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  1. Trailer Hitch Ball Mount
  2. Weigh Safe
  3. Adjustable Ball Mount
  4. Fits 2 Inch Hitch
  5. Drop - 4 Inch
  6. Rise - 5 Inch
Weigh Safe Hitch w/ Built-In Scale for 2" Hitch - 4" Drop/5" Rise - 12.5K - Aluminum
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Weigh Safe

Weigh Safe Hitch w/ Built-In Scale for 2" Hitch - 4" Drop/5" Rise - 12.5K - Aluminum

Part Number: WS66ZR
In Stock
$349.00
Trailer Hitch Ball Mount
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Here's your versatile solution for safe towing! This aluminum hitch has a built-in gauge for measuring tongue weight, comes with two stainless steel tow balls that swap out easily, and includes locking pins to keep everything securely attached. Great Prices for the best trailer hitch ball mount from Weigh Safe. Weigh Safe Hitch w/ Built-In Scale for 2" Hitch - 4" Drop/5" Rise - 12.5K - Aluminum part number WS66ZR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Weigh Safe Trailer Hitch Ball Mount - WS66ZR

Highlights

  • 12,500 lbs GTW for Heavy Loads: Handles large campers, boats, or equipment trailers safely.
  • Built-In Tongue Weight Scale: Shows your trailer’s load balance automatically when coupled.
  • 4" Drop or 5" Rise for Level Towing: Adjusts to keep multiple trailers even with your truck.
  • 2" and 2-5/16" Balls Included: Covers common coupler sizes for quick trailer swaps.
  • Corrosion-Resistant Aluminum Build: Lightweight yet strong with stainless steel balls.
  • Locking Pins Included: Keep the height platform and hitch ball securely fastened in place.

Features to know about

Makes Balancing Simple: Built-In Tongue Weight Scale

Guesswork used to be part of every hitch-up, but not with this setup. The Weigh Safe hitch has a built-in gauge that shows your trailer’s tongue weight automatically when you couple up. No separate scales or extra steps—just hook up and know your load is balanced before you hit the road. It’s rated for up to 1,500 lbs maximum tongue weight, so you can dial in safe, steady towing every time.

Adapts to Different Trailers: Adjustable 4" Drop and 5" Rise

Switching between trailers doesn’t mean swapping hitches. The adjustable platform slides up or down the shank in 1" increments, giving you a 4" drop or 5" rise. Whether your trailer sits higher or lower, you can match its height easily and keep it level behind your tow vehicle. Once it’s set, lock it in place with the included pin and get a consistent, even ride every trip.

Handles Heavy Loads with Ease: 12,500 lbs GTW Rating

This hitch is built for serious towing. The 2-5/16" ball carries up to 12,500 lbs gross towing weight, while the 2" ball handles up to 10,000 lbs. It’s strong enough for large campers, boats, or equipment haulers, and the aluminum shank keeps things solid without adding unnecessary weight. With certified stainless steel balls that meet SAE J684 standards, it’s ready for reliable heavy-duty use.

Stays Clean and Solid: Rust-Resistant Aluminum and Stainless Steel

Road grime and moisture can wear down ordinary hitches fast. This one uses an aluminum shank with a silver finish and stainless steel balls that resist corrosion season after season. You can leave it installed full-time without worrying about rusted parts or sticky adjustments—the materials hold up in all weather while keeping a clean look on the back of your truck.

Hooks Up Securely: Two Hitch Balls and Locking Pins Included

Every connection point matters when you’re towing heavy gear. This setup includes both a 2" and a 2-5/16" stainless steel ball so you can hook up different trailers without hunting for tools or spare mounts. Locking pins keep everything secure once it’s adjusted, so you can focus on your drive instead of checking your hardware halfway down the highway.

Specs

Application

  • Application: 2" x 2" trailer hitch receivers

Weight and Capacity

  • Gross towing weight (2-5/16" ball): 12,500 lbs
  • Gross towing weight (2" ball): 10,000 lbs
  • Maximum tongue weight: 1,500 lbs

Dimensions

  • Distance from center of hitch pin hole to center of hitch ball:
    • Hitch pin hole closest to ball: 8-1/2"
    • Hitch pin hole farthest from ball: 9-5/8"
  • Maximum drop: 4"
  • Maximum rise: 5"
  • Incremental height adjustment: 1"

Warranty

  • Limited lifetime warranty

WS4-2-KA Weigh Safe 4" Drop Hitch w/ 2" Shank (10K/12.5K GTWR) w/ Locking Hitch Pin





Video of Weigh Safe Hitch w/ Built-In Scale for 2" Hitch - 4" Drop/5" Rise - 12.5K - Aluminum
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of Weigh Safe Built In Scale Hitch 2 Stainless Steel Balls 2 Inch Receiver - WS66ZR

Hi, everybody. Andy here with etrailer.com. Let's take a look at this Weigh Safe Built In Scale Hitch with two Stainless Steel Balls for your two inch Trailer Hitch Receiver. Now this ball mount is going to slide into your two inch trailer hitch receiver, and it's going to give you two balls. As I mentioned, you're gonna get a two inch stainless steel ball, and a two and five 16th inch stainless steel ball. And this is going to give you a maximum drop of four inches in this orientation.

And then when you flip this over, you're gonna get a maximum rise of five inches. And the adjustment is going to be incremental of one inch. So one inch incremental adjustment. And so this is going to give you the height adjustability so you can tow trailers with different heights with the same vehicle. And the gross towing capacity with the two and five 16ths inch hitch ball is 12,500 pounds, as you can see there.

And then with the two inch ball, it's 8,000 pounds. And this has a maximum tongue weight of 1,500 pounds. Now this does feature a tongue weight scale that is built into the ball mount platform. This is going to help you balance your trailer for safer towing, and the scale's going to let you know if your load needs to be adjusted before you tow. And this is gonna be a really simple operation.

This will automatically give you measurements every time you couple your trailer so it's efficient, it's hassle-free. And this is going to eliminate the need for separate or commercial scales. This also features a dual pin slider lock that's going to make adjusting the height very simple. So I'm gonna go ahead and remove this rubber cover here that's going to protect the lock core from dust and debris. And I'm gonna use one of the four keys here.

By the way, this is all built keyed alike. So all four of these keys are gonna work with either the the dual pin slider lock or the hitch lock that we'll talk about in just the next minute or so. But I'm just gonna go ahead and insert this key, give it a turn. And then that's going to allow me to remove my dual pin slider lock. By the way, these pins and the housing are aluminum. and then the lock is plated steel, So this is in itself very durable and it's going to do a great job of resisting corrosion. So now I'm able to freely adjust the height here, or I could flip this over to provide a rise as well. So very easy. What I'm gonna do here is I also wanna show you how easy it is to swap the ball out. So I currently have my two and five 16ths inch ball in there. So I'm just going to tip this over here a little bit and pull this ring. Sometimes the pin will slide right out, other times it won't. So that's why it has that ring there, so you can pull it out. So with the pin out, that's going to let me remove the two and five 16ths inch ball. And I'm gonna drop in my two inch ball, line up the holes there, and then make sure that that's flush. And then I'm gonna go ahead and get my shank bath here and just drop that back in like so. So this is going to be just that simple to swap out the balls and make adjustments as needed. And what I really appreciate about all of this is everything operates very smoothly. You're not gonna be at the back of your vehicle, struggling to make those adjustments or to swap out the balls. It is just gonna be a very quick adjustment overall. Now as I mentioned, this does also include this hitch pin, this locking hitch pin here. It has a cap here to protect that keyway as well. So I'm just gonna grab these keys and it's gonna be very easy to remove. And something that I appreciate about this locking pin is I went ahead and locked that head up and I removed the key, and I do not need the key to lock this back into place, which is nice. So that's one less thing you'll have to worry about. As long as you have this locked and the keys removed, you can just snap it back in just like that and you're secured to go. So again, all four keys here that you're going to receive. It's all gonna be keyed alike, so the idea is you can use one key for everything here. And then I went ahead and took some measurements before our time together, just to give you an idea of the size. So measuring from the center of the first hitch pin hole to the center of our ball, we're sitting at about eight and a half inches. Moving to that second hitch pin hole on center, nine and five eight inches. And then from the center of our second hitch pin hole to the end of our shank, about one in seven eights inches. This is V5 and J684 certified. But I think that's gonna wrap up our look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.

Customer Satisfaction Score:

Ratings & Reviews

4.9

130 reviews
5 Stars
(123)
4 Stars
(1)
3 Stars
(3)
2 Stars
(2)
1 Star
(1)
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by:
I use this to haul a car on a trailer with my Rv and tongue weight is very important because I don't want to flex the frame, my rv has a very long distance from the axel to the bumper. And with this hitch I am able to place the car on the trailer and know the tongue weight for each position I put the car in. I was able to level the trailer as well. This hitch is well made.
by:
The weight scale is not registering the tongue weight. It stays on zero.
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Haven't open the box yet. Shipping was fast.
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Very robust construction. Easy to use. A great value for those towing varying loads, helping to prevent loading errors that could create serious safety risks.
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Awesome
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Solid
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I was very pleased with the fit and finish of the Weigh Safe hitch and scale. I also purchased a standalone tongue weight scale and was happy to see both of them give me very identical readings. I would like to see an additional pin on the height adjustment pin so it’s not relying solely upon the key lock. I would certainly recommend this hitch for someone that wants to know their trailer tongue weight. Will definitely cut down my trips to the CAT scale and provide a more accurate measurement. I can also move weight around and see direct results on the tongue.
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See what our Experts say about this Weigh Safe Trailer Hitch Ball Mount

  • Weigh Safe Hitch WS66ZR - What Is The Distance From Hitch Pin Hole To Back Of Rise Portion?
    Hey Bruce, thanks for reaching out. I went out to our warehouse and measured one of the Weigh Safe Hitch w/ Built-In Scale # WS66ZR. It has two hitch pin holes, so depending which one you use, the distance from the center of the hole to the back of the rise portion is either 3" or 4-1/4". I edited a picture to help illustrate. How much length do you need for the rise portion to clear the bumper?
    view full answer...
  • Do You Carry a 1 7/8" Ball for My Weigh Safe Hitch w/ Built-In Scale for 2" Hitch # WS66ZR?
    Hello Joshua, We have exactly what you are looking for, the Replacement 1-7/8" Hitch Ball for Weigh Safe Ball Mounts - Stainless Steel - 7,500 lbs # WS66KR. Now you will be able to hook up to any trailer. What kind of trailer are you towing that you need the 1 7/8" ball?
    view full answer...
  • Is there a Weigh Safe 180 Hitch 2 Ball Mount w/a Tongue Weight Scale?
    Hey John. The tongue weight scale is only available on the Weigh Safe Hitch w/ Built-In Scale for 2" Hitch item # WS88VR or item # WS66ZR. These ball mounts do include both a 2" and a 2-5/16" hitch ball that swaps out quickly with the turn of a key. The Weigh Safe 180 Hitch 2-Ball Mount item # WS82VR and item # WS34UR do not have an option for a tongue weight scale. What kind of trailer do you have? You can add this information and any other questions you have where it says Reply...
    view full answer...
  • Will The Weigh Safe Hitch Pin Fit My Toyota’s Thicker Receiver?
    Hello Ceez, Welcome to etrailer! I'm glad you found us. I wasn't quite sure on this one, so I went out to our warehouse and pulled the Weigh Safe Hitch w/ Built-In Scale # WS66ZR to measure the pin for you. As you can see in the pictures I attached, the usable length is just shy of 3-11/16". From what I am showing on my end, this should work with your receiver, but it definitely doesn't hurt to head out and double-check the measurement on your Toyota. As long as your receiver measures...
    view full answer...

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Used Items Available
Image of WS66ZR

Condition: Surface Scratches

Notes: Item has minor cosmetic scratches. Otherwise new and unused.

$321.27
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video Edited:
Joshua S
Employee Chris R
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Chris R
Employee John S
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John S
Employee Dustin K
Installed by:
Dustin K
Employee Andy C
Installed by:
Andy C
Employee Matthew B
Installed by:
Matthew B
Employee Wilson B
Updated by:
Wilson B
Employee Katherine B
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Employee Kim H
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