rear air adjustable suspension, the new Gen. 2 Goose Box and the offset tows amazingly well. Gonna test out the turning capability tomorrow to see how the offset works with my RV set up as it is.
NOTE: DO NOT be mislead by the description of the offset ball specified for Dodge Ram (model BWGNXA4685). I was told by customer service at B&W that model is for 1500 Rams ONLY. The hole spacing is different for 2500 and 3500 and the B&W hitch that they use apparently. Great customer service as usual when I had to exchange the 4685 for the 4605 that I am now using.

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