Compatible Axles: 12,000 lb Trailer Axles Electric or Hydraulic Disc

Tandem Axle 12K Trailer Suspension Kit – Heavy Duty 5-Leaf Slipper Springs (24,000 lb Capacity)

Upgrade or replace your trailer suspension with this heavy-duty tandem axle suspension kit, engineered for 12,000 lb axles (24,000 lb total capacity). Designed for strength, durability, and compatibility with major axle brands, this complete kit includes everything needed to mount 5" round trailer axles using 3" wide slipper springs.

This tandem axle trailer suspension kit is designed for use with axles spaced 42" apart (center-to-center), which is a common standard for 12,000 lb trailer axles.

What’s Included:

Leaf Springs:

• (4) Heavy Duty Slipper Springs
• Number of Leaves: 5
• Spring Width: 3"
• Spring Length: 30.5" (center of eye to end of hook)
• Eye Diameter: 1"
• Bushing Type: Rubber
• Capacity: 6,000 lbs per spring
• Axle Rating: 12,000 lbs per axle
  

U-Bolt Kit:

• (8) U-Bolts
• (4) U-Bolt Tie Plates (for 3" springs)
• (16) Hex Nuts
• (16) Lock Washers

Hangers & Equalizers:

• (2) 6.250" Tall Front Hangers
• (2) 4.120" Tall Center Hangers
• (2) 6.630" Tall Rear Hangers
• (2) 18.42" Straight Equalizers

Suspension Hardware:

• (4) 1/2" x 4-1/2" Spring Keeper Bolts
• (4) 1/2" Flange Lock Nuts
• (2) 1-1/8" Equalizer Bolts
• (2) 1-1/8" Hex Lock Nuts

Key Features & Compatibility

• Complete tandem axle suspension kit for trailers
• Supports 12K axles (24K total GVWR)
• Designed for 5" round axles
• Compatible with major axle manufacturers: Dexter, AL-KO, Hayes, Rockwell American, TK, and Texas Pride
• Ideal for equipment trailers, flatbeds, dump trailers, and heavy-duty haulers
• Spring seats required for mounting axle to leaf springs (sold separately)

Application

This suspension kit is intended for tandem axle trailer setups using 12,000 lb axles. It provides reliable load distribution, smoother towing, and long-term durability for commercial and heavy-use trailers.

Note on Raw Materials:
When ordering raw steel suspension components, minor surface rust and protective oils are normal and may require cleaning prior to installation. This does not affect performance or structural integrity.