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

Weigh Safe 2-Ball Mount w/ Built-In Scale - 2" Hitch - 4" Drop, 5" Rise - 12.5K

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Our Price: $279.00
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Trailer Hitch Ball Mount
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Shipping Weight: 17 lbs
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Measure your tongue weight to determine if you can safely tow by simply coupling your trailer to this ball mount. Ball platform locks to shank. Tow up to 8,000 lbs with the 2" ball and up to 12,500 lbs with the 2-5/16" ball. Lowest Prices for the best trailer hitch ball mount from Weigh Safe. Weigh Safe 2-Ball Mount w/ Built-In Scale - 2" Hitch - 4" Drop, 5" Rise - 12.5K part number WS4-2 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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  • Reviews (1083)
  • Q & A (36)
  • Photos
  • Why etrailer?

Weigh Safe Trailer Hitch Ball Mount

  • Fits 2 Inch Hitch
  • Adjustable Ball Mount
  • Drop - 4 Inch
  • Rise - 5 Inch
  • 2 Inch Ball
  • 2-5/16 Inch Ball
  • Two Balls
  • Class IV
  • 10000 lbs GTW
  • Built-In TW Scale
  • Weigh Safe
  • Aluminum Shank - Silver
  • Stainless Steel Ball

Measure your tongue weight to determine if you can safely tow by simply coupling your trailer to this ball mount. Ball platform locks to shank. Tow up to 8,000 lbs with the 2" ball and up to 12,500 lbs with the 2-5/16" ball.


  • Ball mount with included hitch balls lets you hook up your trailer to your tow vehicle
    • Shank slides into hitch receiver
    • Ball provides connection point for trailer coupler
  • Tongue weight scale built into the ball mount platform helps you balance your trailer
    • Promotes safe towing - lets you know if your load needs to be adjusted before you tow
    • Simple operation - automatically provides a measurement every time you couple your trailer
    • Efficient and hassle-free - eliminates the need for separate or commercial scales
  • Adjustable height lets you tow trailers of different heights with the same vehicle
    • Slide ball mount platform up or down shank and secure in place with included dual locking pins
      • 2 Keys are included
  • 2 Different-size hitch balls let you tow trailers with different coupler sizes
    • To switch ball, simply remove the ball-retaining lock pin from the platform, insert ball, and reinsert pin
  • 6061 T6 billet aluminum shank and mounting platform provide superior strength and durability
    • Solid block construction provides greater strength than hollow steel competitors while also maintaining a light weight
    • Rustproof for a clean finish that stands the test of time
  • Stainless steel hitch balls are corrosion resistant
  • Hitch pin and clip or hitch lock sold separately
  • SAE J684 certified and VESC Regulations V-5 compliant
  • Made in the USA


  • Application: 2" x 2" trailer hitch receivers
  • Gross towing weight:
    • 2-5/16" Diameter hitch ball: 12,500 lbs
    • 2" Diameter hitch ball: 8,000 lbs
  • Tongue weight: 1,500 lbs
  • Distance from center of hitch pin hole to center of hitch ball:
    • Pin hole closest to ball: 8-1/2"
    • Pin hole farthest from ball: 9-3/4"
  • Maximum drop: 4"
  • Maximum rise: 5"
  • Incremental height adjustment: 1"
  • Scale gauge diameter: 1-1/2"
  • Warranty:
    • Limited lifetime for ball mount
    • 1-Year limited for scale gauge

Weigh Safe ball mount coupled to a trailer

This Weigh Safe ball mount has an easy-to-use, built-in scale that measures your trailer's tongue weight every time you tow. If the scale indicates that your tongue weight is too low or too high, you can adjust it before you head out so that you can complete your journey with the peace of mind that your setup is safe.

What is Tongue Weight?

Tongue weight (TW) refers to the weight that the fully loaded trailer exerts downward on the hitch ball of the tow vehicle. Tongue weight is typically 10 percent - and should not exceed 15 percent - of your gross trailer weight. For example, a 10,000-lb trailer should have a tongue weight between 1,000 lbs and 1,500 lbs. You can adjust the tongue weight of your trailer by removing or adding cargo, or redistributing the load on the trailer. The tongue weight should not exceed the capacity of your tow vehicle, your hitch, or any of your towing components.

Why is Tongue Weight So Important?

Weigh Safe helps ensure proper trailer tongue weight

Simply put, too little tongue weight can cause trailer sway and too much tongue weight can cause the tow vehicle to perform poorly. You may have difficulty steering, gaining traction, or braking when driving a setup that has too much weight pushing down on the rear of the vehicle. Ultimately, towing with an improper tongue weight can cause you to lose control of your vehicle or cause your trailer to separate from the vehicle.

Built-In Tongue Weight Scale

The gauge of the Weigh Safe built-in tongue weight scale

The Weigh Safe ball mount's built-in scale signals you to adjust your load before you hit the road, resulting in a much safer and enjoyable towing experience. Before this ball mount, gauging your trailer's tongue weight was a hassle. You had to rely on inefficient bathroom scales, make a trip to the weigh station, or purchase a separate tongue weight scale. But with the Weigh Safe's built-in scale, measuring your tongue weight is as easy as coupling your trailer to your ball mount. Simply hook-up your trailer to the Weigh Safe ball mount just as you would any other ball mount. The weight of your trailer will push down on the hitch ball, which in turn pushes down on an internal hydraulic piston that sits on a bed of oil. When the piston drops into the oil, the pressure reading is sent out to the scale.

Easily Adjusts to Fit Your Setup

Weigh Safe ball mount has adjustable height

Adjusting and setting up the Weigh Safe ball mount to work with your specific trailer is easy. First, unlock and pull out the dual pins and remove the platform from the shank. Next, pull out the hitch ball retaining pin from the back of the platform and insert either the 2" or 2-5/16" hitch ball. A 1-7/8" hitch ball (WSB-L - sold separately) is also available. Then reinsert the retaining pin to secure the ball to the platform. Replace the platform and slide it along the shank to the desired height. Insert the dual pins and use one of the included keys to lock the pins in place.

Weigh Safe ball mounts installed in drop and rise positions

The Weigh Safe ball mount can be used in either the drop or rise position to best suit your application.

Superior Aluminum and Stainless Steel Construction

From the first moment that you lay eyes on the Weigh Safe ball mount you'll see that you're getting a superior, well-made product. The Weigh Safe's shank and ball mount platform are made entirely of 6061 T6 billet aluminum, which is the same material that is used to build aircraft components, automobile frames, and freight liners. This type of aluminum is known for having superior strength while maintaining its light weight, which makes it highly desirable over hollow steel components. 6061 T6 aluminum is also rustproof, which means the Weigh Safe hitch will maintain its clean, shiny, and impressive appearance for years to come. And the hitch balls are made of solid stainless steel, offering far greater protection against rust and corrosion than other steel hitch balls that are only painted or plated on the surface.

The Weigh Safe ball mount meets VESC V-5 regulations and is SAE J684 certified. These regulatory bodies - the Vehicle Equipment Safety Commission and the Society for Automotive Engineers - create standards for the design, construction, and performance of automotive and towing accessories. Weigh Safe has had this ball mount thoroughly tested in simulation to ensure that it complies with these standards. The result is a strong, safe, sturdy product that is built to last.

How to Measure Drop on Adjustable Ball Mount

WS4-2 Weigh-Safe Trailer Hitches with Tongue Weight Gauge - 2" x 2-5/16" Ball Combo - 4 Inch Drop - 2 Inch Hitches

Item # WS4-2

Customer Reviews

Weigh Safe 2-Ball Mount w/ Built-In Scale - 2" Hitch - 4" Drop, 5" Rise - 12.5K - WS4-2

Average Customer Rating:  4.8 out of 5 stars   (1083 Customer Reviews)

Measure your tongue weight to determine if you can safely tow by simply coupling your trailer to this ball mount. Ball platform locks to shank. Tow up to 8,000 lbs with the 2" ball and up to 12,500 lbs with the 2-5/16" ball.

- WS4-2

Until you see this hitch in person, it's hard to appreciate the high quality look and feel. It looks like it was made for an airplane, forged aluminum, well engineered. I used mine just a few days ago to tow my new tilt trailer home. The scale only showed about 100# or so but the trailer was empty. It was easy to adjust for the correct height and that feature will be handy when we get a different horse trailer. I also bought the locking hitch pin. Wish I had know to get them keyed alike but not a big deal. Tim was a big help in selecting this hitch and locking pin.

Used the hitch to haul some square bales of hay during the summer. The scale showed about 500 hitch weight which was approx 10 of the entire load. That was ideal, towed great! Im glad I bought it. Very satisfied.
Richard - 04/06/2020

- WS4-2

Constantly changing trailers and loads this hitch has been fabulous. A quick glance at the meter and I know exactly what my tongue weight is and always pull with the knowledge that the trailer is properly loaded and my tongue weight is appropriate. You will want to add some sort of "anti-clunk" damper as it is a noisy hitch. I use rubber rings and a shim to keep the hitch from shifting in the receiver.

- WS4-2

Top of the line hitch system that allows you to pull multiple types of trailers, safely. Trying to estimate your weight balance is a fools mission. This hitch, with the scale tells you immediately how much weight you have on the bar. Best yet, the dual ball hitches eliminated changing hitches. Adjustable positions are a must. Too many people use the same hitch for trailers with out doing the proper drop measurements nor do they check on the tongue weight. DO it right and be safe. I see the resale value of this one to be quite high due to lack of competition and quality of craftsmanship. This is NO PIECE OF CHINESIUM. This is a solid made in the USA product. Absolutely impressed.

- WS4-2

When I switched tow vehicles from a Silverado to a Durango SRT I had to be a lot more conscious of tongue weight. The adjustability in this hitch and the tongue weight scale let me set up each trailer to tow flawlessly behind the Durango SRT.

- WS4-2

Love this hitch. Watching the video on the etrailer site is what sold me on the product and it’s exactly the way it was presented. We have 2 trucks of different heights and 3 trailers that use 2” and 2 5/16” balls. Changing out the different hitch balls takes about 30 seconds... No vise needed, no huge wrenches to torque the nut down. I also purchased the available locking receiver pin, keyed the same as the adjustable hitch pin lock.. I also am very happy to know exactly what my trailer tongue weight is. Easy to use, lightweight, multipurpose, and looks pretty cool, too.

- WS4-2

This is a great hitch if you want to know your trailer hitch weight. It is a bit bulky but works the way it should. Pretty strait forward as far as setting it up.

- WS4-2

Mostly the mount is used for personal use with a 20' trailer. This is the most amazing ball mount not only for the ability to adjust the height but also being able to keep the tongue weight down. Probably one of my biggest concerns on trailering a vehicle is how much load is on the ball mount/hitch.

It works great! Having the hitch adjustable for multiple trailers is awesome. Also, the scale work perfect for the times I haul the car trailer. No longer do I have to worry about excessive tongue weight or the trailer whipping back and forth for too much weight on the back.
Jeff - 04/04/2021

- WS4-2

This ball mount is awesome. I had no idea what my tongue weights have been over the years pulling a few different size trailers. Now I know I need to adjust my bot trailer for more tongue weight.

- WS4-2

Quality construction, easy to use, and needed info on tongue weight

- WS4-2

This hitch is very well made and intelligently engineered. I like how easy it is to switch out the balls. We are very happy with out purchase.

- WS4-2

Nice part, don’t have to pack around the 100# hitch to the trailer hitch anymore, yeah! Hope it lasts a long time.

- WS4-2

This product does not disappoint. I just received it today. Fit and finish are superior even to my strict standards. One thing that is different about the unit compared to the published pictures is that the tang that inserts into the receiver is squared off as opposed to angular as shown in the pictures. I prefer this squared look/style much more. I am very anxious/excited to use this hitch. Only time will tell how the scale function will last. Based on the quality machining and fitment, I am betting it will last a long time. AMERICAN MADE!!!!

- WS4-2

This is my second purchase of the Weigh Safe hitch. I had to buy a smaller one because I traded trucks and the 3" shaft was too large for the new truck's receiver. The first one I had was used around 3 years and I was 100% satisfied with it so it was an easy decision for this purchase.

- WS4-2

This is a very good product I have no complaints. My daughter ‘s RV Tongue weight is close to 1000 pounds and we thought it was about 600 at the most. It is also well terminated and looks cool on my truck. Attached a pictute

- WS4-2

Best receiver and ball assembly on the market! The built-in scale told me immediately that my trailer's tongue weight was fine and not overloaded as I had previously thought. Masterfully built and exacting as if it were for the aircraft industry. Forget what it costs and buy it. You won't be disappointed.

- WS4-2

This is a nice looking hitch, wasn't really after the weigh feature just the design of the hitch. Other hitches always have another ball upside down at all times and I didn't want that, the balls and height are easy to change out. The only thing I don't like is it only comes with 2 balls and I had to order a third to cover all sizes, it should have come with all three!

- WS4-2

This is a great setup and takes all the guess work out of receiver weight. I load my car trailer so much faster now due to not having to guess how far up or back to keep receiver weight correct. The quality of this system is by far the best I’ve seen. Works great and it’s bullet proof as well. Buy it and you won’t be sorry!

I love this weigh safe system. Get one. Just, get one.
Mike H - 05/30/2020

- WS4-2

Use it on a 6 cylinder Tacoma with fairly low tongue rating to pull a 5x8 single axle dump trailer. Great design, easy to use. Takes the guess work out of balancing your load. You have to give the scale a few seconds before reading because it is hydraulic. Not cheap but certainly worth the money.

Probably use it once or twice a month with no issue.
Little D - 06/20/2020

- WS4-2

Considered buying this for quite some time, should have just done it! Now I know exactly what my trailers tongue weight is and it will be helpful in selecting our next vehicle. Our neighbor has also used it and found he was exceeding his trucks tongue weight, but by moving a few things around in the trailer, he's now way under! Excellent product and VERY nicely constructed!

- WS4-2

This product is truely a work of art. I like the ability to easily change the ball height. It’s also very convenient to be able to see the tongue weight as you load the trailer.

- WS4-2

Works great with my 22 ft bass boat and trailer. I can level the trailer for better towing. Also with the scale I can load my equipment trailers to keep the tongue waite to spec.

- WS4-2

An absolute must-have for safe towing, one of the best accessories I've purchased. Although, It would be great if it had an option for a lower resolution scale for lower towing capacity vehicles. (For example 0-1000 instead of 0-2200).

- WS4-2

Slick, and it doesn't leave you guessing what the tongue weight is on any item loaded onto the trailer. Very well built. BTW, George and the folks at Etrailer are superb. I placed an order at night on a weekend, and George was already looking at the order to see if one of the items ordered could be substituted with another product if I didn't want to wait on the original part. These folks ship about as fast as anybody on the web, and I have never received a bad unit/part or anything else.

- WS4-2

I researched the internet for a versatile (yet reasonably-priced) hitch for my Sierra HD. All searches led back to this Weigh Safe hitch on etrailer.com. The hitch is premium quality with excellent machined surfaces, and the built in scale really helps to balance the load for the safest possible tow. I love the fact that I can invert the ball and attach it on the back side of the hitch to eliminate those "shin-busters" when not in use. I also splurged on the locking hitch pin set to ensure that no one else can borrow my hitch, and I love that both locks are keyed the same to eliminate one extra key on my keychain. I highly recommend the set to anyone who wants a top quality hitch, and I fully recommend that they purchase from etrailer.com!

Update: It has been one year since purchasing, and I am still completely satisfied with this product. As expected, the aluminum construction has weathered well. I keep the hitch inverted facing the front of the truck when not in use, so there are times when I need to squirt a bit of WD40 into the lock to clean out the debris, but I have had no issues with any of the materials andor components. The dust cover on the locking pin definitely keeps the lock free of debris. I highly recommend both products and etrailer.com. You cannot go wrong with either.
Tyler - 08/24/2019

- WS4-2

Looks great, definitely adds a touch of class to what is ordinarily an unsightly part of the vehicle. I'm suspicious about the accuracy of the scale, as the entire range is large and any particular vehicle or trailer is only going to use a small faction of the whole scale, and the indicator doesn't move very much within that range.

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