The inside tubes are interchangeable. This allows you to change from one inside tube to another if you choose. For example, you could change from a 3 inch drop to a 4 inch drop or a 3 inch to a 4 inch or a standard up and down post to a multiposition post just by changing the inside tube. You would need to purchase the other inside tube. The change takes about 30 seconds to perform and is very easy.


If you have any additional questions call Customer Service at 406.883.3555
or email us at
sales@gravitydropper.com