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Trailer Leaf Springs

We stock trailer leaf springs for all types of trailers including boat, utility, cargo, dump, construction, horse, roll-off, snowmobile trailers, and more. Our trailer springs are high quality and used by Original Equipment Manufacturers.

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  1. Harris
Grid List
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SKU HB-1103
$8.74
Leaf Spring Bushing | Harris | Toyota

Harris Style rubber leaf spring bushing HB-1103 is designed to replace your worn Toyota leaf spring ...   Details

Typically ships in 7 to 10 business days.
  • Leaf Spring Bushing Type:Harris
  • A-Outer Diameter:30mm
  • B-Length:46mm
  • D-Inner Diameter:18mm
  • C-Length:52mm
  • Automann Number:MH4493
  • Toyota Number:9038518017
  • UPC: 889626081392
  • MPN: HB-1103
SKU MH4481
$4.89
Leaf Spring Bushing | Harris

Harris style rubber leaf spring bushing MH4481 is designed for automotive leaf springs.   Details

Typically ships in 7 to 10 business days.
  • A-Outer Diameter:39mm
  • B-Length:38mm
  • D-Inner Diameter:22mm
  • C-Length:47mm
  • Vehicle Application:Nissan
  • Isuzu Number:8941133232
  • Mitsubishi Number:MB025153
  • Nissan Number:550460T000
  • UPC: 889626081293
  • MPN: MH4481
SKU HB-880
$1.83
Leaf Spring Bushing | Harris | Chevy/GM

Harris style rubber leaf spring bushing HB-880 is designed for automotive leaf springs.   Details

20+ In Stock
  • Leaf Spring Bushing Type:Harris
  • A-Outer Diameter:1.125 inch
  • B-Length:1.250 inch
  • D-Inner Diameter:0.625 inch
  • C-Length:1.750 inch
  • E-Outer Diameter:1.250 inch
  • Automann Number:MH2006
  • Dayton Number:HB-880
  • GMC Number:1460753, 559630
  • MPN: HB-880
SKU HB-1110
$4.57
Leaf Spring Bushing | Harris | Nissan

Harris style rubber leaf spring bushing HB-1110 is designed for Nissan automotive leaf springs.   Details

20+ In Stock
  • Leaf Spring Bushing Type:Harris
  • A-Outer Diameter:33mm (1.299 inch)
  • B-Length:32mm (1.26 inch)
  • D-Inner Diameter:20mm (0787 inch)
  • C-Length:38mm (1.496 inch)
  • Vehicle Application:Nissan, Used in Frontier and Xterra rear spring eye beginning 2005
  • E-Outer Diameter:42mm (1.654 inch)
  • Note:Used in springs 69-283, 69-285, 69-287, 69-289, 69-291, 69-293
  • Automann Number:MH4688
  • Nissan Number:55046-01G00, 5504601G00, 55047-EB301, 55047EB301, HB-1110, HB1110
  • MPN: HB-1110
SKU HB-1004
$3.30
Leaf Spring Bushing | Harris | Toyota

Harris style rubber leaf spring bushing HB-1004 is designed for Toyota automotive leaf springs.   Details

20+ In Stock
  • Leaf Spring Bushing Type:Harris
  • A-Outer Diameter:30mm
  • B-Length:30mm
  • D-Inner Diameter:18mm
  • C-Length:36mm
  • Note:For 2-3/8 inch wide spring. Fits Toyota Pickups such as 90-113, 90-161, 90-163. T100 pickups 90-147, 90-157, 90-159, 90-177
  • Automann Number:MH4476
  • Toyota Number:9038518046
  • MPN: HB-1004
SKU HB-387
$1.98
Leaf Spring Bushing | Harris | Ford

Harris style rubber leaf spring bushing HB-387 is designed for Ford automotive leaf springs.   Details

4 In Stock
  • Leaf Spring Bushing Type:Harris
  • A-Outer Diameter:1.000 inch
  • B-Length:1.250 inch
  • D-Inner Diameter:0.500 inch
  • C-Length:1.688 inch
  • Vehicle Application:AMC, Ford, Mercury
  • E-Outer Diameter:1.250 inch
  • Note:For 2-1/2 inch wide spring
  • Automann Number:MH1020
  • Ford Number:C4GA5781A
  • MPN: HB-387
SKU HB-930
$2.48
Leaf Spring Bushing | Harris | Chevy/GM

Harris style rubber leaf spring bushing HB-930 is designed for Chevy and GMC automotive leaf springs...   Details

4 In Stock
  • Leaf Spring Bushing Type:Harris
  • A-Outer Diameter:1.125 inch
  • B-Length:1.438 inch
  • D-Inner Diameter:0.563 inch
  • C-Length:1.938 inch
  • Manufacturers Part Number:3890386
  • Automann Number:MH2106
  • Chevrolet / GM Number:3890386
  • MPN: HB-930
SKU HB-1000
$3.93
Leaf Spring Bushing | Harris | GM

Harris style rubber leaf spring bushing HB-1000 is designed for GM automotive leaf springs.   Details

20+ In Stock
  • Leaf Spring Bushing Type:Harris
  • A-Outer Diameter:1.563 inch
  • B-Length:1.375 inch
  • D-Inner Diameter:0.563 inch
  • C-Length:2.375 inch
  • Vehicle Application:Buick, Cadillac, Chevrolet, Oldsmobile, Pontiac
  • E-Outer Diameter:1.875 inch
  • Note:For 2-1/2 inch wide spring
  • Automann Number:MH4468
  • Chevrolet / GM Number:480902, 499473
  • MPN: HB-1000
SKU HB-1109
$6.25
Leaf Spring Bushing | Harris | Nissan

Harris Style Rubber Leaf Spring Bushing HB-1109 is designed for the front of Nissan Frontier and Xte...   Details

6 In Stock
  • Leaf Spring Bushing Type:Harris
  • A-Outer Diameter:40mm
  • B-Length:33.02mm
  • D-Inner Diameter:17.5mm
  • C-Length:38.45mm
  • E-Outer Diameter:47mm
  • Note:For 60mm Wide spring, Metric Bushing. Fits 1998-2004 Nissan Frontier and Xterra front spring eye. Used in leaf spring 69-277.
  • Automann Number:MH4686
  • Nissan Number:50458B400, 550458B400
  • UPC: 889626081163
  • MPN: MH4686
SKU HB-389
$2.30
Leaf Spring Bushing | Harris | Ford

Harris style rubber leaf spring bushing HB-389 is designed for Ford automotive leaf springs.   Details

1 In Stock
  • Leaf Spring Bushing Type:Harris
  • A-Outer Diameter:1.000 inch
  • B-Length:1.000 inch
  • D-Inner Diameter:0.500 inch
  • C-Length:1.438 inch
  • Vehicle Application:Ford, Mercury
  • E-Outer Diameter:1.250 inch
  • Note:For 2 inch wide spring
  • MPN: HB-389
SKU HB-889
$1.82
Leaf Spring Bushing | Harris | Chrysler, Dodge, Ford

Harris style rubber leaf spring bushing HB-889 is designed for Chrysler, Dodge and Ford automotive l...   Details

20+ In Stock
  • Leaf Spring Bushing Type:Harris
  • A-Outer Diameter:1.000 inch
  • B-Length:1.250 inch
  • D-Inner Diameter:0.563 inch
  • C-Length:1.750 inch
  • Vehicle Application:Chrysler, Dodge, Ford, Dodge Truck, International, Jeep
  • E-Outer Diameter:1.250 inch
  • Note:For 2-1/2 inch wide spring
  • Automann Number:MH2024
  • Chrysler Number:5355841, 939797
  • Dodge Number:1400269, 2403154, 3643989
  • Ford Number:MG5791A
  • International Number:165743R1, 166743R1
  • Jeep Number:3643989, 939797
  • Moog Number:HR106, HR889, K7308
  • MPN: HB-889
SKU HB-996
$1.75
Leaf Spring Bushing | Harris | Chevy/GM | Jeep

Harris style rubber leaf spring bushing HB-996 is designed for Chevy, GMC and Jeep automotive leaf s...   Details

12 In Stock
  • Leaf Spring Bushing Type:Harris
  • A-Outer Diameter:1.125 inch
  • B-Length:1.375 inch
  • D-Inner Diameter:0.750 inch
  • C-Length:2.00 inch
  • E-Outer Diameter:1.250 inch
  • Note:Used in 1970 on 4X4 Front Spring
  • Automann Number:MH2238
  • Chevrolet / GM Number:3975203
  • Jeep Number:5355966
  • MPN: HB-996

what is a trailer leaf spring?

The springs on your trailer act as the connection between the axle and the frame. They allow a built-in “give” in the suspension that allows the axle to move up and down without allowing side to side movement. Without a spring, the axle and frame would be rigidly mounted leaving only the tires to absorb the shock from the road and the weight that the trailer is carrying. This would quickly lead to broken components.

In this video, we show how to identify and measure trailer leaf springs. Identifying and Measuring Leaf Springs

Trailer springs are leaf springs. The spring is composed of one or more thin pieces of steel or “leaves” which are curved in an arch. The number and thickness of the leaves determine the amount of weight the spring can carry. The curve of these leaves is the arch of the spring which controls the ride height of the trailer. In most trailer configurations the springs will sit below the axle, this is known as underslung. An underslung suspension lowers the ride height which can dramatically increase the stability of a trailer. In some 5th wheel and gooseneck campers, the suspension will be overslung with the springs above the axle. This brings the ride height up and allows the trailer to connect to the in-bed hitches.

What are the benefits of leaf springs on a trailer?

A leaf spring trailer suspension is inexpensive and easy to maintain. The two main types of light trailer suspension are leaf spring and torsion axle. A torsion axle uses a two-piece square axle with rubber cords inside. This allows the axle to twist inside of itself acting as a spring. A torsion axle is simple, but it is non-serviceable, meaning that when it fatigues the entire assembly must be replaced. A leaf spring suspension has the benefit of individualized components. This means that if one component wears or fails it can be replaced on its own and the entire system will function as new. This can result in significant cost savings over the life of the trailer. A spring suspension can be configured in a single axle, a tandem (2 axle), and a tri-axle (3 axle). This gives each wheel its own spring and allows it to move independently from others which makes it better suited for use on uneven ground. Maintenance can be done on a spring suspension and parts are easily changed where a torsion axle is replaced as an entire unit and will require welding and re-alignment of the trailer to prevent dog tracking.

Why do trailer springs need to be replaced?

The springs do a huge amount of work. When your trailer is moving the springs are moving and as the metal leaves are flexed back and forth constantly they will begin to fatigue. With age, a spring will wear and lose arch. If one side of the trailer has seen more weight than the other this may present itself by causing a lean. If all springs have worn evenly the trailer may be sitting lower than it once did. This may limit suspension travel and cause the trailer to bottom out. Some springs may wear to a point that one or more leaves may break causing a potentially hazardous situation where the axle is no longer fully attached to the trailer. Situations like this can be prevented by including your trailer spring in your normal trailer maintenance.

broken trailer spring

How do I inspect my trailer springs?

Trailer springs are composed of many individual pieces that all play a role in the function of the spring. Knowing what to look for while doing maintenance and making the necessary repairs can keep you from being stuck on the side of the road. Below is a list of items that indicate problems with your trailer springs, these should be remedied before using your trailer further.

Broken or Cracked Spring Leafs

As springs wear there is a potential for leaves to crack or break. When inspecting for this look for portions of leaves that are missing or gaps along the length of the leaf. A crack will appear as a dark line that is perpendicular to the length of the spring. When a leaf cracks you lose the strength of this leaf and the puts additional stress on the other leaves. This may cause a domino effect where other leaves begin to break resulting in the potential for a hazardous situation. The entire spring should be replaced and replacing the other spring on that axle should also be strongly considered. Finding a crack in one leaf is a good excuse to thoroughly inspect the other springs and look for similar damage.

trailer leaf spring

Crooked Springs

You may run across a spring with the leaves fanned out instead of lined up neatly. This is due to loosened U-bolts. Without the correct clamping pressure, the springs may freely shift and this can cause issues. Without all the leaves in the pack aligned the spring will be weaker. This can cause damage to the spring or even bend the spring. If the spring is bent it should be replaced, metal fatigue will cause this spring to break rather quickly after a bend is placed in one of the leaves. The U-bolts should also be replaced if found loose. U-bolt torque should be checked as part of a regular maintenance schedule to prevent this from happening.

Worn Bushings

Anywhere that a spring accepts a bolt will use a bushing to prevent wear on the steel used in the spring. On trailer springs these will normally be a nylon material or a rubber bushing with a steel sleeve. As the spring flexes it pivots on this bolt and over time the friction between the bolt and bushing will wear at the material. A rubber bushing may show wear of the inner sleeve or deterioration of the rubber. Any of these bushings can be checked by gently prying on the spring near bushing and looking for excessive movement. Any movement in the bushing translates to movement in the axle and this may wear tires or cause dog tracking. Dog tracking is a condition where the trailer will not follow behind the tow vehicle and may try to steer itself out of your lane. If the wear is limited to only the bushings they can be replaced, and the trailer will function like new. If the wear has moved through a bushing and had damaged a spring, the entire spring should be replaced.

Leaf Spring

Excessive Corrosion

All trailer leaf springs are made of steel and they will eventually rust. This can be an issue with trailers used during winter months in states that use salt on the roads or especially on boat trailers used in salt water. This will normally show as surface rust and the structural integrity of the spring will not be affected. In some cases, the corrosion may worsen and begin to weaken the spring. Pitting of the springs is abnormal and will weaken the material, pitting can lead to leaf breakage and a pitted spring should be replaced. Over time corrosion may occur between the leaves of the spring forcing them apart. This weakens the spring considerably as they are no longer working together to support the load of the trailer. A spring with the leaves splayed out instead of together in a tight group should be replaced.

Leaf Spring

Broken Center Bolt

The center bolt runs through the center of the spring pack and holds it together for assembly and centers it in the axle. If U-bolts are loosened the center bolt will take extra load and may break allowing the spring to shift on the axle. The center bolt should be replaced as well as the U-bolts. U-bolt torque should be checked as part of a regular maintenance schedule to prevent loosening.

for more information on how to measure replacement trailer leaf springs click here.

Trailer Leaf Springs Reviews

Out of 33 reviews, the average customer rating for Trailer Leaf Springs: 4.9 out of 5.

trailer spring una-210 reviewer
Trailer Leaf Springs - UCF UNA-210 Rating: 5 Stars

I Would Definitely Buy Again.

Product worked great. As advertised. Web site was very easy to use.

Read the Review

trailer spring - slipper - flat end una-193 reviewer
Trailer Leaf Springs - UCF UNA-193 Rating: 5 Stars

Right Purchase At The Right Place

We needed springs for our little trailer since we had one give out during a remodel of rental. The descriptions were detailed and accurate so we could pick the spring we could use. The delivery was prompt.

Read the Review

trailer spring - slipper - flat end una-014 reviewer
Trailer Leaf Springs - UCF UNA-014 Rating: 5 Stars

AMAZING CUSTOMER SERVICE AND GREAT PARTS

At 1st I was kind of skeptical when ordering the parts, given I know anything about trailer parts. So i called and the customer service was AMAZING, and very knowledgeable. Once I started the process of installing the springs everything went together smooth. I will ALWAYS lo...

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trailer spring una-121 reviewer
Trailer Leaf Springs - UCF UNA-121 Rating: 5 Stars

I Will Buy From Here Again.

Great product. I should have done this project two years ago.

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trailer spring una-221 reviewer
Trailer Leaf Springs - UCF UNA-221 Rating: 5 Stars

Yes

I got this product for a freind. his fish house lowers off it. caint waite to go fishing!

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trailer spring una-052 reviewer
Trailer Leaf Springs - UCF UNA-052 Rating: 5 Stars

If Needed I Would Definitely Purchase From Michigan Spring

The springs were top notch, I had to move the front hangers, but I knew that going in to the repairs on my trailer, my boat has never been easier and safer to road.

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trailer spring - slipper - hook end una-197 reviewer
Trailer Leaf Springs - UCF UNA-197 Rating: 5 Stars

I Would Buy Again If Needed

They arrived when when they were supposed to and were just what I was wanting .

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trailer spring una-051 reviewer
Trailer Leaf Springs - UCF UNA-051 Rating: 5 Stars

Nice Spring Fast Ship

As good as original

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trailer spring una-032 reviewer
Trailer Leaf Springs - UCF UNA-032 Rating: 5 Stars

Thank You, For My Replacement Springs.

I had a hard time finding this spring size. Thanks for the items and quick response.

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trailer spring - slipper - flat end una-014 reviewer
Trailer Leaf Springs - UCF UNA-014 Rating: 5 Stars

Works Great And Installs Easily

Thesespring both look and work great. Replaced some 2-leaf springs with these.

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trailer spring una-220 reviewer
Trailer Leaf Springs - UCF UNA-220 Rating: 5 Stars

Heavy Duty Spring

Spring was precise on the dimensions. I purchased the spring to replace a busted spring on my trailer, which was an easy installation. If another existing spring breaks I will undoubtedly purchase another. These springs appear more durable than the springs that came with my trailer.

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trailer spring una-022 reviewer
Trailer Leaf Springs - UCF UNA-022 Rating: 5 Stars

They Are Working Great On The Trailer I Installed Them On.

They beefed the trailer up to haul more.

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trailer spring una-052 reviewer
Trailer Leaf Springs - UCF UNA-052 Rating: 5 Stars

Replacment For A 2" Wide Spring

these springs were used to replace 2" wide springs. The trailer weighed 3,200 lbs. empty

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trailer spring - slipper - radius end una-034 reviewer
Trailer Leaf Springs - UCF UNA-034 Rating: 5 Stars

Worked Well. I Used These Springs To Rebuild An Old TeeNee

I rebuilt an old TeeNee trailer. I could not find the right springs anywhere. These worked great.

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trailer spring - slipper - flat end una-016 reviewer
Trailer Leaf Springs - UCF UNA-016 Rating: 5 Stars

I Would Definitely Use Michigan Truck Spring Again

Great leaf springs at a great price!

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Replacing Trailer Springs? You Might Need:

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Trailer Spindle Hardware View Details
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Measuring Trailer Leaf Springs View Details
Measuring Trailer Leaf Springs

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