Tandem Axle Trailer Suspension Rebuild Kit
R&P Carriages Tandem Axle Wet Bolt Suspension Rebuild Kit with EQ-E1 Equalizers, Brass Bushings & 2.1" Shackle Straps
A complete wear-parts rebuild kit for standard tandem axle trailer suspensions using eye-to-eye leaf springs. Includes greasable wet bolts, brass bushings, EQ-E1 equalizers, flange nuts, and short 2.1" shackle straps.
Part Number: SRK-TA-WB-LE-BB-2 2.1" Shackle Strap Kit For 1-3/4" Wide Eye-to-Eye Springs
Overview
This R&P Carriages tandem axle suspension rebuild kit is built to replace the common wear parts on standard tandem axle trailer suspensions. It is designed for trailers using standard eye-to-eye leaf springs, not slipper springs, and is intended for applications where the spring width, equalizer dimensions, bolt sizing, and shackle length match the listed specifications. The greasable wet bolts allow grease to be serviced into the bushing area, helping address one of the most common trailer suspension problems: dry, worn pivot points.
R&P Service Insight
We work on trailers regularly, and worn suspension hardware is one of the most common problems found during service. Dry bolts, worn bushings, and stretched shackle straps can create noise, looseness, tire wear, and poor suspension tracking.
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Greaseable Wear Points: Wet bolts allow routine grease service at the spring and equalizer pivot points.
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Short Shackle Version: This kit includes 2.1" shackle straps. It is not the longer 2.6" shackle setup.
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Complete Matched Kit: Includes the bolts, nuts, bushings, equalizers, and shackles needed for a tandem axle suspension wear-parts rebuild.
R&P Knowledge Hub
Compatibility: Designed for standard tandem axle trailer suspensions using eye-to-eye leaf springs, 1-3/4" wide springs, 9/16" suspension bolts, matching EQ-E1 equalizer dimensions, and 2.1" shackle straps.
Vehicle / System Fit: Used on many tandem axle utility, equipment, enclosed, and cargo trailer suspension rebuilds in the listed 4,000 lb GVW to 14,000 lb GVW range where all measurements match.
Installation Notes: This kit is not for slipper spring suspensions. Measure your existing shackle straps from hole center to hole center before ordering and confirm the equalizer spacing before installation.
Performance Insight: Brass bushings and greasable wet bolts are a strong service upgrade over dry suspension hardware because they allow the pivot area to be maintained instead of running without grease.
Brand & Fitment Note
Selling Brand: R&P Carriages
Application Reference: Trailer suspension terms in this listing describe compatibility, fitment target, and application style only where the listed measurements and configuration match.
What This Means: This listing is for an R&P Carriages curated tandem axle suspension rebuild kit, not a guaranteed OEM-branded kit unless specifically stated and verified.
Before Ordering: Verify spring style, spring width, bolt diameter, equalizer dimensions, shackle strap length, hanger condition, and included components before installation.
R&P Repair Insight
Before rebuilding the suspension, inspect the spring eyes, equalizer holes, shackle straps, and hanger holes. New hardware will not correct badly worn or elongated mounting points, so measurements and condition checks matter before parts are installed.
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Shackle Length Check: This is the 2.1" shackle strap version. Measure hole center to hole center and do not order this kit if your trailer requires the longer 2.6" shackles.
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Equalizer Check: EQ-E1 equalizers measure 7.75" from side hole center to side hole center and 4.75" from the top hole center to either side hole center.
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Spring Style Check: This kit is for standard eye-to-eye leaf springs. It is not for slipper springs, which use a different suspension layout.
Features
Greasable Wet Bolt Upgrade
Includes 14 hardened 9/16" x 3" wet bolts with a 7/16" step-down shoulder so grease can be serviced into the bushing area.
Brass Bushing Rebuild
Includes 14 brass suspension bushings sized 9/16" x 11/16" to replace common worn spring eye and equalizer bushings.
EQ-E1 Equalizers Included
Includes two EQ-E1 long spring pivot equalizers with 7.75" side-hole center spacing and 4.75" top-to-side hole spacing.
Correct 2.1" Shackle Kit
Includes eight short 2.1" shackle straps. This is the SRK-TA-WB-LE-BB-2 short-shackle version.
Specifications
| Specification | Detail |
| Part Number | SRK-TA-WB-LE-BB-2 |
| Brand | R&P Carriages |
| Product Type | Tandem axle suspension rebuild kit |
| Application | Standard tandem axle trailer leaf spring suspension |
| Spring Style | Eye-to-eye leaf springs only |
| Spring Width | 1-3/4" wide springs |
| Shackle Strap Length | 2.1" hole-center to hole-center |
| Equalizer Size | 7.75" side-hole center to side-hole center; 4.75" top hole center to either side hole center |
| Wet Bolt Size | 9/16" x 3" with 7/16" step-down shoulder |
| Bushing Size | 9/16" x 11/16" brass bushings |
| Listed GVW Range | 4,000 lb GVW up to 14,000 lb GVW where suspension dimensions match |
Fitment / Application
| Category | Details |
| Vehicle / System | Tandem axle trailer suspension |
| Primary Fit | Standard tandem axle trailers using eye-to-eye leaf springs and 1-3/4" wide springs |
| Required Match | 2.1" shackle straps, EQ-E1 equalizer dimensions, and 9/16" suspension bolt setup |
| Not For | Slipper spring suspensions or trailers requiring longer 2.6" shackle straps |
| Notes | Measure your current suspension before ordering. Confirm shackle strap length, equalizer spacing, spring width, bolt diameter, and hanger condition. |
Included Components
| Quantity | Item |
| 14 | 9/16" x 3" hardened greasable wet bolts with 7/16" step-down shoulder |
| 14 | 7/16" flange nuts |
| 2 | EQ-E1 long spring pivot equalizers, 7.75" side-hole center to side-hole center |
| 14 | 9/16" x 11/16" brass suspension bushings |
| 8 | 2.1" short spring shackle straps |
Important fitment check: this listing is for kit SRK-TA-WB-LE-BB-2 and includes 2.1" shackle straps. Measure shackle straps from hole center to hole center before ordering. Also verify equalizer dimensions, spring width, bolt diameter, suspension style, hanger condition, and included components before installation. This kit is for standard eye-to-eye spring suspensions and is not intended for slipper spring setups.
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