Complete Suspension Rebuild kit For 7K Tandem Trailer Axles 25" Springs Wet Bolts
Complete R&P Carriages custom suspension rebuild kit for 3.5K tandem trailer axle suspension setups, including leaf springs, hangers, equalizers, shackle straps, wet bolts, bronze bushings, U-bolts, nuts, and tie plates.
Overview
This complete suspension rebuild package is assembled by R&P Carriages for tandem trailer axle suspension service. The kit is built around SW5 double-eye leaf springs, curved equalizers, hanger brackets, shackle straps, greaseable wet bolts, flange nuts, bronze bushings, round U-bolts, and tie plates. It is a strong choice when refreshing worn suspension pivot points, tired leaf springs, damaged shackles, or old equalizer hardware.
R&P Service Insight
Suspension rebuilds are best handled as a complete system when multiple wear points are already apart.
- Complete Refresh: Replaces springs, shackles, equalizers, bushings, bolts, hangers, U-bolts, and tie plates.
- Greaseable Hardware: Wet bolts and bronze bushings help improve serviceability at the suspension pivot points.
- Fitment Check: Always confirm spring length, hanger layout, equalizer dimensions, axle tube size, and bolt hole measurements before ordering.
R&P Knowledge Hub
Compatibility: Built for tandem trailer axle suspension rebuilds when the existing layout matches the listed spring, hanger, shackle, equalizer, U-bolt, and tie plate dimensions.
Vehicle / System Fit: Trailer tandem axle suspension systems using double-eye leaf springs and equalizer-style suspension.
Installation Notes: Hangers may require welding. Suspension geometry should be measured before removal so the axle spacing, hanger position, and equalizer location are maintained.
Performance Insight: New wet bolts and bronze bushings help reduce sloppy suspension movement caused by worn pivot hardware.
Brand & Fitment Note
Selling Brand: R&P Carriages Custom Kit
Application Reference: 3.5K tandem trailer axle suspension rebuild kit.
What This Means: This is an R&P-assembled package using the listed replacement suspension components for a full tandem axle suspension service.
Before Ordering: The supplied U-bolts are listed as 3" x 7" round U-bolts with matching tie plates. Confirm your axle tube diameter and existing suspension measurements before ordering.
R&P Repair Insight
A worn tandem suspension can create uneven tire wear, rough towing, loose tracking, clunking, or visible movement in the shackles and equalizers. Replacing the suspension as a system helps restore the connection points between the trailer frame, leaf springs, equalizers, and axles.
- Measure First: Confirm spring eye-to-eye length, spring width, equalizer spacing, shackle length, and hanger height.
- Inspect the Frame: Check hanger welds, frame condition, and axle alignment before installation.
- Torque & Grease: Follow proper torque procedures and grease all serviceable pivot points after assembly.
Features
Complete Tandem Suspension Package
Includes the listed leaf springs, hangers, equalizers, shackles, bolts, nuts, bushings, U-bolts, and tie plates for a full suspension rebuild.
SW5 Double-Eye Leaf Springs
Includes four 25.25" long, 1.75" wide, 5-leaf SW5 springs for the listed 3.5K tandem axle application.
Wet Bolt Upgrade Hardware
Greaseable wet bolts and bronze bushings help provide better long-term serviceability than standard dry pivot hardware.
R&P Custom-Assembled Kit
Packaged by R&P Carriages to simplify ordering for a complete tandem axle suspension rebuild.
Specifications
| Specification | Detail |
|---|---|
| Part Number | CSRK-TA-WB-LE-BB-SW5 |
| Listing SKU | CSRK-TA-WB-LE-BB-SW5 |
| Brand | R&P Carriages Custom Kit |
| Product Type | Complete Tandem Axle Suspension Rebuild Kit |
| Quantity Included | 90 listed components |
| Application | 3.5K tandem trailer axle suspension rebuild |
| Material / Finish | Mixed suspension hardware; bronze bushings included. Finish may vary by component. |
| Key Measurement | 25.25" double-eye springs, 7.75" equalizers, 2.562" shackle straps, 3" round U-bolts. |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Tandem trailer leaf spring suspension |
| Primary Fit | 3.5K tandem axle suspension setups with matching dimensions. |
| Secondary Fit / Common Uses | Utility trailers, equipment trailers, landscape trailers, and other tandem axle trailers using compatible double-eye suspension geometry. |
| Notes | Verify spring length, spring width, equalizer spacing, shackle length, hanger height, bolt diameter, and axle tube size before ordering. |
Detailed Measurements
| Component | Measurement / Detail |
|---|---|
| SW5 Leaf Spring | Double eye, 25.25" long, 5-leaf, 1.75" wide, 3,500 lb application reference. |
| H-3.875 Hanger | 3.25" bolt height, 3.875" overall height, 0.56" round holes. |
| EQ-E1 Curved Equalizer | 7.75" bottom hole to bottom hole center-to-center; 2.88" top hole to bottom hole center-to-center. |
| SL-2.562 Shackle Strap | 2.562" hole center; 3.75" x 1.25" x .23" strap size. |
| FA-7-187 Equalizer / Shackle Bolt | Hex head, 0.56" x 3", wet bolt, greaseable, step-down end 0.44". |
| FA-6-92Z Flange Nut | 7/16" flange nut for greaseable shackle bolts. |
| BU1-1566B Bronze Bushing | 0.57" x 0.69" x 1.75" bronze spring eye / equalizer bushing. |
| UB-R302 U-Bolt | Round U-bolt, 3" x 7" x 1/2"-20; listed fit reference 6000 lb / 7000 lb. |
| 12N U-Bolt Nut | 1/2"-20 U-bolt nut. |
| TP-4 U-Bolt Tie Plate | 3" center-to-center U-bolt holes; listed fit reference 5200 lb / 6000 lb / 7000 lb. |
Included Components
| Quantity | Part Number | Item Included |
|---|---|---|
| 4 | SW5 | Double-eye leaf spring, 25.25" long, 5-leaf, 1.75" wide. |
| 6 | H-3.875 | Hanger, 3.25" bolt height, 3.875" overall, 0.56" round holes. |
| 2 | EQ-E1 | Curved equalizer, 7.75" bottom hole to bottom hole center-to-center. |
| 8 | SL-2.562 | Shackle strap, 2.562" hole center, 3.75" x 1.25" x .23". |
| 14 | FA-7-187 | Greaseable wet equalizer / shackle bolt, hex head, 0.56" x 3". |
| 14 | FA-6-92Z | 7/16" flange nut for greaseable shackle bolts. |
| 14 | BU1-1566B | Bronze spring eye / equalizer bushing, 0.57" x 0.69" x 1.75". |
| 8 | UB-R302 | Round U-bolt, 3" x 7" x 1/2"-20. |
| 16 | 12N | 1/2"-20 U-bolt nut. |
| 4 | TP-4 | U-bolt tie plate with 3" center-to-center U-bolt holes. |
