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2.5 inch DOM trailing arm 48 inch on a white background
long travel trailing arm DIY kit components including tubes, bearings, and hardware on a white background.
off-road trailing arm with 7075 aluminum insert on a white background
Close-up of heavy duty DOM trailing arm suspension welded on a rod with text indicating examples of a finished unit.
rock crawler long travel trailing arm diy kit with text &
2.5 inch DOM long travel trailing arm on a perforated metal surface with text &

WOD 2.5" x 48" DOM Tube Trailing Arm DIY Kit

WA01042-48

$1,599.00
/
Shipping calculated at checkout.

The WOD 2.5" x 48" DOM Tube Trailing Arm DIY Kit gives fabricators a strong, lightweight foundation for building custom long-travel rear suspension systems. Designed around a 2.5" O.D. x .250" wall DOM steel tube and reinforced with a precision-machined 7075 aluminum internal insert, this kit delivers exceptional strength while minimizing unnecessary weight for demanding off-road applications.

Engineered for coilover and bypass shock suspensions, the kit includes premium suspension components with a heavy-duty 1.25" shank rod end at the chassis end and a large chromoly bearing at the axle end. Custom high-misalignment spacers maximize suspension articulation while maintaining smooth movement throughout the suspension's travel.

Note: This is a DIY fabrication kit. Components are supplied individually and require welding and final assembly by the builder.

Includes:

  • (1) 2.5" O.D. x 48" x .250" Wall DOM Steel Tube
  • (1) Precision-Machined 7075 Aluminum Internal Insert
  • (1) 1.25" Shank Rod End for 1" Bolt
  • (1) Chromoly Bearing (2.75" O.D. x 1.50" I.D.)
  • Custom High-Misalignment Spacers for 1" Bolt
Specifications
Specification Details
Manufacturer Wide Open Design
Product Type DIY Tube Trailing Arm Kit
Tube Material DOM Steel
Tube Diameter 2.5"
Wall Thickness .250"
Tube Length 48"
Internal Insert Material 7075 Aluminum
Insert Diameter 2.0"
Front Joint 1.25" Shank Rod End for 1" Bolt
Rear Joint Chromoly Bearing, 2.75" O.D. x 1.50" I.D.
Suspension Type Coilover and Bypass Compatible
Assembly DIY Builder-Welded Kit
Country of Origin Made in the USA
Fitment

Compatible Applications:

  • Universal custom trailing arm suspension builds
  • Rock crawlers and rock bouncers
  • Ultra4 race vehicles
  • Long-travel buggies
  • Trail rigs
  • Custom tube chassis vehicles

Installation Notes:

  • Designed for experienced fabricators.
  • Requires welding and final assembly.
  • Shock mounts, axle brackets, frame brackets, and additional suspension components are not included.
  • Verify trailing arm length, suspension geometry, wheelbase, and mounting locations before welding.
  • Cycle the suspension through full compression and droop to confirm proper clearance and articulation.
FAQ

Why use a long trailing arm?

Longer trailing arms reduce pinion angle change throughout suspension travel while helping improve ride quality, traction, and stability over rough terrain. The 48-inch length makes this kit well suited for long-travel rear suspension systems used in aggressive off-road applications.

Why use a 7075 aluminum insert?

The precision-machined 7075 aluminum insert reinforces the tube end while reducing weight compared to a comparable steel insert. This provides excellent thread support and stiffness without adding unnecessary unsprung weight.

Why combine a rod end with a chromoly bearing?

The front rod end provides easy suspension adjustment and alignment, while the large rear chromoly bearing offers exceptional strength and unrestricted articulation at the axle. Combined with the included high-misalignment spacers, the system allows the suspension to cycle smoothly through extreme travel without binding.

Why use .250-wall DOM tubing?

Heavy-wall DOM tubing offers excellent resistance to bending, torsional loads, and impact damage. It has become the standard material for high-performance suspension links and trailing arms because it provides outstanding strength and durability in severe off-road environments.

Builder Tip

Before final welding, mock up the complete suspension with the intended shocks, axle, wheels, and tires installed. Cycling the suspension through its full range of motion helps verify pinion angle, shock travel, link clearance, and tire clearance before the trailing arms are permanently assembled.

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