Leaf Springs

A trailer trailer leaf spring is used for vehicle & trailer suspension. It consists of a stack of slightly curved narrow steel strips which are called "leaves". The curve in the steel allows it to absorb the energy transmitted through the tires by the bumps on the road. There are two types of leaf springs:

Double Eye Leaf Springs are used with the shackle-type suspensions.

Slipper Leaf Springs are the heavy-duty springs used with slipper-type suspensions.

HOW TO CHOOSE THE RIGHT TRAILER LEAF SPRING?

When selecting a trailer leaf spring for a new trailer, or matching to replace an old spring you need to take the following measurements into account:

1. Width of spring: A measurement across the bottom of the spring leaves. Corresponds with the width of the spring seats

2. Free Length: A measure of the length of the spring from eye to eye (or eye to end of slipper for a slipper spring)

3. # of Leaves: A count of the number of strips of steel stacked together. Count at the centre point.

4. Flat Length: A length measurement which follows the actual contour of the spring. This measure is better than the Free Length measurement because old/used springs "relax" after use. Flat length is measured by taking the length from the centre of one eye to the centre bolt on the sping, repeating on the other side, then adding the two together.

5. Eye Size: When building a trailer, the eye size of the spring is necessary to select the other hardware pieces that bolt to the spring.

Here are a few examples of suggested leaf springs based on some given measurements.  If you need any assistance please contact our team.