Lippert 3,500 lb Trailer Axle Beam Kit — 86" Hub Face, 4" Drop, EZ Lube, 2.4" Tube
A 3,500 lb drop axle beam kit with 86" hub face, EZ Lube spindles, brake mounting flanges, and included loose spring perches for custom trailer axle replacement or build work.
Overview
This Lippert 3,500 lb trailer axle beam kit is built for applications requiring an 86" hub face axle with a 4" drop configuration. It includes EZ Lube spindles, brake mounting flanges, and loose spring perches so the Spring Center can be matched to the trailer before welding.
R&P Service Insight
Axle replacement is measurement-sensitive. Hub face, drop, brake flange spacing, spring center, and spindle style all need to match the trailer’s setup before installation.
- Drop Axle Design: The 4" drop helps lower trailer ride height compared with a straight axle configuration.
- EZ Lube Spindles: EZ Lube spindle design allows grease service through the spindle when compatible hubs and service procedures are used.
- Loose Spring Perches: The included perches must be welded in the correct position before the axle is placed into service.
R&P Knowledge Hub
Compatibility: Intended for trailer applications requiring a 3,500 lb axle beam with 86" hub face and 4" drop configuration.
Vehicle / System Fit: Trailer axle replacement or custom trailer build applications where hub face, spring center, drop, spindle type, and brake/hub components match.
Installation Notes: Spring perches are included loose and must be measured, positioned, squared, and welded before use.
Performance Insight: Drop axles lower trailer ride height by positioning the spindle below the axle tube centerline. Brake flanges allow compatible brake assemblies to be installed where the hub, drum, and brake package match.
Brand & Fitment Note
Selling Brand: Lippert axle beam kit sold by R&P Carriages.
Application Reference: Any trailer application language in this listing describes compatibility, measurement target, or axle configuration only where the buyer verifies dimensions and installation requirements.
What This Means: This listing is for a Lippert 3,500 lb trailer axle beam kit with loose spring perches included.
Before Ordering: Verify hub face, Spring Center, brake flange spacing, spindle requirements, hub and brake compatibility, axle drop, and included components before installation.
R&P Repair Insight
Most axle ordering problems come from matching only the weight rating while missing the measurements that control fit. Confirm the trailer’s existing axle dimensions before ordering.
- Hub Face: Confirm the required hub face width is 86" before ordering.
- Spring Center: This kit includes loose perches, so the Spring Center must be measured before welding.
- Brake / Hub Package: Brake mounting flanges are present, but hubs, drums, brakes, bearings, U-bolts, and related installation parts are not included unless separately shown or specified.
Features
3,500 lb Axle Beam
Built for trailer applications requiring a 3,500 lb axle beam with verified matching measurements.
86" Hub Face Width
Designed around an 86" hub face measurement for trailers requiring this axle width.
4" Drop Configuration
Drop axle design helps lower trailer ride height compared with a straight axle setup.
EZ Lube Spindles and Brake Flanges
Includes EZ Lube spindles and brake mounting flanges for compatible brake and hub configurations.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 3500-86-24-D-KIT |
| Brand | Lippert |
| Product Type | Trailer axle beam kit |
| Axle Capacity | 3,500 lb |
| Hub Face | 86" |
| Drop | 4" drop axle design |
| Brake Flange to Flange | 79.66" |
| Spindle End to End | 90.38" |
| Spindle Style | EZ Lube |
| Spring Perches | Included loose; must be welded before use |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Leaf-spring trailer axle applications |
| Primary Fit | Trailers requiring a 3,500 lb axle beam with 86" hub face and 4" drop |
| Brake Compatibility | Brake mounting flanges are included; verify brake assembly, hub, drum, bearing, and spindle compatibility before installation |
| Notes | Spring perches ship loose by default. Do not install, tow, or place the axle in service until perches are properly positioned and welded. |
Included Components
| Quantity | Item |
|---|---|
| 1 | Lippert 3,500 lb trailer axle beam |
| Integrated | EZ Lube spindles |
| Integrated | Brake mounting flanges |
| Included loose | Spring perches / spring seats for weld-on installation |
| Not included unless separately shown | Hubs, drums, brake assemblies, bearings, seals, U-bolts, plates, nuts, washers, and installation hardware |
What Comes in the -KIT: Spring Perches Are Included Loose
This -KIT includes the axle beam and loose spring perches / spring seats. The spring perches are included as separate pieces. Included does not mean welded.
Spring perches ship loose by default. They are not welded to the axle tube before shipment unless the customer specifically requests perch welding in the order notes, provides the correct Spring Center measurement, and R&P confirms the weld-on request before the axle ships.
Repetition matters: If the listing says “spring perches included,” that means loose spring perches are included with the kit. It does not mean the spring perches are already installed, welded, or ready for towing.
When Will R&P Weld the Spring Perches?
R&P may weld the spring perches before shipment only when the order clearly gives us the information needed to do it correctly.
- The customer must request welded spring perches in the order notes.
- The customer must provide the Spring Center measurement.
- R&P must confirm the weld-on request before shipment.
How to Find Your Spring Center Measurement
Spring Center is the distance from the center of one leaf spring to the center of the opposite leaf spring. This is the measurement used to locate where the spring perches need to be welded on the axle tube.
- Best method with old axle: Measure from the center of one existing spring perch / spring seat to the center of the opposite spring perch / spring seat.
- Best method from the trailer: Measure from the centerline of the left leaf spring pack to the centerline of the right leaf spring pack where the axle sits.
- Leaf spring center bolt method: Measure from the center of the center bolt / locating pin on one spring pack to the center of the center bolt / locating pin on the other spring pack.
- Do not measure outside-to-outside. Spring Center is a center-to-center measurement.
- Do not guess from deck width. Deck width can be helpful context, but it is not a substitute for the actual Spring Center measurement.
Axle Measurement Diagram
Use the axle measurement diagram below as a visual reference while confirming axle dimensions and installation details. Spring Center must still be measured center-to-center at the trailer’s leaf springs or existing spring perches.
Why Welding the Perches Matters
This image shows a real-world installation problem where loose spring perches were not welded before use and brake wiring was torn out. This is exactly why the axle must not be installed, towed, or placed into service while the spring perches are still loose.
Loose perches can allow the axle to move or rotate out of its intended installed position. That can damage brake wiring, brake components, suspension parts, tires, and the trailer. The perches must be properly welded before road use.
| Question | Answer |
|---|---|
| Are spring perches included in the -KIT? | Yes. The spring perches / spring seats are included as loose parts. |
| Are the spring perches welded on by default? | No. They ship loose by default. |
| Can R&P weld the perches before shipping? | Only if the customer requests it in the order notes, provides the correct Spring Center measurement, and R&P confirms the request before shipment. |
| What measurement is needed for welding? | Spring Center: center of one leaf spring / spring perch to the center of the opposite leaf spring / spring perch. |
| Can the axle be used with loose perches? | No. Do not install, tow, or place the axle in service until the perches are properly welded. |
| What can happen if perches are not welded? | Loose perches can allow the axle to move or rotate, which can damage brake wiring, brake parts, suspension components, tires, and the trailer. |
| Which way does camber face? | If the axle is cambered, the arch goes up in the middle when installed. |
Order Note Wording Customers Can Use
Customers who want R&P to weld the spring perches should put clear instructions in the order notes before checkout.
