My Compact Jr. has leaf spring suspension. It was designed to be low so it could be parked in a garage with a standard 7' overhead door. This also means it has low ground clearance, with the floor being just 7" above the pavement. I am totally rebuilding it so I have the floor removed. Here is a picture showing a standard leaf spring
spring-under mount. The old solid square-bar
axle is clamped to the springs with the
springs under the axle:
Picture taken from the rear door.
I bought a new
axle that has
brakes and is a round hollow tube; not a square solid bar. I decided to see what it would be like with more ground clearance, so I mounted this
axle spring-over. The new round tube axle is clamped to the springs with the
springs over the axle:
Picture taken from the front window. (opposite direction)
This is what "Flipping the Axle" looks like.
The axle itself stays the same distance above the pavement, but the body of the trailer is now raised about 6 inches due to both the different orientation of the clamps to the springs plus the increased thickness of the round tube compared to the square bar. The body is now 13" above the pavement.
The down-side of doing this means that the body has now been raised too high to fit under a standard 7' overhead garage door.