I'm thinking mine was 22" from ground to inside of coupler. Where I have mine parked it's a little high in the back. I don't know if this is the correct way to measure, but I leveled the my TT, then ran a string under the tire and up to the front. I put a string level on the string and pulled string tight. Raised it until the level was level. Measured from the inside of coupler to the level string. It made sense to me. Mine looks level when I'm hooked up.
2015 Rockwood Windjammer 3029W Diamond Package
2014 RAM 2500 Laramie Longhorn 4 x 4
6.4 Hemi 410 HP, 410 Rear Axle