What Size Hitch Ball for Jet Ski Trailer

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Last Updated on July 31, 2022

If you’re going on vacation and want to go water skiing, you’ll need to carry your jet ski. You can transport your jet ski using a jet ski trailer.  A 1 ⅞ inch or 2-inch ball is typically required for Jet Ski trailers.

If you don’t have a trailer, bring one. if you have one, that’s superb. With the proper use of the ball, you can eliminate many potential problems associated with towing a jet ski. It is important to avoid using too large of a ball or one that is not the proper size, as it can cause problems when attaching the jet ski.

People make the most common mistakes by choosing the incorrect size of the ball. Before selecting the correct hitch ball size, you have to know about the standard sizes of the trailer ball hitch.

What Size Hitch Ball for Jet Ski Trailer

Sizes of the trailer hitch ball

Trailer hitch ball sizes are measured in a variety of sizes. They demand based on the weight capacity of your trailer.

1-⅞ inch trailer hitch ball: This size is preferred for light-duty towing. The towing capacity of this size is up to 2000 lbs.

2-inch trailer hitch ball: This size is suggested for medium-duty towing. This size has a towing capacity ranging from 3500 to 8000 lbs.

2-5/16 trailer hitch ball: This size is ideal for heavy-duty towing. This size has a towing capacity of 6000 to 40000 lbs.

Hitch ball size for single jet ski trailer

A single jet ski trailer typically weighs between 170-300 pounds and can carry up to 1,800 pounds.  Depending on the model, the jet ski and trailer weigh between 500 and 1500 pounds. As a result, 1-⅞  inch is preferable for a single ski jet trailer.

Hitch ball size for double jet ski  trailer

A double jet ski trailer can weigh between 300 and 600 pounds and has a weight capacity of 2,000 to 3,000 pounds. For a double ski jet trailer, a 1-⅞  inch trailer hitch ball is advisable. It’s also possible to use a 2-inch hitch ball.

These figures can vary depending on the size, material, and other factors affecting a trailer. 

Things to consider before choosing trailer hitch ball size

There are several factors to consider before deciding on the trailer ball size. The following is a detailed description of the most common items among them.

Match the Coupler Size to the Ball

Match the ball diameter to the coupler size. The correct trailer ball size is usually stamped or labeled on the coupler by the manufacturer. Before towing, ensure that your coupler and trailer ball is securely connected and that all necessary adjustments have been made.

Weight of the trailer

The ball size for a jet ski trailer is determined by the trailer’s and jet ski’s combined weight. The weight of a double jet ski trailer is heavier than a single jet ski trailer. Their weight-bearing capacity is also different. So you have to select the ball size according to your trailer weight capacity.

Ball capacity 

The maximum towing capacity, diameter, frame, or coupler of the hitch ball are usually listed on trailers. Towing a trailer requires a hitch ball with the same maximum capacity and diameter as listed. Choose the ball size according to the list.

Hitch ball diameter 

The diameter of a hitch ball must be the same as the diameter of the trailer coupler to prevent the trailer from bouncing loose. There are four different ball sizes available on the market.

Shank length and diameter

For different ball sizes, different shank lengths and diameters are preferred. A 1 ⅞ inch ball is required the Shank lengths ranging from 1 ⅝ inch to 3 inches and shank diameters ranging from ¾ inch to 1inch.

A 2-inch ball requires a 1-¾ inch to 3 inch  Shank Length and a ¾ inch to 1 ¼ inch  Shank Diameter.

The 2 5/16  inch ball requires Shank Length: 2 ⅛ inches to 3 ½ inches and  Shank Diameter: 1inch  to 2 inches.


Jet Ski trailers usually require a 1- ⅞ inch or 2-inch ball. However, other sizes may be required, so ensure to measure the coupler and confirm your hitch is equipped with the right size ball.

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About the Author: Brian Silvestro

Brian Silvestro is the founder and chief editor of OffroadersArena. He spends his free time tending to his BMW iX SUV and explaining its merits to anyone who'll listen.

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