Bimmerfest - BMW Forums - View Single Post - Towing Photos with X5.
View Single Post
Old 04-17-2013, 07:48 PM
digdesign digdesign is offline
Officially Welcomed to the 'Fest
Location: Boston
Join Date: Dec 2012
Posts: 106
Mein Auto: 2008 4.8i
Almost all ball mounts are designed to be mounted in either position depending if you need a drop or rise to get your trailer level. You'll see on the packaging that they're marked with both measurements. This one, for instance, is labeled "Ball Mount 3/4" Rise or 2" Drop" depending on how it's flipped.

What you need to do is level the trailer then measure the distance between the bottom of the trailer coupler and top of the receiver. That will tell you the amount of drop/rise you need. When I do this I usually round up, or add in a little fudge factor, anticipating that the rear of the tow vehicle will sag a bit when the trailer is connected.

Here's a decent overview on how to take the measurement.

It's really important to get your trailer level, especially if you're towing a dual axle trailer. When it's dropping too much in the front you put more of the load on the front wheels while the rear wheels are lifting a bit. It also shifts more weight onto the ball, which will be exaggerated when you go over bumps.

- Mick D.
Reply With Quote