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  1. Trailer Hitch Ball Mount
  2. Weigh Safe
  3. Adjustable Ball Mount
  4. Fits 3 Inch Hitch
  5. Drop - 10 Inch
  6. Rise - 11 Inch
Weigh Safe Hitch w/ Built-In Scale for 3" Hitch, 10" Drop11" Rise, 21K, Aluminum
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Weigh Safe

Weigh Safe Hitch w/ Built-In Scale for 3" Hitch, 10" Drop11" Rise, 21K, Aluminum

Part Number: WS55ZR
In Stock
$439.00
Retail:$454.00
You Save: $15.00
Trailer Hitch Ball Mount
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etrailer Installation
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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 3" Hitch, 10" Drop11" Rise, 21K, Aluminum part number WS55ZR 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 - WS55ZR

Highlights

  • 21,000 lbs GTW for Big Loads: Handles heavy trailers, campers, and boats with solid strength.
  • Built-In Tongue Weight Scale: Shows load balance instantly so you can tow safely without guesswork.
  • 10" Drop or 11" Rise for Level Towing: Lets you match trailer height precisely across setups.
  • Swappable 2" & 2-5/16" Balls: Covers multiple trailer coupler sizes with one adjustable mount.
  • Stowable Design for Clean Look: Flip under the truck to keep the hitch out of the way when not towing.
  • Locking Dual Pins & Receiver Lock: Keeps the mount and platform secure when hitched or stored.

Features to know about

Keeps Your Trailer Balanced: Built-In Tongue Weight Scale

Guessing tongue weight can make towing unpredictable. This hitch takes the uncertainty out with a built-in gauge right in the ball mount platform. The moment your trailer couples up, it automatically shows your tongue weight, letting you see if the load’s balanced before hitting the road. No more separate scales or extra steps—just a quick, accurate reading every time.

Adjusts for Any Trailer Height: 10" Drop and 11" Rise

Different trailers sit at different heights, and keeping things level makes a big difference in stability. The adjustable platform slides along the shank in 1" increments to give you up to a 10" drop or 11" rise. That means you can hook up everything from a small utility trailer to a tall camper and keep your setup level and steady.

Handles Heavy Loads with Confidence: Up to 21,000 lbs GTW

Heavy-duty gear deserves equally strong towing hardware. This hitch is rated for 21,000 lbs gross towing weight with the 2-5/16" ball and 10,000 lbs with the 2" ball, along with a maximum tongue weight of 2,200 lbs. The solid block 6061 T6 billet aluminum shank and stainless steel hitch balls deliver serious strength without unnecessary weight.

Stows Out of the Way: Flip-Under Design

Leaving a hitch on full-time can mean scraped shins or blocked access at the tailgate. This one flips around under the truck when not in use. Just remove the locking dual pins, place the platform on the back side of the shank, and secure it again. You can keep it mounted but tucked away, ready for next time.

Built to Last: Corrosion-Resistant Aluminum and Stainless Steel

Rain, salt, and road grime are tough on towing gear. The aluminum shank and platform resist corrosion while staying lightweight, and the stainless steel balls stand up to years of towing without rusting or pitting. With keyed-alike locking pins included to secure both the shank and platform, it stays protected and ready for any haul.

Specs

Application

  • Application: 3" x 3" trailer hitch receivers

Weight and Capacity

  • Gross towing weight (2-5/16" Ball): 21,000 lbs
  • Gross towing weight (2" Ball): 10,000 lbs
  • Maximum tongue weight: 2,200 lbs

Dimensions

  • Distance from center of hitch pin hole to center of hitch ball (closest to ball): 8-1/2"
  • Distance from center of hitch pin hole to center of hitch ball (farthest from ball): 9-5/8"
  • Maximum drop: 10"
  • Maximum rise: 11"
  • Incremental height adjustment: 1"

Warranty

  • Limited lifetime warranty

WS10-3-KA Weigh Safe 10" Drop Hitch w/ 3" Shank (10K/21K GTWR) w/ Locking Hitch Pin





Video of Weigh Safe Hitch w/ Built-In Scale for 3" Hitch, 10" Drop11" Rise, 21K, 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 3 Inch Receiver - WS55ZR

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 3 inch trailer hitch receiver. This ball mount is going to slide into your 3 inch receiver, and it's going to give you a 2-5/16 inch and a 2 inch ball, and these balls are stainless steel, as I mentioned. And in this orientation, this hitch is going to give you a maximum drop of 10 inches. And then when you flip this hitch over, you're gonna get a maximum rise of 11 inches, and you'll have an incremental height adjustment of 1 inch, so this is going to give you that height adjustability that you're looking for, so you can tow trailers of different heights with the same vehicle. So when you use the 2-5/16 inch hitch ball, you're gonna have a gross towing capacity of 21,000 pounds.

With the 2 inch ball, it's gonna be 8,000 pounds. And this has a maximum tongue weight of 2,200 pounds. And as you can see here, this does feature a tongue weight scale built right into the ball mount platform that's going to help you balance your trailer for safer towing. This scale is going to let you know if your load needs to be adjusted before you tow. It's gonna be a very simple operation.

This will automatically give you a measurement every time you couple your trailer, so it's efficient, it's fast, it's hassle-free, and it's gonna eliminate the need for separate or commercial scales. This also features this dual pin slider lock that's gonna make adjusting the height very simple. It includes this black rubber cover here that's gonna protect that keyway when it's not in use. As you can see here, you are going to receive four keys, and these keys are keyed alike. So the idea is you can use one key for the dual slider, the dual pin slider lock, or for the hitch pin lock, which we'll talk about in a minute.

But let me go ahead and insert the key here, give it a turn. And then that's going to allow me to easily remove this dual pin slider lock. The pins are constructed of aluminum, along with the housing. The lock, however, is plated steel, so this is gonna be very rugged and it's, again, gonna do a great job holding up against corrosion. So once I have those pins removed, you can see just how easy this is going to be to adjust to get that height that you're looking for.

Now when you are ready to swap out the ball, let me just show you how easy that's going to be. So you take them out off of the shank as you saw. And then what you're gonna do is you're either going to tip this like this, or if that pin doesn't come out, you can see that key ring there, you're just gonna pull this like that, so that pin is gonna come right out. And then I'm gonna take my 2-5/16 inch hitch ball out and swap it with the 2 inch ball. You wanna make sure that you line up the holes just like that. And then let me go ahead and replace the pin. And then you just wanna make sure that that ring is flush. And then I'll bring my shank back in and that's gonna slide right back on just like that. So, very easy to swap out the balls. And then I'm just gonna replace the dual pins here and make sure I got that locked in there. Yeah, it looks like I did, I lined it up right there. And then I'm gonna replace the cover. So I'm very impressed with just how easy it is to swap out the balls to get my height adjustment. You're not gonna spend any time behind your truck struggling to get what you need, the adjustability or the ball size, so everything's gonna operate very smoothly. So let's talk about this hitch pin lock here. This is, again, gonna be very simple to use, and this, it looks like my cap might have popped open here, that's gonna protect the keyway there, but let me go ahead and unlock this. I'll just give it a turn. And then what I wanted to mention about this lock, which I really like is you do not need the key inserted into the lock to lock this back into place. So I went ahead and locked this, removed the key as you saw. And then once you have this slid into your 3 inch hitch receiver, just slide the pin through, and then close it just like that, and then you're locked into place. So this hitch is constructed of aircraft-grade aluminum. It's gonna give you that superior strength and durability. That solid block construction is going to give you greater strength than a lot of hollow steel options. And this is going to maintain that light weight, and that clean finish is going to stand the test of time. And just some measurements to give you in case you we inchesre wondering, measuring from the center of our hitch ball to the center of our first hitch pin hole, we're sitting at about 8-1/2 inches. And then moving over to the second hitch pin hole on center, about 9-5/8 inches. And then from the center of the second hitch pin hole to the end of the shank, about 1-7/8 inches. And this is going to be V5 and J684 certified. And I think that's gonna wrap up our quick look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.

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:
by:
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.
by:
I downloaded the APP. It took me awhile to figure out how the App work. I think I have it figured out now. It would be nice to give a QR code to a video on how the APP set up works. The Hitch overall is made very well.
by:
It's a beast! Heavy duty and everything fits together perfectly. Can't wait to haul my camper with it and see what my actual tongue weight is.
by:
Received my new hitch today and can’t be happier with the build quality. Excellent customer service! Can’t wait to test it out on our next trip.
Lazer S. profile picture
Etrailer Expert

Lazer S.

1/27/2026

Glad you like it, JT! What is the next trip you have planned?

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.
by:
I've used this for 12 months on a wide range of trailers 3000-15,000# and it's a great product. At the Cat Scale last week I checked the tongue weight at 1300# on the gauge and it was correct. The range of heights is great with trailers from car carrying box trailer to very tall ag trailer, it works with my 1 ton for all. The light weight makes it easy to mount and dismount 1 handed.
by:
I am really impressed with the quality of the Weigh Safe. Although I haven’t used it yet I think it will perform better than my last hitch that almost failed. I will update after I use it.
Mike L. profile picture
Etrailer Expert

Mike L.

8/17/2026

Please do, we'd love to hear what you think!

by:
No complaints ! Everything from before purchase, to using the hitch has been how all of American business should operate. Thank YOU
by:
I haven't towed with it yet, but out of the box very impressed. It weighs in at approx 18 lbs, so rugged. Using on a 2022 RAM 2500. I was concerned because some drop hitches don't fit well in RAMs due to the rounded corners in the receiver. This one fit perfectly. Shipping was great. Packaging was great. I expect it will tow just fine.
by:
Great product and easy to use. Takes the guess work out of calculating the tongue weight.
by:
The hitch is very high quality, no questions it’ll take the full 12,500lbs is rated for. etrailer customer service and shipping is another story, arrived rattling around in a cardboard box with no package material. The lock kit box was absolutely destroyed but fortunately the lock was undamaged. UPS delivery because the shipping label came off. I tried contacting etrailer by email twice because UPS kept telling me my package was damaged, never heard a thing back. Luckily my driver figured out it belonged to me and was able to get the box relabeled.
by:
I'm very pleased with the weigh-safe hitch. it exceeds all my expectations. extremely well built and it is extremely heavy duty which is what I was looking for. I will be using it for years.
by:
Best trailer hitch ever purchased. Worth every penny.
by:
Looks great, works even better, delivery was quicker than I would have believed. Great job Etrailer!
by:
Quick install, nice! It’s built like a tank, I was concerned about weight, not anymore, it’s so light, even the UPS guy was carrying the hitch with one arm tucked by his side! 3” shank, yes, not much slop. Looking forward to using it for the 1st time tomorrow. Looks sweet on the truck too!
by:
Quality product. Much lighter and easier to handle than comparable steel hitch. Scale seems to be accurate based on camper loading and advertised dry tongue weight.
by:
Haven't open the box yet. Shipping was fast.
by:
Great hitch, the 8" drop worked great on my 24 Ford F250 Tremor.
by:
I haven't used the product yet but the experience has been great dealing with etrailer and it looks/feels like a quality built product.
by:
Great product for being able too adjust the right height for those that have multiple trailers.
by:
Always fast delivery and items shows up perfectl.
by:
Don't know why I didn't buy this sooner. I will never tow without it. The scale is accurate and reliable.
by:
Great product and a good value!
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Used Items Available
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Condition: Surface Scratches

Notes: Item has minor cosmetic scratches.

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