Ramp Assist Springs, HINGE MOUNT for 1 1/4" OD Shaft- each spring sold separatelyRamp Assist Springs, HINGE MOUNT for 1 1 4" OD Shaft These heavy duty ramp assist springs are designed to fit onto the ramp hinge shaft. They can become slack with age & sometimes need replacement. These springs will fit on a 1 1 4 in. OD" diameter shaft. They are made slightly larger, because they will get smaller when torgue is applied. When you are standing behind the trailer looking at the ramp, the left hand springs are on your left, the right