Tri-Axle Suspension Rebuild Kit
Tri-Axle Trailer Suspension Hanger Rebuild Kit with 3" Wet Bolts and EQ-310 Equalizers , 3.125" Straps
Complete wear-part suspension service kit for standard triple-axle trailers using 1-3/4" wide double-eye leaf springs. Includes greaseable wet bolts, bronze bushings, shackle straps, EQ-310 tall equalizers.
Part Number: SHK-3A-WB-TE-3.125-BB Triple Axle Double-Eye Springs Updated 8-Hanger Kit
Overview
This R&P Carriages tri-axle suspension rebuild kit is built to replace the common wear components on a standard triple-axle trailer suspension. It is intended for double-eye spring setups using standard 1-3/4" wide trailer leaf springs and includes the EQ-310 tall equalizers, wet bolts, bronze bushings, shackle straps, flange nuts, and hangers needed for a major suspension refresh.
R&P Service Insight
Suspension wear usually shows up first at the pivot points: bolts, bushings, shackles, equalizers, and hangers. Rebuilding the system as a matched kit helps avoid installing new parts around worn hardware.
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Wet Bolt Upgrade: Greasable wet bolts allow periodic lubrication at the suspension pivot points.
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Triple-Axle Coverage: The kit is configured for standard tri-axle double-eye spring layouts.
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Updated BOM: This version includes 4 front/rear hangers and 4 center hangers, for 8 total hangers.
R&P Knowledge Hub
Compatibility: Designed for standard triple-axle trailer suspension layouts using double-eye leaf springs and compatible hanger/equalizer geometry.
Trailer System Fit: Intended for 1-3/4" wide leaf spring suspension systems. Not for slipper spring suspension systems.
Installation Notes: Verify existing hanger heights, equalizer dimensions, shackle length, bolt diameter, spring style, and spring width before ordering.
Performance Insight: Bronze bushings and greasable wet bolts help improve serviceability and reduce dry pivot-point wear when maintained properly.
Brand & Fitment Note
Selling Brand: R&P Carriages curated trailer suspension service kit.
Application Reference: This listing describes a suspension rebuild kit for compatible standard tri-axle double-eye spring trailer applications where the measurements and configuration match.
What This Means: This is a curated service kit assembled around the listed components and part numbers, not a guaranteed OEM-branded assembly unless specifically stated and verified.
Before Ordering: Verify your trailer’s suspension layout, spring style, hanger placement, equalizer size, shackle length, and bolt size before installation.
R&P Repair Insight
Do not choose a suspension rebuild kit by axle count alone. The equalizer height, hanger height, shackle length, spring style, and bolt diameter all matter. Older listings may also show outdated hanger counts, so the included components should always be checked against the current BOM.
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Check Spring Style: This kit is for double-eye leaf springs, not slipper springs.
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Check Hanger Layout: This updated kit includes 8 hangers total: 4 H-3.090 and 4 H-3.875.
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Check Equalizer Size: Confirm that the EQ-310 tall equalizer dimensions match your existing suspension geometry.
Features
Complete Tri-Axle Wear-Part Kit
Includes the major wear components commonly replaced during a triple-axle double-eye suspension rebuild.
Greasable Wet Bolts
Includes 24 FA-7-187 wet bolts for serviceable suspension pivot points when maintained with grease.
EQ-310 Tall Equalizers
Includes 4 EQ-310 equalizers measuring approximately 6.13" wide by 4" tall with 0.56" holes.
Updated 8-Hanger BOM
Includes 4 H-3.090 front/rear hangers and 4 H-3.875 center hangers for the corrected hanger count.
Specifications
| Specification |
Detail |
| Part Number |
SHK-3A-WB-TE-3.125-BB |
| Brand |
R&P Carriages |
| Product Type |
Tri-axle trailer suspension rebuild kit |
| Application |
Standard triple-axle trailer suspension service |
| Spring Style |
Double-eye leaf springs |
| Spring Width |
Standard 1-3/4" wide trailer leaf springs |
| Equalizer |
EQ-310 tall equalizer, approximately 6.13" x 4", 0.56" holes |
| Wet Bolt |
9/16" x 3" hardened shouldered greasable wet bolt |
| Shackle Strap |
SL-3.125, 3.125" hole center |
Fitment / Application
| Category |
Details |
| Trailer Type |
Standard triple-axle trailers using compatible double-eye spring suspension geometry |
| Primary Fit |
Double-eye spring suspension with 1-3/4" wide springs |
| Not For |
Slipper spring suspension systems |
| Verification |
Confirm hanger height, equalizer size, shackle length, bolt diameter, and spring width before ordering. |
Included Components
| Quantity |
Part Number |
Item |
| 24 |
BU1-1566B |
Bronze spring eye / equalizer bushings, 0.57" x 0.69" |
| 4 |
EQ-310 |
Equalizer, 6.13" x 4", 0.56" holes, tall equalizer style |
| 24 |
FA-6-92Z |
7/16" flange nuts for shackle bolts / wet bolts |
| 24 |
FA-7-187 |
Wet bolt, hex head, 0.56" x 3", 7/16" step-down end |
| 4 |
H-3.090 |
Front / rear hanger, 2.46" bolt height, 3.085" overall, 0.56" round holes |
| 4 |
H-3.875 |
Center hanger, 3.25" bolt height, 3.875" overall, 0.56" round holes |
| 16 |
SL-3.125 |
Shackle strap, 3.125" hole center, 4.312" x 1.25" x 0.23" |
Updated B.O.M. Note
Corrected hanger count: This kit now includes 4 H-3.090 front/rear hangers and 4 H-3.875 center hangers.
Total hangers included: 8 hangers.
Important: Older listing language may show only 2 front/rear hangers. The current BOM reflects 4 H-3.090 hangers.
Verify all suspension measurements before installation, including spring style, spring width, hanger height, equalizer size, shackle strap length, bolt diameter, and total hanger layout. This kit is intended for compatible double-eye spring tri-axle suspension systems and is not for slipper spring applications.
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