10K Complete Gooseneck Tandem Trailer Kit — 20K capacity | Axles, Suspension, Wheels, Coupler, Jacks & Wiring

Everything you need to build a 20,000 lb gooseneck trailer, in one package: two 10,000 lb electric 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: 20,000 lbs combined (two 10K axles)
• Axle type: Electric Brake
• Brake size:12¼″ × 3⅜″ electric drum
• 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) 10k TK Electric Brake Trailer Axle - (Grease Bath) - 74/46 - 8x6.5
• (4) 5 Leaf 30 1/2" x 2.5" Wide Trailer Heavy Duty Slipper Spring for 10000 lb Axles
• (2) 5/8" Trailer U-bolt kit for 5" Tube 10000 lb Axles
• (1) Slipper Tandem Suspension / Hanger Kit for 10000 lb axles
• (1) Slipper Single Axle Suspension/Hanger Kit for 10000lb axles
• (8) 16" 10 ply Radial Trailer Tire & Wheel - ST 235/80 R16 (Dual) - 8x6.5
• (1) RAM 25k Gooseneck Trailer Coupler - 25000 lb Adjustable Round 2 5/16
• (2) 12K Drop Leg Trailer Jack - 12000 lb Front Pin Side Wind with Handle (12.5" Travel) - Boxed
• (4) Red 6in Oval LED S/T/T Light 6" Oval 6 LED STT Grommet Mount Red Lens Pigtail
• (2) Midturn Amber Lens Grommet Mount Pigtail
• (4) 3/4" Round Amber Mini Side Marker Clearance Light Amber Mini Grommet Mount PC Sidemarker Amber Lens
• (2) 3/4" Round Red Mini Side Marker Clearance Light
• (6) Flush Mount Grommet For 6in Oval Lights
• (1) Heavy Duty Sealed ID Light Bar - 3 Red Lights
• (1) License Plate Light - DOT Rated (Chrome Base License Lamp Vertical Plane Mount)
• (1) 7 Way Plug
• (46 ft) 6 Way Cable 14 Gauge
• (1) 12 Volt Trailer Breakaway Kit
• (2) Gold Trailer Safety Chain - 3/8 x 39" with 1 Clevis Hook (27.4k Capacity)
• (50) Reflective DOT Tape - 18" Strips

Key Benefits:

• Complete, ready-to-build package — axles through wiring in one order
• Matched fitment — every component sized to work together
• 20,000 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 10K Complete Gooseneck Trailer Kit today and get building with confidence!