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  1. Trailer Hitch Ball Mount
  2. CURT
  3. Adjustable Ball Mount
  4. Fits 2 Inch Hitch
  5. Drop - 3 Inch
  6. Two Balls
Curt Alumalite Aluminum Adjustable 2-Ball Mount - 2" Hitch - 3-1/2" Drop - 12.5K
CURT

Curt Alumalite Aluminum Adjustable 2-Ball Mount - 2" Hitch - 3-1/2" Drop - 12.5K

Part Number: C28ZJ
In Stock
$319.95
Retail:$420.95
You Save: $101.00
Trailer Hitch Ball Mount
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In Use/Installed

This aluminum, adjustable ball mount lets you tow up to 8,000 lbs with the 2" ball or 12,500 lbs with the 2-5/16" ball. Can be used in a 3-1/2" drop position. Fits 2" x 2" hitch receivers. Great Prices for the best trailer hitch ball mount from CURT. Curt Alumalite Aluminum Adjustable 2-Ball Mount - 2" Hitch - 3-1/2" Drop - 12.5K part number C28ZJ can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (10)
  • Q & A (0)
  • Videos (3)
  • Photos

CURT Trailer Hitch Ball Mount - C28ZJ

Highlights

  • 12,500 lbs GTW with 2-5/16" Ball: Handles heavy trailers like boats, campers, and haulers.
  • 8,000 lbs GTW with 2" Ball: Works for lighter trailers or utility hauls with one mount.
  • Adjustable 3-1/2" Drop for Level Towing: Lets you match different trailer heights easily.
  • Two Polished Steel Balls in One Mount: Switch ball sizes fast without buying extra mounts.
  • Lightweight Billet-Aluminum Build: Cuts hitch weight while staying strong and corrosion resistant.
  • Vibration-Resistant Pins Included: Keeps ball platform secure when adjusted along the shank.

Features to know about

Keeps Your Trailer Level: Adjustable 3-1/2" Drop

Getting your trailer level makes the difference between a smooth, steady haul and a stressful one. The Curt Alumalite Aluminum Adjustable 2-Ball Mount lets you fine-tune the height for different trailers with its 3-1/2" drop and 1" adjustment increments. Slide the ball platform where you need it and secure it with the included pins and vibration-resistant clips to keep things tight and steady on the road.

Handles Heavy Loads: Up to 12,500 lbs GTW

You can trust this mount to handle serious weight. It’s rated for up to 8,000 lbs when using the 2" ball and up to 12,500 lbs when using the 2-5/16" ball, with tongue weights of 800 lbs and 1,250 lbs respectively. Whether you’re moving equipment, campers, or boats, you’ve got the capacity to tow confidently without overloading your setup.

Simplifies Trailer Swaps: Dual Ball Convenience

If you regularly switch between trailers with different coupler sizes, this setup keeps it easy. The dual-ball platform features both a polished 2" ball and a 2-5/16" ball right on the same mount. To change sizes, just pull the pins, rotate the platform, and reinsert—no tools needed. It’s a quick way to get hooked up and rolling again.

Built Strong and Corrosion Resistant: Lightweight Billet Aluminum

The billet-aluminum construction keeps weight down while still being tough enough for serious towing. Aluminum resists rust and corrosion from rain or road grime, so you can leave it in the hitch without worrying about buildup or stuck parts. It’s a clean, low-maintenance design that holds up trip after trip.

Secure Setup Every Time: Uses Included Pins Only

This mount is designed to work safely with the pins Curt provides. Using any other type, like a locking pin, isn’t recommended because it could cause corrosion between stainless and aluminum parts and void your warranty. Stick with the supplied hardware for a secure and worry-free connection every time you tow.

Specs

Application

  • Application: 2" x 2" trailer hitch receivers

Weight and Capacity

  • Gross towing weight: When used with 2" ball: 8,000 lbs
  • Gross towing weight: When used with 2-5/16" ball: 12,500 lbs
  • Tongue weight: When used with 2" ball: 800 lbs
  • Tongue weight: When used with 2-5/16" ball: 1,250 lbs

Dimensions

  • Maximum drop: 3-1/2"
  • Distance between vertical adjustment holes: 1"
  • Pin hole diameter: 5/8"

Warranty

  • Limited lifetime warranty

Note

  • Note: Not intended for use in the rise position.

45364 Curt Alumalite Aluminum Adjustable Trailer Hitch Ball Mount with Dual Ball - 2" Shank - 12.5K

Installation Details C28ZJ Installation instructions



Video of Curt Alumalite Aluminum Adjustable 2-Ball Mount - 2" Hitch - 3-1/2" Drop - 12.5K
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Ultimate Overview of the Curt Alumalite Aluminum Adjustable 2-Ball Mount

Hi, everybody, Andy here with etrailer.com. Let's take a look together at this CURT AlumaLite aluminum adjustable two ball mount for your two inch trailer hitch receiver. This adjustable ball mount is going to slide into your two inch hitch receiver on your vehicle, and give you a maximum towing capacity of 12,500 pounds, and this is going to give you a maximum drop of 3 1/2 inches. Now, the adjustable height is going to let you tow trailers of different heights with the same vehicle. You're just going to slide this ball platform up or down along this shank, and secure it in place with the included pin and clip, and the clip is vibration-resistant, and let me give you a brief demonstration of that. So, I'm gonna go ahead and remove the clip here first.

So, I got that clip removed, and then remove the pin, just like that. And so as you can see, this is going to easily slide up and down the shank with no problems whatsoever. So again, this is going to give you a maximum drop of 3 1/2 inches, so that's going to be the 3 1/2 inch drop there, the maximum drop, and this adjusts in one inch increments. And then when you want to, I have this set on the 2 5/16 inch hitch ball, when you want to change to the two inch ball, it's gonna be as simple as this, just like that. Then let me see if I can remove or replace rather my pin and then a clip.

Just pop that into place. And, I mentioned that these balls here are obviously the two different size. You got the two inch, you got the 2 5/16 inches, inch ball rather. And with the 2 5/16 inch ball you can tow up to 12,500 pounds, with the two inch ball up to 8,000 pounds. The tongue weight on the 2 5/16 inch hitch ball is gonna be 1,250 pounds.

And with the two inch ball it's going to be 800 pounds. These balls are polished steel and so they're gonna be not only good looking but also hold up really well for you. And again, very easy to adjust the drop and change which ball you want to use. This mount itself is constructed of lightweight billet aluminum. So this is very durable.

It's amazing how lightweight it is. It looks like it would be a lot heavier, but I really like the design of it. I really like the build of it. Lightweight, durable, corrosion resistant. It's gonna be very easy to use. And let me give you some other measurements that I took before our time together that might be helpful for you. So measuring from the center of our hitch ball to the center of our first hitch pin hole, it's gonna be about 7 7/8 inches. And then from the center of the hitch, the center of the hitch ball to the center of the second hitch pin hole is about 9 1/8 inches. And then from the center of that second hitch pin hole to the end of the shank, about 1 5/8 inches. I do like the fact that the end of the shank is angled or tapered, so that's gonna make it all the more easier to slide that into your trailer hitch receiver. This does include the pin and clip for the shank and obviously the pin and clip for our ball mount here. However, this is really an investment that you're making. So I would definitely check out our hitch lock options here at etrailer.com. We do have an option where you can get a locking pin for the shank and a locking pin for the ball platform and that will protect this investment. You won't have to worry about somebody coming by behind your vehicle when it's unattended and trying to yank this off without you being there. The hitch pin hole diameter is 5/8 of an inch. Instructions are included. And this does have a limited lifetime warranty from Curt. I think that's gonna wrap up our brief look today. I do hope that our time together was helpful for you. Again, my name is Andy. Thank you for joining me.

Customer Satisfaction Score:

Ratings & Reviews

5.0

10 reviews
Review sort icon
This aluminum, adjustable ball mount lets you tow up to 8,000 lbs with the 2" ball or 12,500 lbs with the 2-5/16" ball. Can be used in a 3-1/2" drop position. Fits 2" x 2" hitch receivers.

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Great quality and workmanship.



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Outstanding product! Excellent quality!



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Beautiful, well made, lightweight, corrosion resistant, what's not to love!
I have spent my whole life swapping out trailer balls and different hitches to meet my particular needs now I just make an adjustment to fit the trailer. I'm a happy boy.



by:

Very nicely CNC machined drop hitch with the perfect amount of drop that I needed (7")
Note it says on the box that it cannot be used to raise the hitch, only to drop.



by:

Awesome hitch. Glad I made the purchase!

Brooke M. profile picture
Etrailer Expert

Brooke M.

3/3/2025

Sweet! Wed love to see a picture of it installed on your car if you felt like sending one in :)

Baynes74 profile picture

Baynes74

3/4/2026

Great hitch. Towed about 5K in miles this year and it was as expected.


10
10

See what our Experts say about this CURT Trailer Hitch Ball Mount

  • Can I Use A Locking Pin With The Alumalite Aluminum Adjustable 2-Ball Mount C28ZJ?
    Hey good question, Ron. I checked with Curt and they unfortunately do not make a locking pin that will work with the Alumalite Aluminum Adjustable 2-Ball Mount # C28ZJ. They do not recommend using a locking pin since use of any pin other than those provided with the ball mount is a safety hazard and will void your warranty. We do carry some 5/8" hitch pins that may fit but they are stainless steel. Using this on an aluminum ball mount could cause some corrosion so with that combined with...
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Aidan B
Installed by:
Aidan B
Employee Andy C
Installed by:
Andy C
Employee Ryan F
Written by:
Ryan F
Employee Matthew G
Video by:
Matthew G

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