How To Select Replacement Trailer Leaf Springs

Select the correct replacement trailer leaf spring

How to select the correct replacement leaf spring for your trailer

Buying replacement parts for your trailer isn’t always the easiest thing to do. More often than not, you don’t know what to call a particular part and you certainly don’t know which type or size you need. Our goal is to make buying replacement parts easier for our customers. In this article, we are going to tackle how to select the correct replacement leaf spring for your trailer.

First things first, you need to determine which type of leaf spring you need. There are 5 different types of leaf springs that fall under two main categories – double eye leaf springs and slipper springs.

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Notice that all of the springs shown have a bolt “eye” on the front end of the spring. That is how the spring attaches to the trailer frame. The other end of the leaf spring is more interesting. Notice that all of the springs are arched. When your trailer is loaded and you are driving along, the spring moves up and down vertically as your tires hit bumps and variations in the road. This up and down movement “flattens” out the spring causing it to grow in length. The spring is attached in a fixed position on the front end, so the back end moves back and forth. The slipper springs slide (or slip) back and forth against a stationary surface to easily compensate for the changes in length. The stationary surface can be a specific bracket attached to the trailer frame, or sometimes the trailer frame itself is used as the contact surface of a slipper spring. Here is an example of a slipper spring attachment on the moveable back end:

 

HookDownSlipperSpringContact Point

Double Eye leaf springs get their name because they have a bolt eye on both the front and back of the spring. This type of spring deals with the changing length by adding pivoting shackle links to the rear of the spring. Here is an example:

DoubleEyeSlipperSpringShackleLink

Now that you know the different types of leaf springs, you can select the appropriate style and move on to measuring for the correct replacement. The number of leaves and the weight capacity of the spring is also very helpful to know.

Here are some terms that are important to know regarding leaf spring measurements:

Overall Length – The complete overall length from one end to the other

Length – Depending on the type of spring the length is determined slightly differently. Double eye leaf springs are measured from center of eye to center of eye. Open eye slipper springs are measured from center of eye to center of open eye. The remaining types of slipper springs (flat end, radius end & hook down) are measured from center of eye to contact point. (See below for the 3 different length measurement diagrams)

Axle Location – The axle location is measured from center of eye straight across to the point where the leaves are all bolted together.

Stack Height – The thickness of the springs where all leaves are stacked.

Width – The width of the leaf spring.

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 Use the charts below to find the correct leaf spring for your trailer. Just click on the part number and you will be taken directly to that leaf spring on our online trailer parts store.

Double Eye Leaf Springs
Part # Leaves Capacity Overall Length Length Width Stack Height Axle Location
FRA-1726 5 2500 27.25” 26” 1.75” 1.75” 13”
TDE-81199 4 2500 26.75” 25.25” 1.75” 1.50” 12.5”
UGC-UNA-111 5 3000 27” 25.25” 1.75” 2.01” 13”
UGC-UNA-167 4 1400 22” 20.5” 1.75” 1.13” 10.5”
UGC-UNA-168 3 700 21.75 20.25” 1.75” 0.67” 10.5”
UGC-UNA-169 3 1000 21.5” 20.25” 1.75” 0.79” 10.5”
UGC-UNA-210 4 2100 28.5” 27” 1.75” 1.38” 13.5”
UGC-UNA-212 4 1750 26.5” 25.25” 1.75” 1.27” 13”
UGC-UNA-216 3 1750 24.5” 23.25” 1.75” 1.08” 12”
UGC-UNA-217 3 1500 26.75” 25.25” 1.75” 1.04” 13”
UGC-UNA-219 3 1250 26.5” 25.25” 1.75” 0.94” 13”
UGC-UNA-220 3 2000 26.75” 25.25” 1.75” 1.16” 13”
UGC-UNA-221 4 3000 26.75” 25.25” 1.75” 1.5” 13”
UGC-UNA-223 6 3500 26.5” 25” 1.75” 2.05” 13”
Flat End Slipper Leaf Springs
Part # Leaves Capacity Overall Length Length Width Stack Height Axle Location
DEX-072-010-01 6 4500 30” 28” 1.75” 2.52” 14.50”
TDE-81197 2 1000 30” 28” 1.75” 0.69” 13.5”
TDE-81198 4 1850 30” 28” 1.75” 1.44” 13.5”
UGC-UNA-039 3 1400 30” 29” 1.75” 1” 13.5”
Radius End Slipper Leaf Springs
Part # Leaves Capacity Overall Length Length Width Stack Height Axle Location
DEX-072-021-00 5 5000 30” 29” 2.50” 2.14” 12”
TDE-81194 2 500 24 5/8” 23.5” 1.75” 0.44” 11”
TDE-81196 4 1000 24 5/8” 23.5” 1.75” 1” 11”
UGC-UNA-178 3 750 25” 23” 1.75” 0.63” 11”
UGC-UNA-179 4 950 25” 22” 1.75” 0.88” 11”
UGC-UNA-180 5 1250 25” 22” 1.75” 1.13” 11”
Open Eye Slipper Leaf Springs
Part # Leaves Capacity Overall Length Length Width Stack Height Axle Location
FRA-1701 3 825 23.75” 22” 1.75” 0.75” 11”
FRA-1706 6 3300 28.25” 26.5” 1.75” 2.13” 13”
FRA-1707 4 1400 25.5” 24” 1.75” 1.13” 12”
UGC-UNA-263 3 1750 28” 26.5” 1.75” 1” 13”
UGC-UNA-264 4 2350 28” 26.5” 1.75” 2.38” 13”
Hook Down Slipper Leaf Springs
Part # Leaves Capacity Overall Length Length Width Stack Height Axle Location
TRP-SH-7230 4 2000 31.25” 26.5” 2” 1.25” 14”
TRP-SH7232 5 3500 27.5” 25” 2” 1.25” 11.50”
UGC-UNA-231 4 2500 27.5” 25” 2” 1.44” 11.50”
UGC-UNA-232 5 3500 26.5” 24” 2” 1.80” 11.50”
UGC-UNA-285 7 4000 28” 25” 2” 2.52” 11.50”

 


Based in Centreville, Maryland, Centreville Trailer Parts LLC wants to be a leader for all things needed to keep trailers in good working order. We have parts for all kinds of trailers, such as boat trailers, car trailers, enclosed trailers, horse trailers and large tractor trailers. When a part is needed, but doesn’t exist, we will actually make those parts and offer them for sale. Centreville Trailer Parts LLC has local trailer parts stores serving customers in Maryland & Virginia and online trailer parts store serving customers worldwide.