TOW PERFORMANCE CALCULATOR

As a tow professional, you know there’s nothing worse, or more dangerous, than tackling a job with less truck than you need. Take the guesswork out of the vehicle build process with our Tow Performance Calculator and the new SURE™ Method from Jerr-Dan.

Download the SURE™ Method brochure.

Simply answer the questions that follow to determine if your vehicle is optimized for the unique demands of your towing operation.

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Choose An Axle Configuration

Your front axle weight should reflect the weight of the front axle when it is at its most common operating weight taking into account factors including driver, fuel level, and rigging.

Lbs

Wheelbase is the distance between the front and rear axle groups. On a tandem axle configuration wheelbase is measured from the center of the front axle to the center point between the rear axles.

Inches

The rear axle weight is the static unladen weight under normal operating conditions.

Lbs

The allowable rear tandem load is based on the axle and suspension ratings known as Gross Axle Weight Ratings (GAWR).

Lbs

The retracted length of overhang is the measurement from the center of the rear axles to the center of the lifting apparatus when the under-lift is extended just enough to allow crossbar rotation.

Inches

The extended length of overhang is the measurement from the center of the rear axle to the center of the lifting apparatus. The extended length is when the underlift is extended either fully or to a length that meets the max setback measurement of the casualty.

Inches

The front axle weight is its static weight in its most common condition, ie, Fuel level, driver, rigging, etc..

Lbs

The lift axle is the axle in front or rear of the drive axles. Raising the lift axle will change the Wheelbase and the FAW.

Yes No

Wheelbase measurements on a tri-axle unit will vary based on whether or not the lift axle is elevated. When the lift axle is in the raised position, wheelbase is measured from the center of the front axle to the center point between the Tandems. When the Lift Axle is lowered, wheelbase is measured from the center of the front axle to the center of the middle axle of the tri-axle set up.

Inches

Rear Axle Curb Weight when the Pusher is down at pre-determined pressure setting.

Lbs

Axle Spread is the distance between each axle measure from center line to center line. Some of the most common axle spread measurements are 52, 54, or 60 inches.

Inches

The allowable rear tandem load is based on the axle and suspension ratings known as Gross Axle Weight Ratings (GAWR).

Lbs

The retracted length of overhang is the measurement from the center of the rear axle configuration to the center of the lifting apparatus when the under-lift is extended just enough to allow crossbar rotation.

Inches

The extended length of overhang is the measurement from the center of the rear axle configuration to the center of the lifting apparatus when the underlift is extended either fully or to a length that meets the max setback measurement of the casualty.

Inches

Tow Performance with a 50% Steer Axle Target ?

The Tow Performance with a 50% steer axle target is the industry standard to maintain steering and braking ability.

Tow Performance based on Gross Axle Weight Rating ?

Tow Performance based on GAWR is influenced by the weight rating of the truck's rear axles and suspension. Ensure that your Gross Axle(s) Weight Rating (GAWR) is in line with the required Towing Performance.

Tow Performance ?

The Tow Performance retracted/extended is affected by front axle weight and wheelbase. Using this number will help you determine if the configuration of the tow truck will perform with the application casualty in-tow. This will also identify which model of wrecker you will need to select based on the equipment's reach and capacity.

Axle Load Retracted ?

The retracted axle load shows axle loading when the lift is in its retracted postion. Gross Axle Weight Ratings (GAWR) should be considered when looking at this number.

Axle Load Extended ?

The extended axle load shows potential axle loading when the lift is in its determined extended position. Gross Axle Weight Ratings (GAWR) should be considered when looking at this number.

Introducing the SURE™ Method from Jerr-Dan

Get the most value out of your vehicle by optimizing it for the specific environment, tasks and applications unique to your operation.

Download the Jerr-Dan SURE™ Method Brochure.

Click on your entry to make an update to the selected field.

What is your Front Axle Weight? (FAW) ?Lbs
What is your Wheelbase? ?Inches
What is your Rear Axle Weight? ?Lbs
What is Your Allowable Rear Tandem Load? ?Lbs
What is your Retracted Length of Overhang? ?Inches
What is your Extended Length of Overhang? ?Inches
What is your Front Axle Weight? (FAW) ?Lbs
What is your Wheelbase? ?Inches
What is your Rear Tandem Axle Curb Weight?What is your Rear Tri-Axle Curb Weight? ?Lbs
What is your Axle Spread? ?Inches
What is Your Allowable Rear Tandem Load?What is your Allowable Rear Tri-Axle Load? ?Lbs
What is your Retracted Length of Overhang? ?Inches
What is your Extended Length of Overhang? ?Inches

These calculations are estimations; Chassis and equipment specification will also affect towing performance.

Please help us improve our Tow Performance calculator.
Take this short, three question survey.

Your front axle weight should reflect the weight of the front axle when it is at its most common operating weight taking into account factors including driver, fuel level, and rigging.

Wheelbase is the distance between the front and rear axle groups. On a tandem axle configuration wheelbase is measured from the center of the front axle to the center point between the rear axles.

The rear axle weight is the static unladen weight under normal operating conditions.

The allowable rear tandem load is based on the axle and suspension ratings known as Gross Axle Weight Ratings (GAWR).

The retracted length of overhang is the measurement from the center of the rear axles to the center of the lifting apparatus when the under-lift is extended just enough to allow crossbar rotation.

The extended length of overhang is the measurement from the center of the rear axle to the center of the lifting apparatus. The extended length is when the underlift is extended either fully or to a length that meets the max setback measurement of the casualty.

The front axle weight is its static weight in its most common condition, ie, Fuel level, driver, rigging, etc..

Wheelbase measurements on a tri-axle unit will vary based on whether or not the lift axle is elevated. When the lift axle is in the raised position, wheelbase is measured from the center of the front axle to the center point between the Tandems. When the Lift Axle is lowered, wheelbase is measured from the center of the front axle to the center of the middle axle of the tri-axle set up.

Rear Axle Curb Weight when the Pusher is down at pre-determined pressure setting.

Axle Spread is the distance between each axle measure from center line to center line. Some of the most common axle spread measurements are 52, 54, or 60 inches.

The allowable rear tandem load is based on the axle and suspension ratings known as Gross Axle Weight Ratings (GAWR).

The retracted length of overhang is the measurement from the center of the rear axle configuration to the center of the lifting apparatus when the under-lift is extended just enough to allow crossbar rotation.

The extended length of overhang is the measurement from the center of the rear axle configuration to the center of the lifting apparatus when the underlift is extended either fully or to a length that meets the max setback measurement of the casualty.