Find Your Shank Size | Fastway Trailer Products

Shank Size Calculator

Enter Your Information

Hitch Ball Height (in.)

Receiver Height (in.)

Coupler Height (in.)

Receiver Size

2 1/2''

Extended Length

Yes

4k Model

Yes

We're sorry we could not find any shank that fits your requirements.

Fill in the fields to find the right shank size for you.

2 1/2" Shank
12" / 3" / 7"
90-02-4125
$228.01

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This is only an estimate and may not work with your particular setup. If you have a unique setup or need further clarification, please chat or call our customer service team at 800-478-5578 or consult your local dealer before making a purchase.

2 1/2" Shank
12" / 4" / 8"
90-02-4225
$228.01

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2 1/2" Shank
12" / 6" / 10"
90-02-4325
$247.63

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2 1/2" Shank
12" / 9" / 13"
90-02-4425
$262.22

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2 1/2" Shank
12" / 12" / 15"
90-02-4725
$281.48

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2" Shank
12" / 3" / 7"
90-02-4100
$166.11

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2" Shank
12" / 4" / 8"
90-02-4200
$166.11

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2" Shank
12" / 6" / 10"
90-02-4300
$192.48

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2" Shank
12" / 9" / 13"
90-02-4400
$213.96

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2" Shank
18" / 3" / 7"
90-02-4500
$213.96

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2" Shank
18" / 4" / 8"
90-02-4600
$213.96

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2" Shank
12" / 12" / 15"
90-02-4711
$230.93

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2" Shank for 400/4000 lb. Hitch
12" / 3" / 7"
90-02-4140
$153.83

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2" Shank for 400/4000 lb. Hitch
12" / 4" / 8"
90-02-4240
$153.83

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2" Shank for 400/4000 lb. Hitch
12" / 6" / 10"
90-02-4340
$162.43

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Hitch Ball Height

Measure from the top of the ball to the flat part of the base where the ball will sit on the hitch head. Do not include the length of the threaded shank.

Receiver Height

Measure from the ground directly below the receiver to the inside top of the receiver tube (where the top of the shank will be).

Coupler Height

Level the trailer. Measure to the frame on the front & back of the trailer and use the tongue jack to raise or lower it until the measurements at both ends are the same, and the trailer is sitting parallel to the ground.

Measure from the ground to the top of the socket where the hitch ball fits into the coupler.

Receiver Size

Newer heavy duty trucks sometimes come equipped with a 2-1/2” or even a 3” receiver. Equal-i-zer hitches will not fit receivers smaller than 2”. They can be used with 3” receivers by using a 2-1/2” shank, and the correct adaptor sleeve if allowed by the vehicle manufacturer.

Extended Length

An extended shank length gives you more room behind the tow vehicle to give more clearance for things like a tail-gate mounted spare tire. Most configurations do not need an extended length, and using the shortest shank possible is the safest option.

4K Model

The 4K model uses a lighter-weight shank than the 6K-14K models. They are not interchangeable. Choose this option only if you have or are purchasing a 4K Equal-i-zer hitch. Use the hitch size calculator to determine the Equal-i-zer hitch model you need.