Tandem Trailer Axles
Build or upgrade your trailer with tandem trailer axles and tandem axle kits from The Trailer Parts Outlet. We carry heavy duty kits from 3,500 lb per axle through 8,000 lb per axle for utility trailers, equipment haulers, cargo trailers, and boat trailers.
A tandem setup spreads weight across two axles, cuts sway, and rides smoother than a single axle trailer. Use this page to compare complete tandem kits or shop individual tandem axles for a replacement or new build.
Browse all trailer axles or shop trailer axle kits by capacity.
Tandem Axle Kits by Capacity
• 3,500 lb tandem axle kits (7,000 lb total capacity)
• 5,200 lb tandem axle kits (10,400 lb total capacity)
• 7,000 lb tandem axle kits (14,000 lb total capacity)
• 8,000 lb tandem axle kits (16,000 lb total capacity)
Most kits include axles, leaf springs, hangers, U bolts, and hardware. Choose light duty (LD), heavy duty (HD), or TK axle series based on your frame, load, and road use.
Brake or Idler Tandem Axles
Braked tandem axles are the right call for heavier loads and highway towing. Idler tandem axles work on lighter trailers where local rules allow. Match both axles to the same capacity, bolt pattern, hub face, and spring center before you order.
How to Pick the Right Tandem Axle Kit
Tell us your trailer length, target load, and whether you need brakes. We will point you to the right capacity and kit series. If you are replacing axles, measure hub face to hub face and spring center to spring center first. Ordering by capacity alone is not enough.
Frequently Asked Questions
- What is a tandem trailer axle?
A tandem trailer axle setup uses two axles on the same trailer. Each axle shares the load, which raises capacity and improves stability.
- What capacity tandem axle kit do I need?
Match total kit capacity to your trailer GVWR and real world load. A 3,500 lb per axle tandem kit gives you 7,000 lb total. An 8,000 lb per axle tandem kit gives you 16,000 lb total.
- Should I buy a tandem axle kit or individual axles?
Buy a kit if you are building fresh suspension or replacing the full axle and spring setup. Buy individual axles if you only need to swap one beam and your springs and hangers are still good.
