3,500 lbs. Straight Spring Trailer Axle


All measurements are collected after purchase by a specialist. Price starts from plain axle (axle beam) and changes based on features. 

usually ships within 1 week.

48 hours available, see manufacturing speed.

This trailer spring axle has a 3,500 lbs capacity. Custom Built.

Select Spring Type *

Select Hub Type *

Select Brake Type *

Manufacturing Speed *

This is the time it takes to custom-build your axle before it’s shipped.

Select Shipping or Pickup *

Shipping: Some areas are out of our shipping zones: Hawaii, Alaska, Canada, and Zones out of the USA. If you’re still interested, we will quote you on shipping rates or refund your order.

If you already have measurements, notes or requests add them here. You do not need measurements to place an order. A team member will call to check your measurements. This ensures all orders are custom built to fit your trailer.

Shipping: Some areas are out of our shipping zones: Hawaii, Alaska, Canada, and Zones out of the USA. If you’re still interested, we will quote you on shipping rates or refund your order.

Overview: Discover the Blueswift 3500 lb Spring Axle, expertly engineered to cater to your specific trailer needs. This axle is not just a component; it's a solution, custom-built to ensure optimal performance and reliability for your trailer.

Key Features:

  • Robust Material and Construction: Constructed from a 2-⅜” x .180 wall thickness round steel tube, this axle is designed for strength and longevity. Ideal for both personal and light commercial use, it stands up to substantial loads with ease.
  • High Weight Capacity: Capable of supporting up to 3,500 pounds, this axle is versatile for a variety of hauling requirements, ensuring your load is securely supported.
  • Custom-Built Hub-to-Hub Face Length: Tailored to your trailer's exact dimensions, we offer custom-built lengths from 36” to 100”. This precision ensures a perfect fit, enhancing the stability and safety of your trailer.
  • Customized Spring Center: The spring center is custom-built to be 13” to 18” less than the hub face measurement, providing precise load alignment and balance for enhanced stability and safety.
  • Diameter Options for Your Needs: Select from the standard 2-⅜” outside diameter or opt for the 3” heavy-duty version, depending on your specific load requirements.
  • Quality Spindle and Bearings: Featuring a standard 3,500-pound E-Z lube spindle and durable L68149 inner and L44649 outer bearings, this axle is built for smooth, long-lasting operation.
  • Flexible Brake Assembly Configuration: Compatible with all major brand 10” x 2-¼” brakes, this axle offers a range of brake system choices for easy replacement or upgrade.
  • Diverse Brake Options: Choose from electric drum, hydraulic drum, or hydraulic disc brakes to best suit your trailer's needs, ensuring superior braking performance.
  • Spring Selection for Optimal Performance: Opt for the standard SW4B 1,750-pound 4 leaf double eye or the heavy-duty SW4 2,500-pound 4 leaf double eye springs, custom-selected for your axle.

Why Choose the Blueswift 3500 lb Spring Axle? The Blueswift 3500 lb Spring Axle represents a fusion of custom engineering and quality craftsmanship. Designed for both commercial and personal applications, this axle is tailored to enhance your trailer's performance and longevity. Choose Blueswift Axles for a custom-built axle solution that precisely meets your unique needs.



Spring Axles are an easy-to-install option. When replacing a spring axle there is no welding required! Spring Axles are ideal for their easy upkeep. Their replaceable components make them the more economical trailer option when compared to Torsion Axles.

Do you drive over gravel or uneven roads? Spring Axles use equalizers to distribute the weight of the load evenly over axles, especially with multi-axle configurations. Trailers carrying cargo over gravel or bumpy roads can depend on spring axles for stability.

If you are switching from a Torsion Axle to a Spring Axle there are extra measurements that our team can assist you with info@BlueSwiftAxles.com




  • Gravel
  • Bumpy Roads
  • Uneven Surfaces
  • Varying Load Weights


Maintenance and Repair:

Replacement components are available for wear and tear. Spring Axles are a better option for trailer owners and companies who want to avoid full axle replacement expenses.

All the wearing items are replaceable by unbolting and bolting on the new parts.


Spring axles use metal stacked leaf springs to support your trailer capacity. BlueSwift Axles carry a variety of Trailer Spring Axles from 2k-7K axle capacities.

don’t forget the u-bolts!

Don’t forget to replace your U-Bolt with your Axle Replacement.