12K Complete Gooseneck Tandem Trailer Kit — 24K capacity | Axles, Suspension, Wheels, Coupler, Jacks & Wiring

Everything you need to build a 24,000 lb gooseneck trailer, in one package: two 12,000 lb hydraulic disc brake axles, matched slipper suspension, dual wheels, a gooseneck coupler with dual drop-leg jacks, and the complete lighting, wiring, breakaway, and DOT-tape package.

Kit Specifications:

• Load rating: 24,000 lbs combined (two 12K axles)
• Axle type: Hydraulic Disc Brake
• Brake size: Hydraulic disc
• Tube diameter: 5″ straight steel axle tube
• Hubface/Spring Center: 74/46
• Bolt pattern: 8x6.5
• Stud size: 5/8″
• ABS: Not compatible with ABS systems

How to Measure: Hubface is measured from one hub face (where the studs come out) to the hub face on the opposite side. Spring Center is measured from the center of one spring seat to the center of the opposite spring seat.

What’s Included:

• (2) 12K Straight Trailer Axles — 12,000 lb Hydraulic Disc Brake, 8 Lug
• (4) 5-Leaf HD Slipper Springs for 12,000 lb Axles
• (2) U-Bolt Kits for 12,000–15,000 lb Axles
• (1) Slipper Tandem Suspension / Hanger Kit for 10K–15K Axles
• (1) Slipper Single Axle Suspension / Hanger Kit for 10K–15K Axles
• (8) 16″ 10-Ply Radial TWA — ST235/80R16, 8 Lug Dual — Silver/Gray Finish
• (1) 25K Gooseneck Coupler — 25,000 lb Adjustable Round, 2 5/16″
• (2) Drop-Leg 12K Trailer Jacks — 12,000 lb Front Pin, Side Wind
• (2) RAM 12K Trailer Jack Handles
• (4) Red 6″ Oval LED S/T/T Lights
• (2) Amber 6″ Oval LED S/T/T Midship Lights
• (4) 3/4″ Amber Side Marker Lights
• (2) 3/4″ Red Side Marker Lights
• (1) Sealed ID Light Bar — 3 Red Lights
• (6) Flush-Mount Grommets for 6″ Oval Lights
• (6) 3-Prong Pigtails for LED Lights — 10″
• (1) License Plate Light — Rectangular
• (1) 7-Way Plug with 46 ft 6-Way 14-Gauge Cable
• (1) 12-Volt Trailer Breakaway Kit
• (1) Breakaway Switch
• (50) Reflective DOT Tape — 18″ Strips
• (2) Safety Chains — 3/8 x 39″ w/ 1 Clevis Hook, G70 (27.4K capacity)

Key Benefits:

• Complete, ready-to-build package — axles through wiring in one order
• Matched fitment — every component sized to work together
• 24,000 lb combined capacity — heavy-duty dual-wheel running gear

Ideal For:

• Gooseneck & lowboy trailers
• Equipment & dump haulers
• Flatbed & deckover builds
• Commercial & fleet builds

Why Buy from The Trailer Parts Outlet?

• This kit is proudly assembled in the U.S.A.
• Fast shipping — order today, ships tomorrow
• Bulk & wholesale options available
• Financing options
• Dedicated expert support

Have questions? Call or message us at (936) 289-3191 — we’re here to help you find the perfect kit for your trailer build. Order your 12K Complete Gooseneck Trailer Kit today and get building with confidence!