 Trailer Balls and Ball Mounts
...the critical connection between you and your trailer
And these are the couplers-keep them in mind as you read this
TRAILER BALLS
Trailer balls come in different diameters and varying shank sizes, depending upon their rated capacity. Generally, the larger the ball diameter and shank size, the higher the capacity. 1-7/8-inch and 2-inch are, by far, the most common sizes. 1-7/8" trailer balls are rated for Class I or II towing. 2" trailer balls are rated for Class towing. Class IV trailer balls have either 2" or 2-5/6" diameters.
So how do you know what trailer ball to use? If you have a Class I,II or III hitch, you'll probably use a 1-7/8" or 2" trailer ball, depending upon the coupler into which the ball fits. You must also match the shank size of the trailer ball to the ball mount. Shank size is either 3/4" or 1". Choose your trailer ball accordingly.
 BALL MOUNTS
| These insert into the receiver tube of a hitch and provide a mounting platform for the trailer ball. The shank size of the trailer ball must match the hole in the ball mount. Ball mounts come with either 3/4-inch or 1-inch diameter holes. So, according to the laws of physics, if your ball mount has a 1-inch diameter hole, the shank size of the trailer ball had better be 1-inch. So you see...Einstein was right! Now, for the really good stuff. |
 | Ball mounts are made to provide either a rise or a drop. The flat "tongue"area of the ball mount is offset from the centerline of the receiver tube. If you insert the ball mount with the tongue down, you get a drop. Inserting it with the tongue up gives you a rise relative to the centerline of the receiver tube. OK, now we know this much... what does it all mean? |
 | You want your trailer to be level with the car or truck towing it. If it's not, you need to lower the trailer ball. Turning the ball mount around lets you do this and get everything leveled up. Ball mounts come with varying rise/drop ranges, so you can get just the right amount of either. The diagram below shows you how to determine what ball mount is suitable for your towing needs. |
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