If your utility trailer is sagging, bouncing, or showing signs of wear, the leaf springs are likely the culprit. These unsung heroes support your load and absorb road shock, making them essential for safe towing.
This guide compares five top leaf spring options to help you find the right fit for your trailer. We’ll cover key specs like capacity, length, and end type so you can make an informed choice.
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Dorman 929-1031 – 2000 lb 4-Leaf Replacement
Brand: Dorman
A reliable, direct-fit 2000 lb spring for medium-duty trailers.
The Dorman 929-1031 is a solid choice for trailers needing a 2000 lb capacity. With a 26-inch length and 4.25-inch arch, it’s designed to match original equipment on many trailers. The 4-leaf construction provides a good balance of strength and ride quality, making it ideal for medium-duty loads like landscaping equipment or small boats.
Dorman’s reputation for quality aftermarket parts means you can trust this spring to hold up over time. It’s a direct replacement for damaged or worn springs, so installation is straightforward. If your trailer’s original springs are 26 inches eye-to-eye and you need 2000 lbs of support, this is a reliable option.
- Direct fit replacement
- Durable construction
- Trusted brand
- Eye/eye only
- May be stiff unloaded
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- Direct replacement – these leaf springs are designed to match the fit and function of the original leaf springs on specific vehicles or trailers
- Ideal solution – seamlessly replaces leaf springs damaged by overloading, collision, cracking or corrosion, or are due for replacement
- Durable construction – made from quality materials to strict specifications to ensure reliable performance and long service life
- Trustworthy quality – engineered, manufactured and supported by the premier aftermarket leaf spring provider in the USA
- Support available – every Dorman part is backed by Dorman's ASE Blue Seal Certified technical support team
Dorman 929-1002 – 1400 lb Compact Spring
The Dorman 929-1002 is a shorter, lighter-duty option at 20.5 inches long with a 1400 lb capacity. Its 3.375-inch arch and 4-leaf design make it suitable for smaller utility trailers, such as those used for hauling garden supplies or small furniture. The eye/eye end type is common on many light trailers.
If your trailer’s original springs are around 20.5 inches and you don’t need heavy capacity, this spring is a perfect match. Dorman’s engineering ensures it fits and functions like the original, so you can replace worn or damaged springs without modification. It’s a great choice for keeping a smaller trailer roadworthy.
- Compact size
- Quality construction
- Easy installation
- Lower capacity
- Shorter length may limit fit
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- Direct replacement – these leaf springs are designed to match the fit and function of the original leaf springs on specific vehicles or trailers
- Ideal solution – seamlessly replaces leaf springs damaged by overloading, collision, cracking or corrosion, or are due for replacement
- Durable construction – made from quality materials to strict specifications to ensure reliable performance and long service life
- Trustworthy quality – engineered, manufactured and supported by the premier aftermarket leaf spring provider in the USA
- Support available – every Dorman part is backed by Dorman's ASE Blue Seal Certified technical support team
Dorman 929-1072 – 2250 lb Eye/Loop Spring
The Dorman 929-1072 offers a 2250 lb capacity with a unique eye/loop end configuration. At 26.25 inches long and 3.5 inches arch, it’s designed for trailers that need extra strength, such as those carrying heavy equipment or materials. The loop end provides a different mounting option that some trailers require.
This spring is built to Dorman’s high standards, ensuring reliable performance under heavy loads. If your trailer uses a loop end on one side and you need a 2250 lb capacity, this is a direct replacement. It’s a robust choice for demanding applications where standard springs might not suffice.
- 2250 lb capacity
- Durable 4-leaf build
- Trusted brand
- Loop end may not fit all
- Slightly longer length
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- Direct replacement – these leaf springs are designed to match the fit and function of the original leaf springs on specific vehicles or trailers
- Ideal solution – seamlessly replaces leaf springs damaged by overloading, collision, cracking or corrosion, or are due for replacement
- Durable construction – made from quality materials to strict specifications to ensure reliable performance and long service life
- Trustworthy quality – engineered, manufactured and supported by the premier aftermarket leaf spring provider in the USA
- Support available – every Dorman part is backed by Dorman's ASE Blue Seal Certified technical support team
Trailer Supplies Pair – 1500 lb 3-Leaf Set
Brand: TRAILER SUPPLIES
A great value pair for 1500 lb single-axle trailers.
The Trailer Supplies pair of 24.25-inch 3-leaf springs is a cost-effective solution for single-axle trailers rated at 1500 lbs. Each spring supports 750 lbs, giving a combined capacity of 1500 lbs. The radius end design fits many standard trailer axles, and the included bushings (9/16-inch inner diameter) make installation easier.
These springs are a direct replacement for popular models like Dexter 4331-07B and UNA-178. The 3-leaf construction provides a smoother ride under lighter loads, making them ideal for smaller trailers used for camping gear or light cargo. If you’re on a budget and need a pair of springs, this set is a practical choice.
- Sold as a pair
- Includes bushings
- OEM compatible
- Only 3 leaves
- Lower capacity per spring
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- Heavy-Duty Load Capacity – Each 3-leaf spring supports up to 750 lbs; combined 1,500 lbs capacity for a single axle trailer.
- Standard Size Fit – Measures 24-1/4" from eye center to hook end, with 1-3/4" wide spring profile to fit most 1.5K trailer axles.
- Durable Construction – Includes high-strength black bushings (9/16" inner diameter); built to absorb road shock and provide a smoother ride.
- OEM Replacement Codes – Direct replacement for Dexter 4331-07B, UNA-178, UNA-203 and compatible with TS820-3, WE-3, WIE-3, LR24503F, and other popular models.
- Universal Application – Ideal for single axle utility trailers, boat trailers, cargo haulers, and other light-duty applications.
Dorman 929-1033 – 2500 lb 5-Leaf Heavy Duty
The Dorman 929-1033 is the heavy hitter of this group, with a 2500 lb capacity from its 5-leaf design. At 26 inches long and 4.25 inches arch, it’s built for the toughest jobs, like hauling heavy machinery or large loads. The extra leaf provides added strength and stability, reducing sag under maximum weight.
Dorman’s engineering ensures this spring matches original equipment, so it’s a straightforward replacement for worn or damaged springs. If your trailer needs to handle up to 2500 lbs per spring, this is the most robust option available. It’s built to last, with quality materials that resist cracking and corrosion.
- Highest capacity
- 5-leaf durability
- Direct fit
- Stiffer ride
- Heavier weight
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- Direct replacement – these leaf springs are designed to match the fit and function of the original leaf springs on specific vehicles or trailers
- Ideal solution – seamlessly replaces leaf springs damaged by overloading, collision, cracking or corrosion, or are due for replacement
- Durable construction – made from quality materials to strict specifications to ensure reliable performance and long service life
- Trustworthy quality – engineered, manufactured and supported by the premier aftermarket leaf spring provider in the USA
- Support available – every Dorman part is backed by Dorman's ASE Blue Seal Certified technical support team
Buyer’s Guide: What to Consider
Choosing the right leaf springs for your utility trailer ensures safe towing and a smoother ride. This guide covers key factors like capacity, length, and end type.
- Load Capacity: The total weight your trailer will carry, including the trailer itself. Match the spring capacity to your axle rating for safe operation.
- Spring Length: Measure from eye center to eye center (or eye to hook end) to ensure proper fit. Common lengths range from 20.5 to 26.25 inches.
- End Type: Eye/Eye springs have two eyes for shackles; Eye/Loop has one eye and one loop. Choose based on your trailer's mounting style.
- Number of Leaves: More leaves generally mean higher capacity but a stiffer ride. 3-leaf springs offer moderate capacity, while 4- or 5-leaf springs handle heavier loads.
- Arch Height: The arch height affects ride height and clearance. A higher arch lifts the trailer, while a lower arch lowers it. Measure your current setup.
Conclusion
Selecting the right leaf springs is crucial for your trailer’s performance and safety. Whether you need a heavy-duty 5-leaf set or a standard 4-leaf replacement, the options above cover a range of capacities and sizes.
For most utility trailers, the Dorman 929-1031 offers a reliable 2000 lb capacity, while the Dorman 929-1072 provides a higher 2250 lb capacity with a loop end. Always verify your trailer’s specifications before purchasing.