How to Determine the Correct Sidewinder Pin Box for a 1991 Jayco Eagle 5th Wheel Trailer

Updated 09/06/2011 | Published 09/02/2011

Question:

Which sidewinder hitch will fit my 91 Jayco Eagle, I have a Reese Classic 14 Hitch mounted on a 2010 Tundra. Pin box dimensions are 13 7/8 wide and 11 1/4 deep hole spacing is 7 on center horizontal.

asked by: Ray B

Expert Reply:

To determine the correct Sidewinder for your 91 Jayco Eagle, we will need either the pin box manufacturer name and model number or all of the dimensions for mounting the pin box on the trailer.

The pin box manufacturer name and model number should be listed on the pin box and is normally on a sticker that is attached to the pin box. If the pin box is covered by molded plastic, you may need to remove some of the plastic to see the manufacturer name and model number. Once you have the name and model you can use the chart on our Sidewinder page, see link, to select the correct Sidewinder for your trailer.

If you cannot find the manufacturer name and model number on the pin box, dimensions will be needed. I have added a drawing showing all of the dimensions that are required to select the correct Sidewinder pin box for your trailer. The horizontal spacing your listed sounds correct at 7 inches on center, but the 13-7/8 inch width that you mentioned does not match to any Sidewinder conversions. Normally pin box widths are 8, 12, 12-1/2, 12-3/4 and 14 inches inside width, see drawing. If you can send me the dimensions from the drawing, see link, I can recommend the correct Sidewinder for your trailer.

Keep in mind that your hitch is rated for 14,000 lbs and that your trailer, fully loaded and ready to travel, will need to be below the capacity of the hitch.

expert reply by: Robert G