SPARKWHIZ Trailer Shackle Kit for Tandem Axle Trailers — Double‑Eye Springs, 7-3/4" Equalizers & Nylon Bushings

SPARKWHIZ Trailer Shackle Kit for tandem axle trailers with double-eye leaf springs replaces worn shackles and equalizers to restore suspension stability and reduce noise while supporting up to 6,000 lb per axle.

If your tandem-axle trailer uses double-eye leaf springs and you’re experiencing squeaks, uneven ride, or loose suspension hardware, this comprehensive shackle kit supplies the components needed to refresh the rear suspension. The kit includes triangle equalizers, heavy-duty shackle straps, nylon bushings, and the correct bolts and locking nuts to complete a reliable replacement without fabricating parts.

How will this kit improve towing stability and reduce noise?

Replacing worn shackles and bushings restores proper alignment between leaf springs and the axle, which reduces lateral play and metal-on-metal contact. The included nylon bushings isolate the moving steel parts to damp vibrations and cut squeaks commonly caused by dry or corroded hardware.

• Two 7-3/4" triangle equalizers re-center spring movement for even load transfer
• Eight 9/16" nylon bushings reduce friction and dampen vibration
• Heavy-gauge steel straps and anti-corrosion finish keep components tight under load

What components are included and why do they matter?

This kit is packaged to replace both sides of a tandem axle assembly with double-eye springs, so you get matching parts for balanced performance. Every fastener you need is supplied to prevent mismatched hardware or ordering delays during installation.

• 2 triangle equalizers sized 7-3/4" for correct spring travel
• 8 nylon bushings (9/16") to protect pin holes and reduce wear
• 8 shackle straps (2 9/16") and 14 bolts with locking nuts for secure assembly

Is this kit compatible with my trailer and how do I confirm fit?

The SPARKWHIZ kit is designed for trailers that use double-eye leaf springs on tandem axles and for systems rated up to 6,000 lb per axle (12,000 lb combined GVWR). Before buying, measure your spring eye inner and outer diameters, check shackle length, and verify your axle weight rating to ensure correct fitment.

• Intended for double-eye leaf springs on tandem axles — not for slipper or single-eye springs
• Supports up to 6,000 lb per axle; confirm axle’s load rating matches your trailer
• Compare supplied equalizer and shackle strap dimensions with your current hardware

How durable is the hardware for outdoor and heavy-use conditions?

All steel parts are finished with an anti-corrosion coating to resist rust from road salt, rain, and trailer storage conditions. The robust construction and proper bushing isolation extend component life and maintain consistent suspension behavior even under frequent towing and rough terrain.

• High-quality steel fabrication for strength under heavy loads
• Corrosion-resistant coating for longer outdoor service life
• Nylon bushings reduce wear on metal pins and eyelets, extending spring life

Who is this for: This complete shackle kit is intended for owners of tandem-axle trailers equipped with double-eye leaf springs who need a dependable, full replacement set. If you tow boats, utility trailers, campers or commercial payloads and want to eliminate squeaks, restore correct ride geometry, and avoid piecemeal orders, this kit delivers matched components and hardware for a straightforward installation. Always verify your trailer’s spring style and axle ratings before ordering to ensure compatibility.