1. Gooseneck Trailer Coupler
  2. Redline
  3. Coupler with Outer and Inner Tube
  4. 24000 lbs GTW
  5. Round Tube
  6. 2-5/16 Inch Gooseneck Ball
Round Gooseneck Coupler with 28" - 38" Adjustable Height - 24,000 lbs

Round Gooseneck Coupler with 28" - 38" Adjustable Height - 24,000 lbs

Item # SAC2516-I
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Gooseneck Trailer Coupler
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SAC2516-I - 24000 lbs GTW Redline Gooseneck Trailer Coupler
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Round gooseneck coupler fits 2-5/16" ball and has an adjustable height to match your application. Heavy-duty construction and an easy-to-grip handle make this coupler durable and simple to use. Call 800-298-8924 to order Redline gooseneck trailer coupler part number SAC2516-I or order online at etrailer.com. Free expert support on all Redline products. Guaranteed Lowest Price and Fastest Shipping for Round Gooseneck Coupler with 28" - 38" Adjustable Height - 24,000 lbs. Gooseneck Trailer Coupler reviews from real customers.
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  • Reviews (5)
  • Q & A (4)
  • Videos (1)
  • Photos
  • Why etrailer?

Redline Gooseneck Trailer Coupler - SAC2516-I

  • Coupler with Outer and Inner Tube
  • 24000 lbs GTW
  • Round Tube
  • Redline
  • 2-5/16 Inch Gooseneck Ball
  • Manual Latch

Round gooseneck coupler fits 2-5/16" ball and has an adjustable height to match your application. Heavy-duty construction and an easy-to-grip handle make this coupler durable and simple to use.


  • Adjustable so that you can match coupler height to application
    • Outer tube welds onto trailer
    • Inner tube slides up or down for proper positioning on tow vehicle
    • 2 Set screws (included) secure inner tube at desired height
  • Durable, heavy-duty, cast steel construction
    • Cone-shaped bottom plate provides additional strength
    • Handle is easy to grip


  • Ball size: 2-5/16"
  • Retracted height: 28"
  • Extended height: 38"
  • Outer tubing: 4-1/2" outer diameter
  • Inner tubing: 4" outer diameter
  • Capacity: 24,000 lbs

SAC2516-I Round, Adjustable Gooseneck Coupler with Set Screws - 24,000 lbs

Video of Round Gooseneck Coupler with 28" - 38" Adjustable Height - 24,000 lbs

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Redline Gooseneck Coupler Review

Randy: Hey guys, Randy here at etrailer.com. Today we're taking a look at a 2 and 5/16 inch gooseneck coupler. Now this is a 4 inch round classified couplet. Basically, it's gonna slide into your outer tube, or it also comes with a replacement outer tube that you can weld onto a trailer. It's gonna be more if you're doing repairs, replacements, things like that. Now this coupler will be a good replacement for just about any style of gooseneck trailer.

There's a few slight differences in this one compared to some of the other ones.This portion on standard gooseneck couplers, is just 4 inch round all the way down. This one is a little bit more rust. It appears to be a little bit more sturdy. This is, kind of matches your outer tube there a little bit more. Generally, we'll see them a little bit smaller.

I also like how nice and thick that our plate is down here. Generally, they're going to be about half that size on some of the other couplers. So really has that good, sturdy appearance.The overall build quality on it is good. The welds all look nice. There's a little bit of slag here and there on it, you can see.

But it is an unpainted coupler. You're going to have it sandblasted and painted anyway to match your trailer. So really not a big deal. Most of that's going to come off for you.I also like the handle. It's got a nice, large open design.

See we pull that up, rotate it. That's going to allow our capture plate there on the bottom to come back and you'll notice that's spring loaded. I like that feature. As our ball comes up into it, the plate's going to move out of the way. Once it gets all the way down, it'll come back in position and it's going to align that pinhole for us each time. So at that point, we just have to rotate our handle over. You can see it's going to go right down in position. That'll save us a little bit of that trouble of trying to move this plate back and forth and getting it lined up.Now another slight difference with this coupler over some of the other couplers. Some of them are designed this way. Some of them are designed to where they have a pin that goes through. Now I like them without the pin more. That gives us more adjustability. We're not relying on those holes to pass the pin through to get it set. And we haven't had any issues with these moving down or moving up with just the set bolt securing it. So you're going to be in good shape there.Another feature that's really helpful is the slight taper that we've got here around the ball opening. Basically if we're not dead center and we try to hook up, it's going to help to position that ball in the right place for us.The next question that we always get is would you buy that coupler Is that something you'd put on your trailer And if I was looking for just basic necessity, just to have a coupler on my trailer, I would. It's going to give us the standard gooseneck ride though. If you haul often, if you maybe haul livestock, you haul horses, or you've got living quarters in your gooseneck, I would go with the CG, the Convert-A-Ball Cushioned Gooseneck. Gives you a really drastically improved ride quality, to make things a lot more comfortable in the truck and the trailer. But if you're just hauling this from one side of the farm to the other side with hay on it, I think this is going to be a very good solution.Now to get the coupler connected to your gooseneck ball. Before we back the truck in and under, I always like to get this handle up and released so that auto latch or that spring-loaded flap will be able to operate. We'll just get the truck backed in underneath.Now we'll lower it down on and you'll see that bevel on the bottom helps to center it up, even if we don't have it dead center underneath our coupler. Once we've got it down and on there, all we do have to do is pull our pin latch there. Once we make the rest of our connections, we're gonna be ready to hit the road.Now to begin your installation, that's going to depend on what type of trailer set up you've currently got. If you're rebuilding, restoring or repairing. Of course, you're going to need to weld on the outer tube that's going to come with it. Now as you can see, these are all just about standard in length here. Our older coupler or the older outer tube we have here has a single set bolt. This is going to have two. Now that'll just be welded on. You can see it's an unfinished material so you don't have to worry about a bunch of grinding on it.The one thing to keep in mind. All gooseneck outer tubes generally have this plate welded on the top. That's going to prevent moisture from getting down in there. And really all of the replacement outer tubes don't have that. So I strongly recommend that you do have a plate welded on there just to keep out that moisture. On these set bolts, you can see they're a squared head. That's going to be a little bit different than what we see on some of the other couplers. This for a wrench to go on the outside, you'll need a 19 millimeter. And then for your final torque, we found that a 21 millimeter, 12 point socket will go on there and allow you to torque that down. And then your set bolts are going to be pretty standard. Just the inch and an eighth box and wrench. You can get those set down, or the jam nuts, you can get them jammed down so those bolts won't back out.Now as far as the inner tube goes, whether you're using your existing outer tube or new outer tube, we're going to get this slid up and in. Before you remove your old one, you'll want to measure to the bottom of it to see how far off the ground that is. We're going to match our new coupler height to that and then since we're using more of a standard set up here, it's going to be an inch and an eighth wrench to get that set. We're going to have our torque wrench, torque that down properly, then we can run down that jam nut.All right, at that point, you're going to be ready for use.

Customer Reviews

Round Gooseneck Coupler with 28" - 38" Adjustable Height - 24,000 lbs - SAC2516-I

Average Customer Rating:  5.0 out of 5 stars   (5 Customer Reviews)

Round gooseneck coupler fits 2-5/16" ball and has an adjustable height to match your application. Heavy-duty construction and an easy-to-grip handle make this coupler durable and simple to use.

- SAC2516-I

Works great on my tilt bed gooseneck tr ailer. 707166

- SAC2516-I

Works great, is everything I expected 321433

It is working great, could not ask for anything more for the money
Ray - 12/02/2017


- SAC2516-I

great to do business with one of the good ones on the net Thanks Alva 161456

working great for us Thanks again
Alva H - 11/25/2015


- SAC2516-I

Quality built and heavy duty 139466

- SAC2516-I

Quality service & product. 137847


Ask the Experts about this Redline Gooseneck Trailer Coupler

  • Recommended Adapter With Offset For Gooseneck Car Hauler Trailer
    If you have a 4-inch outer tube on your gooseneck I have a solution for you. I recommend the B&W Extend-A-Goose Gooseneck Coupler, part # BWTEXA4200. This adapter will fit inside the 4-inch outer tube and gives you 10-inches of offset as well as 8-inches of vertical adjustment. This has a weight capacity of 24,000-lbs and a vertical load limit of 6,000-lbs.
    view full answer...
  • Installation of Redline Round Gooseneck Coupler SAC2516-I
    We do not recommended drilling the Redline Round Gooseneck Coupler # SAC2516-I. Since this unit has two set bolts, each with a locking nut, you do not have to worry about the coupler suddenly dropping down to its minimum height. So long as you appropriately tighten the bolts and lock nuts you should be just fine. And a big thank you for your many prior purchases from etrailer!
    view full answer...
  • Can Nose of 1988 Bee Horse Trailer be Lowered to Allow Trailer to Tow Level
    Thanks for the picture. Yeah you are very nose high and need to get the trailer sitting level. It's hard to tell in the picture but is the gooseneck coupler adjustable? You should see some set screws on the side of the tube that would allow you to raise the tube in the trailer and allow the nose to come down on the trailer. You aren't going to be able to fit a large enough tire to offset the height difference. The coupler of the trailer needs to adjust or you should replace it with one...
    view full answer...
  • Will the B&W Extend-A-Goose Coupler Fit a Vertical 4” Square Coupler
    To be able to use the B&W Extend-A-Goose Gooseneck Coupler # BWTEXA4200 you will need a round gooseneck coupler. Your square coupler will not be compatible. You can use the Redline Gooseneck Coupler # SAC2516-I to replace your square gooseneck coupler. This will be compatible with the B&W Extend-A-Goose. It comes with an Inner and Outer tube so you will replace the Inner tube with the B&W Extend-A-Goose. This will require welding. I recommend hiring a professional welder who has done...
    view full answer...

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Info for this part was:

Expert Research:
Jameson C
Expert Research:
Adam R
Expert Research:
Jeffrey L
Installed by:
Randy B
Video Edited:
Chris R
Video by:
Zach D

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