4500 West Irving Street
Wichita, KS 67209-2693
(316) 943-2386
Monday-Friday: 7:30 - 5:30

Spring Shop

Weather your fixing up the family SUV or restoring that classic Hot Rod... If you need a spring, give us a ring.
Although we have leaf springs in stock for just about any application, we have the facility to repair and manufacture from scratch. We can make that custom or hard to find leaf spring. All work is done "in house" including the heat treating.
In addition, we custom make U-bolts to fit your needs.

  1. How to identify and measure springs
  2. How to measure a U-Bolt and U-Bolt identification diagram

Spring Identification

The following information details the three ways in which a leaf spring may be identified for a specific application. These methods are listed in order of difficulty, therefore always attempt to identify by O.E.M. part number first before using identification by model or spring dimensions. In many cases the spring may be identified without the need for any measurements.

Identification by O.E.M part number:

How can the O.E.M part number be obtained? Use one of the following methods:

  1. Call the local dealer with the vehicle serial number
  2. Truck-build sheet (line setting sheet) will often list the front or rear spring
  3. Check the spring for a stamping number as follows:

Full Taper Springs: Part numbers may be found in one of these locations: (see illustrations below)

  1. On the end of the last leaf
  2. At the end of the wrapper
  3. On the side, bottom or top of the clip

Multi Leaf Springs: Part numbers may be found in one of these locations:

  1. On the side, bottom or top of the clip (most common)
  2. On the end of the shortest leaf
  3. On bottom of the last leaf beside the center bolt (sometimes this is hidden until the spring is removed)

Three Leaf Trailer Springs:

  1. On the outside of the hook

Identification by spring dimensions:

This is by far the most difficult way to identify a spring and should only be used if the first two methods detailed above are unsuccessful.

What are the important measurements?

  1. Main Leaf Length:
    1. Eye to Eye - Measured from the center bolt to the center of the eye in both directions along the arch.
    2. Eye to Slipper - Measured from the center bolt to the center of the eye and to the end where there is no eye along the arch.
    3. Slipper to Slipper - Measured from the center bolt to the end in both directions along the arch.
    4. Camel Back (used on Mack only) - Measured from the center bolt to the end of the main leaf in both directions along the arch.
    5. Single Point (5" wide springs used on heavy duty trailers) - Measured from the center bolt to the end of the main leaf in both directions along the arch. End hole size and distance from the center bolt must be checked.
  2. Spring Width:
    1. Measured at the center bolt from side to side across the leaf.

  3. Pack Thickness:
    1. Measured at the center bolt down the side of the spring including all leaves, tow eyes, shock eyes and pads. Do not include any cast wedges or brackets.
  4. Spring Arch: (always measure to the top of the main leaf, do not include any pads or spacers.)
    1. Eye to Eye - Use a straight edge to mark the center of the eyes and measure the arch at the center bolt.
    2. Eye to Slipper - Use a straight edge to mark the center of the eye and the top of the slipper and measure the arch at the center bolt.
    3. Slipper to Slipper - Use a straight edge on the top of the slipper ends and measure the arch directly over the center bolt.
    4. Camel Back and Single Point - Use a straight edge to mark the top of the main leaf in both directions and measure the arch at the center bolt.

  5. Eye Leaf Length: (radius leaf springs only)
    1. Measured from the center of the eye to the center bolt.

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