The best tandem axle trailer bushings depend on whether you need replacement bushings alone or a complete suspension kit. The Dunzy brass and TYHI nylon sets are bushing-only options; OZISENS and SPARKWHIZ kits include related suspension hardware. Check bushing dimensions, shackle length, and axle rating against your existing setup before ordering.
| Product | Best For | Key Detail |
|---|---|---|
| Dunzy Brass Bushing Kit | Brass bushings in a multi-piece set | 16 bushings; 9/16-inch ID |
| TYHI Nylon Bushing Kit | Nylon replacements | 16 bushings; listed as 722106 |
| OZISENS 256L Equalizer Kit | Complete kit with 2-9/16-inch shackle spacing | Includes nylon bushings and hardware |
| OZISENS 312L Equalizer Kit | Complete kit with 3-1/8-inch shackle spacing | Includes nylon bushings and hardware |
| SPARKWHIZ Shackle Kit | Double-eye springs with a stated 6,000-pound axle rating | Includes equalizers, straps, and bushings |
Dunzy Brass Trailer Spring Bushing Kit
This 16-piece set is best for trailer owners seeking brass replacement bushings rather than a full shackle or equalizer assembly. Each bushing measures 9/16 inch inside diameter, 11/16 inch outside diameter, and 1-3/4 inches long. The listed brass construction is described as wear- and temperature-resistant and not easily oxidized, deformed, or corroded.
It was selected for its clearly stated material and dimensions, which make comparison with existing bushings straightforward. Confirm the size and intended application before purchase: the listing advises checking equipment compatibility, and the kit does not include the full suspension hardware found in complete kits.
TYHI 16-Piece Nylon Bushing Kit
The TYHI kit is best for buyers who want nylon bushings for double-eye leaf springs or axle equalizers. It contains 16 bushings with a 9/16-inch inner diameter, 11/16-inch outer diameter, and 1-3/4-inch length. The product is identified as a replacement for part number 722106 and describes the nylon as wear-resistant, with the stated aim of reducing squeaking and vibration.
This option was chosen because it gives a part-number reference as well as complete dimensions. Verify that 722106 and the measurements match your trailer before ordering. This is a bushing set, not a complete kit of bolts, straps, or equalizers.
OZISENS 256L Equalizer Shackle Kit
Choose this OZISENS kit if you need bushings along with equalizers, shackle straps, bolts, and locking nuts for a double-eye spring tandem suspension. It is listed for 3,500- to 5,200-pound axles. The package includes 14 nylon bushings, each with a 9/16-inch inner diameter and 11/16-inch outer diameter, plus two 7-3/4-inch equalizers.
The key fit measurement is the shackle strap hole spacing: 2-9/16 inches. The listing also specifies 4.4-inch straps and 3-3/8-inch bolts. This kit is best for a broader hardware replacement; avoid choosing it based only on axle rating if your existing shackle dimensions differ.
OZISENS 312L Equalizer Shackle Kit
This kit is better for a trailer whose existing shackle straps have 3-1/8-inch hole spacing. It is listed for double-eye spring tandem suspension and 3,500- to 5,200-pound axles. The set includes two 7-3/4-inch equalizers, eight 4.4-inch shackle straps, 14 nylon bushings, bolts, and self-locking nuts.
The bushing dimensions are 9/16-inch inside diameter and 11/16-inch outside diameter. Its stated corrosion protection includes black oxidation and a painted surface. The important limitation is fit: the strap spacing differs from the 256L version, so compare your current parts rather than selecting by model name alone.
SPARKWHIZ Tandem Axle Shackle Kit
The SPARKWHIZ kit is best for buyers replacing several tandem suspension components at once and seeking a kit listed for up to 6,000 pounds per axle. It includes two 7-3/4-inch triangle equalizers, eight nylon bushings, eight 2-9/16-inch shackle straps, and bolts and locking nuts. The listing describes steel construction and an anti-corrosion coating for outdoor use.
Check the supplied measurements against your current assembly. The product description states a 9/16-inch bolt size and 3-inch bolt length, and specifies 12,000 pounds total GVWR; those ratings and dimensions should not be assumed to match every trailer. Confirm the trailer manufacturer’s specifications before replacing suspension parts.
Buying Guide: How To Choose Tandem Axle Trailer Bushings
Should you buy bushings alone or a complete kit?
Choose a bushing-only set when the straps, bolts, and equalizers are in suitable condition and you need matching replacement inserts. A complete shackle kit is more appropriate when several connected parts also need replacement. Compare the package contents carefully; a 16-piece bushing set does not supply all the hardware in an equalizer kit.
Which dimensions should you verify?
Measure or identify the bushing’s inner diameter, outer diameter, and length. Also compare shackle strap hole spacing, strap length, bolt diameter, and bolt length when buying a complete kit. The products here include 9/16-inch ID and 11/16-inch OD bushings, but those shared measurements do not establish that every kit fits your suspension.
Is brass or nylon the better choice?
Material choice depends on the replacement part specified for your trailer and your intended repair. The listed Dunzy bushings are brass; the TYHI and complete OZISENS kits specify nylon bushings. Do not assume the materials are interchangeable based only on matching dimensions. Check the existing component or trailer documentation.
How should axle capacity factor into the choice?
Use the product’s stated axle range as one check, not as a substitute for measuring parts. The OZISENS kits are listed for 3,500- to 5,200-pound axles, while SPARKWHIZ states up to 6,000 pounds per axle. Confirm the required capacity and suspension configuration for your trailer before installation.
Frequently Asked Questions
What do tandem axle trailer bushings do?
Bushings fit at suspension connection points, including leaf spring and shackle locations. Their size and material must match the hardware they replace.
Are 9/16-inch inner-diameter bushings universal?
No. A matching inner diameter alone does not confirm fit. Check outer diameter, length, suspension type, and the related bolt and bracket dimensions.
Can I replace bushings without replacing the shackles?
That depends on the condition and fit of the existing hardware. Bushing-only kits supply inserts, while complete kits include additional suspension components.
How do I choose between the OZISENS 256L and 312L kits?
Compare the shackle strap hole spacing: the 256L kit lists 2-9/16 inches, while the 312L kit lists 3-1/8 inches. Match the measurement to your existing setup.