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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

Our Price: $165.37
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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 1-800-496-5010 for expert service.
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  • Reviews (201)
  • Q & A (0)
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  • Why etrailer?

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 Satisfaction Score:

Customer Reviews

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

Average Customer Rating:  4.8 out of 5 stars   (201 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?

Dean - 10/05/2022


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


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


The extension ball has worked very well on our F250 with a 6 1/2 foot bed. Been in a few tight turns and it allowed the 5th wheel to turn.


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!


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.


This did exactly what I wanted. F-350 long bed, needed to move the trailer connection back just a bit so I could drop the tail gate down while connected. Also, now have enough room to line up and hook up without having to get out and close the tailgate to finish hooking up the trailer.


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...


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


Perfect for my goosebox converted 5th w heel.


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


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.


heavy duty


good product. 2nd one i have had for short bed trucks


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.


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.


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.


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!


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


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


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


Works perfectly!!!


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


Easy to order!

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