Complete Suspension Rebuild Kit for 7K Tandem Trailer Axles 25" Springs Wet Bolts
Complete tandem axle suspension rebuild kit using 25.25" double-eye leaf springs, curved equalizers, hangers, wet bolts, bronze bushings, U-bolts, tie plates, and hardware for matching 3" round axle tube applications.
Overview
This R&P Carriages Suspension Rebuild Kit is built for a full tandem trailer axle suspension refresh where the springs, equalizers, hangers, shackles, bushings, U-bolts, tie plates, and mounting hardware are being replaced together. It includes four PR6 25.25" double-eye leaf springs, two EQ-E1 curved equalizers, six hangers, shackle straps, greaseable wet bolts, bronze bushings, U-bolts, U-bolt nuts, flange nuts, and tie plates for matching 7K tandem trailer axle-style suspension applications.
R&P Service Insight
Suspension rebuilds are best handled as a system. Replacing only one worn component can leave loose bushings, elongated bolt holes, or old equalizers creating the same trailer movement you were trying to fix.
- System Refresh: Includes springs, equalizers, shackles, wet bolts, bushings, hangers, U-bolts, and tie plates.
- Greaseable Hardware: Wet bolts and bronze bushings help support smoother suspension movement and serviceability when maintained properly.
- Fitment Check: Confirm spring length, axle tube diameter, hanger height, shackle length, and equalizer dimensions before ordering.
R&P Knowledge Hub
Compatibility: Intended for tandem trailer suspension rebuilds using 25.25" double-eye leaf springs and 7-3/4" curved equalizers.
Vehicle / System Fit: Designed around 7K tandem trailer axle suspension service with 3" round axle U-bolts and 5200 lb / 6000 lb / 7000 lb style tie plates where measurements match.
Installation Notes: Verify hanger spacing, equalizer geometry, axle tube size, U-bolt length, tie plate spacing, and spring eye-to-eye measurement before installation.
Performance Insight: Bronze bushings and greaseable wet bolts provide a more serviceable setup than standard dry bolt hardware when maintained properly.
Brand & Fitment Note
Selling Brand: R&P Carriages Suspension Rebuild Kit
Application Reference: Tandem trailer suspension rebuilds using 7K axle-style components, PR6 leaf springs, EQ-E1 equalizers, and 3" round axle U-bolts.
What This Means: This listing includes the suspension components and hardware listed below for a complete tandem axle suspension rebuild.
Before Ordering: Match your old components by spring length, spring width, equalizer hole spacing, axle tube diameter, U-bolt size, hanger height, shackle length, and included hardware requirements.
R&P Repair Insight
When rebuilding a tandem trailer suspension, inspect the full suspension path from hanger to hanger. Worn spring eyes, loose shackle bolts, ovaled equalizer holes, cracked hangers, and stretched U-bolts can all affect alignment, tire wear, trailer tracking, and ride quality.
- Check Spring Length: This kit uses 25.25" long, 1.75" wide PR6 double-eye leaf springs.
- Check Axle Tube: Included U-bolts are 3" x 7" x 1/2"-20 round U-bolts.
- Check Equalizer Size: Included EQ-E1 equalizers measure 7-3/4" bottom hole to bottom hole center to center.
Features
Complete Tandem Axle Rebuild Kit
Includes the major suspension components needed to rebuild both sides of a tandem trailer axle suspension system.
PR6 Double-Eye Leaf Springs
Includes four PR6 leaf springs measuring 25.25" long, 1.75" wide, 6-leaf construction, and 3500 lb rated per spring.
Wet Bolt & Bronze Bushing Upgrade
Greaseable wet bolts and bronze bushings are included for a more serviceable suspension setup.
3" Round Axle Mounting Hardware
Includes 3" x 7" x 1/2"-20 round U-bolts, matching nuts, and tie plates for common 5200 lb, 6000 lb, and 7000 lb axle-style applications where measurements match.
Specifications
| Specification | Detail |
|---|---|
| Part Number | CSRK-TA-WB-LE-BB-PR6 |
| Listing SKU | CSRK-TA-WB-LE-BB-PR6 |
| Brand | R&P Carriages |
| Product Type | Tandem Axle Suspension Rebuild Kit |
| Quantity Included | Complete kit as listed below |
| Application | 7K tandem trailer axle suspension rebuild |
| Material / Finish | Steel suspension components with bronze bushings; finish may vary by component |
| Key Measurement | 25.25" double-eye springs, 7-3/4" equalizers, 3" round axle U-bolts |
| Fitment | Tandem trailer leaf spring suspension systems where all listed measurements match |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Tandem trailer leaf spring suspension system |
| Primary Fit | 7K tandem trailer axle suspension applications |
| Secondary Fit / Common Uses | 5200 lb, 6000 lb, and 7000 lb axle-style suspension hardware where measurements match |
| Notes | Confirm all measurements before ordering. Trailer suspension parts should be matched by dimension, not only by axle rating. |
Detailed Measurements
| Key Dimension | Measurement |
|---|---|
| Leaf Spring | PR6, double eye, 25.25" long, 6 leaf, 3500 lb rated, 1.75" wide |
| Hanger | H-3.875, 3.25" bolt height, 3.875" overall, 0.56" round holes |
| Equalizer | EQ-E1 curved equalizer, 7.75" bottom hole to bottom hole center to center, 2.88" top hole to bottom hole center to center |
| Shackle Strap | SL-2.562, 2.562" hole center, 3.75" x 1.25" x .23" |
| Wet Bolt | FA-7-187, hex head, 0.56" x 3", greaseable, step down end 0.44" |
| Bronze Bushing | BU1-1566B, 0.57" x 0.69" x 1.75" |
| U-Bolt | UB-R302, round, 3" x 7" x 1/2"-20, fits 6000 lb / 7000 lb applications where measurements match |
| Tie Plate | TP-4, holes for U-bolts 3" center to center, fits 5200 lb / 6000 lb / 7000 lb applications where measurements match |
Included Components
| Quantity | Item |
|---|---|
| 4 | PR6 double-eye leaf springs — 25.25" long, 6 leaf, 3500 lb rated, 1.75" wide |
| 6 | H-3.875 hangers — 3.25" bolt height, 3.875" overall, 0.56" round holes |
| 2 | EQ-E1 curved equalizers — 7-3/4" bottom hole to bottom hole center to center |
| 8 | SL-2.562 shackle straps — 2.562" hole center, 3.75" x 1.25" x .23" |
| 14 | FA-7-187 greaseable equalizer / shackle bolts — hex head, 0.56" x 3", wet bolt, step down end 0.44" |
| 14 | FA-6-92Z flange nuts — 7/16", for greaseable shackle bolts |
| 14 | BU1-1566B bronze spring eye / equalizer bushings — 0.57" x 0.69" x 1.75" |
| 8 | UB-R302 round U-bolts — 3" x 7" x 1/2"-20, fits 6000 lb / 7000 lb applications where measurements match |
| 16 | 12N U-bolt nuts — 1/2"-20, for included U-bolts |
| 4 | TP-4 U-bolt tie plates — 3" center-to-center U-bolt holes, fits 5200 lb / 6000 lb / 7000 lb applications where measurements match |
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