Sherline Trailer Tongue Weight Scale


LM Trailer Tongue Weight Scales: This simple scale makes trailering safer.

Model No.
Dual-ring Gauge Ranges
LM-1000 0-1000 lb/0-460 kg
LM-2000 0-2000 lb/0-900 kg
LM-5000 0-5000 lb/0-2250 kg

Scales can be ordered factory direct through or call (800) 541-0735 during business hours to order.
CAUTION: Do NOT store your scale on its side, or in temperatures under 32° F (0°C).
Read the NOTE below for an explanation of inaccurate gauge readings.

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SKU: LM1000/LM2000/LM5000 Categories: ,

Product Description

About the Trailer Tongue Weight Scale

The scale uses a simple hydraulic principle to convert pressure into a reading in pounds on the gauge. No delicate electronics, no batteries, and only one moving part. It is available with gauges reading to 1000 lb, 2000 lb, or 5000 lb for 5th wheel trailers that typically carry a larger percentage of the overall weight on the gooseneck.

The scale is machined from solid billet steel and aluminum. It has a 3.25″ body diameter and is about 4.5″ high without the included screw-on hitch extension. (6.75″ with extension installed.) Actual weight is 4.4 lb. Gauge diameter is 2.75″. One year guarantee.

Stop guessing and start towing safely. Reasonably priced for individual trailer owners. Great for travel clubs and trailer dealers too.

Avoid Trailering Disaster!

If you tow a trailer behind your car, truck, or SUV and don’t know for sure if the tongue weight is within the recommended range, you could be headed for a disaster. Too much weight and you could damage the hitch or the trailer tongue, causing a catastrophic failure on the highway. Too little weight on the hitch and you could go into an uncontrollable fishtail at highway speeds. But how can you be sure if you are properly loaded?

To properly load and balance a trailer you must KNOW what your tongue weight is, and the Sherline trailer tongue weight scale offers an easy and inexpensive way to find out.

Gauges Now Read in Pounds and Kilograms

All gauges have a dual-scale gauge that reads in pounds on the outside of the ring and the kilogram equivalent on the inside. This feature has been requested by many trailer users outside the USA and has now been incorporated into all the scales.

  • The 0-1000 lb gauge reads to 460 kg
  • The 0-2000 lb gauge reads to 900 kg
  • The 0-5000 lb gauge reads to 2250 kg
Click on the image for a larger view.

NOTE on Inaccurate Gauge Reading

Is your trailer scale in a cold place (freezing or below)? If yes, this could be a factor. Cold or not, the piston has two O-rings on it. If the scale goes unused for a period of time (or if it is cold), the O-rings sometimes stick.

Hold the base down and try to turn the piston as if you were trying to screw it into the base. Then push down on it a few times (see Figure 1). If the gauge is reading 300-400 pounds with no load, then the piston is stuck. When you turn the piston, it should free it up and your gauge should go back to the “box area” at the zero end of the gauge.

CAUTION: Do not pull up on the piston. If you pull up too hard or too far, you will pull the piston out of the base.

If this fixes the problem, weigh your trailer again and see what the hitch weight is. Then remove the weight, see if the gauge goes back to the Zero box, and then check it again.

Trailer Towing Guides and Tales

Click on the Instructions tab to download our Towing Guide, Care and Tips sheet, and cautionary tales of true trailer disasters.

Other Purchasing Options:

LM2 Suspended Hydraulic Scale
LM5 5th-Wheel Trailer Hitch Weight Scale

The improper use of machine tools and their accessories can result in serious injury. Before using this tool, thoroughly read the instructions and make sure you understand its proper and safe use.


Always wear safety glasses when operating machine tools.

Download PDF Trailer Tongue Weight Scale Booklet

Instructions PDF Download

Download PDF Care and Tips Sheet

Instructions PDF Download

Download PDF Part Replacement Instructions

Instructions PDF Download

Download PDF Trailer Disasters

Instructions PDF Download

This Is How Trailer Weight Distribution Dynamics Work

This is why loading your trailer correctly is important. This visual is far better than it can ever be explained in words.

Height 4.5” (11.4 cm)
Height w/ extension 6.75” (17.1 cm)
Body diameter 3.25” (8.3 cm)
Max. width at gauge 7.0” (17.8 cm)
Actual weight 4.42 lb (2.0 kg)
Shipping weight 6 lb (2.72 kg)
Gauge diameter 2.75” (7 cm)
Gauge scale ranges 1. Outer Scale: 0-1000 lb = Numbers @ 200 lb, marks @ 20 lb increments (Inner Scale: 0-460 kg)
2. Outer Scale: 0-2000 lb = Numbers @ 400 lb, marks @ 50 lb increments (Inner Scale: 0-900 kg)
3. Outer Scale: 0-5000 lb = Numbers @ 1000 lb, marks @ 100 lb. increments (Inner Scale: 0-2250 kg)
Hydraulic Fluid installed at factory Texaco Regal R&O 68 industrial (turbine) oil
NOTE: Virtually any motor oil, hydraulic fluid or hydraulic jack oil can be used to replace lost fluid or to refill.

We offer two types of 3D object files: .igs and .stp.

  1. To view .igs files you need an IGS viewer. CLICK HERE to download a FREE IGS viewer.
  2. To view .stp files you need an STP viewer. CLICK HERE to use Autodesk’s FREE A360* online file viewer. STP is a file extension for a 3-D graphic file used by CAD software. STP stands for STandard for the Exchange of Product model data. STP files are used to store 3D image data in an ASCII format, following the standards defined in ISO 10303-21: Clear Text Encoding of the Exchange Structure.
  3. Each 3D file format has been compressed into a .zip file to save file space. Click on the .zip file link below to download it to your computer.
  4. Extract the .zip file to the drive location of your choice.
  5. Open the .igs file using the IGS Viewer, or open the .stp file using the A360 Autodesk online viewer.

*NOTE: There are also other free STP viewers that can be downloaded directly to your computer.

CLICK HERE to download the 3D IGS file
CLICK HERE to download the 3D STP file