Custom 3,500 lb Trailer Axle
57.75" Hub Face 44.75" Spring Centers 5 on 5-1/2" Hubs
R&P Carriages custom trailer axle build for applications requiring a 3,500 lb axle, 57.75" hub face, 44.75" spring centers, underslung spring configuration, and 5 on 5-1/2" hub bolt pattern.
Specifications
| Specification | Detail |
|---|---|
| Product Type | Custom trailer axle |
| Brand | R&P Carriages custom axle listing |
| Axle Capacity | 3,500 lb |
| Hub Face | 57.75" |
| Spring Centers | 44.75" |
| Spring Configuration | Underslung / under-slung spring setup |
| Bolt Pattern | 5 on 5-1/2" / 5 x 5.50" |
| Hub Style | 5 x 5.50" hubs |
| Build Time | Custom axle — approximately 30-day ship time |
| Shipping Note | $60 fixed shipping cost noted for this custom axle order |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Trailer axle replacement or custom trailer build |
| Primary Fit | Trailers requiring a 3,500 lb axle with 57.75" hub face and 44.75" spring centers |
| Wheel Pattern | For wheels matching 5 on 5-1/2" bolt pattern |
| Spring Setup | Underslung configuration where the spring and axle layout match the trailer setup |
| Notes | Verify hub face, spring center spacing, spring-over/spring-under configuration, wheel bolt pattern, brake requirements, and trailer load requirements before ordering. Custom axle orders should be confirmed before production. |
Overview
This R&P Carriages custom 3,500 lb trailer axle is built for applications requiring a 57.75" hub face, 44.75" spring center spacing, underslung spring configuration, and 5 on 5-1/2" hubs. It is intended for buyers who need a measurement-specific axle rather than a standard off-the-shelf replacement.
R&P Service Insight
Custom axle fitment depends on accurate measurements. Hub face, spring center spacing, spring orientation, and hub bolt pattern all need to match the trailer before production.
- Hub Face Check: Confirm 57.75" hub face is correct for the trailer.
- Spring Center Check: Confirm 44.75" spring center spacing before production.
- Bolt Pattern Check: Confirm your wheels use a 5 on 5-1/2" bolt pattern before ordering.
R&P Knowledge Hub
Compatibility: Built for trailer applications where the supplied hub face, spring center spacing, capacity, spring configuration, and wheel bolt pattern match.
Vehicle / System Fit: 3,500 lb trailer axle applications requiring a 57.75" hub face and 44.75" spring centers.
Installation Notes: Verify spring seat location, under-slung configuration, wheel bolt pattern, and any brake or hub requirements before installation.
Ordering Insight: Custom axles are measurement-specific. Once production begins, fitment depends on the accuracy of the supplied axle dimensions.
Brand & Fitment Note
Selling Brand: R&P Carriages custom axle listing.
Application Reference: This listing is based on the supplied axle measurements and hub configuration.
What This Means: This is a custom axle build, not a universal replacement for every 3,500 lb trailer axle.
Before Ordering: Confirm all dimensions, spring configuration, hub bolt pattern, brake requirements, and shipping/build details before production.
R&P Repair Insight
The most common axle ordering issues come from measuring the wrong points, mixing spring-over and spring-under terminology, or matching capacity while overlooking bolt pattern and hub face. Confirm each detail before purchase.
- Measure Hub Face Correctly: Hub face is measured from the wheel mounting surface on one hub to the wheel mounting surface on the opposite hub.
- Measure Spring Centers Correctly: Spring center is measured from the center of one spring seat to the center of the other spring seat.
- Confirm Setup: This listing references an underslung spring configuration and 5 on 5-1/2" hub bolt pattern.
Features
Custom 3,500 lb Axle Build
Built for the listed 3,500 lb trailer axle application and supplied dimensions.
57.75" Hub Face
Configured for trailer applications requiring a 57.75" hub face measurement.
44.75" Spring Centers
Spring center spacing supplied as 44.75" for the specified trailer setup.
5 on 5-1/2" Hub Pattern
Includes the listed 5 x 5.50" hub bolt pattern for compatible wheels.
Included Components
| Quantity | Item |
|---|---|
| 1 | Custom 3,500 lb trailer axle configured to supplied dimensions |
| Included as specified | 5 x 5.50" hubs |
| Not specified | Brake assemblies, U-bolts, springs, mounting hardware, wheels, and tires are not listed as included unless confirmed separately. |
