At a Glance
- SKU: 3500-825-24-KIT
PRODUCT INFORMATION
Product Details
3.5K Trailer Axle Beam Kit
3.5k Straight Axle Beam, 82.5" HF, 2.4" Tube, Straight, with Loose Perches
A 3,500 lb straight trailer axle beam kit with an 82.5" hub face, 2.4" axle tube, and two loose weld-on spring perches. Built for trailer and camper axle replacement work where the measurements and spring-center setup match.
Part Number: 3500-825-24-KIT 82.5" Hub Face 2.4" Tube | Loose Perches
Overview
This 3.5K straight axle beam kit is a replacement axle solution for trailers or campers that commonly use 5-lug hubs or 10" drum brake assemblies. The kit includes the axle beam and two loose SP-2375 spring perches for weld-on installation at the correct Spring Center measurement.
R&P Service Insight
Axle replacement is measurement-driven. Before ordering, confirm hub face, tube diameter, spindle/bearing setup, brake flange spacing, and Spring Center requirements.
- Hub Face First: This listing is for an 82.5" hub face axle beam.
- Loose Perches: The included perches are not welded by default and must be positioned to your trailer’s Spring Center.
- Camber Direction: This straight axle beam is cambered; the arch goes up in the middle when installed.
R&P Knowledge Hub
Compatibility: Common replacement axle for trailers or campers that typically have 64.5" to 70.5" floor deck width and use 5-lug hubs or 10" drums where dimensions match.
Axle Setup: 3,500 lb straight axle beam, 82.5" hub face, 2.4" tube, cambered beam, EZ Lube spindle style.
Installation Notes: Spring perches are included loose. They must be measured, squared, and welded before the axle is placed into service.
Performance Insight: A properly measured axle keeps the hubs, tires, suspension, and frame tracking correctly. Do not guess axle measurements from deck width alone.
Brand & Fitment Note
Selling Brand: R&P Carriages curated axle kit using a Lippert 3,500 lb bare axle beam and loose SP-2375 spring perches.
Application Reference: This axle is intended for trailer and camper replacement applications where hub face, tube size, brake flange spacing, bearing setup, and spring layout match the existing trailer.
What This Means: This listing is for an axle beam kit with loose spring perches. It does not include hubs, drums, bearings, seals, brake assemblies, U-bolts, or mounting hardware unless specifically listed in the included components table.
Before Ordering: Verify the axle dimensions, hub face, brake flange spacing, spring-center requirement, hub/drum style, bearing set, seal, and brake configuration before installation.
R&P Repair Insight
This is a bare axle beam kit, not a complete hub-and-brake axle assembly. Reusing old hubs or brakes may be possible only when the existing parts match the spindle, bearing, seal, and brake-flange setup.
- Check the Bearings: This axle uses standard L44649 outer / L68149 inner bearings and 10-19 seals; these are not included.
- Check the Brake Setup: Confirm that your 10" drum or brake setup matches before transferring parts over.
- Check the Perches: Loose perches must be welded at the correct Spring Center before the axle is installed or towed.
Features
3,500 lb Straight Axle Beam
Replacement axle beam for 3.5K trailer and camper applications where the listed dimensions match the trailer.
82.5" Hub Face
Built around an 82.5" hub face measurement for trailers requiring this specific axle width.
Standard 2.4" Tube
Uses a standard 2.4" axle tube and includes SP-2375 spring perches for weld-on placement.
Loose Perch -KIT Configuration
Perches are included loose so they can be welded to the correct Spring Center for the trailer.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 3500-825-24-KIT |
| Axle Beam | Lippert 3,500 lb bare axle beam |
| Product Type | Straight trailer axle beam kit with loose weld-on spring perches |
| Hub Face | 82.5" |
| Tube Diameter | 2.4" |
| Brake Flange to Flange | 76.16" |
| Bearing Shoulder to Shoulder | 78.69" |
| Spindle End to End | 86.88" |
| Bearing / Seal Reference | Uses standard L44649 / L68149 bearings and 10-19 seals. Bearings and seals are not included. |
| Camber | Straight axle beam is cambered; install with the arch up in the center. |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Trailer or camper leaf-spring axle applications |
| Primary Fit | 3,500 lb axle replacement where 82.5" hub face, 2.4" tube, and listed measurements match. |
| Common Use Range | Often used on trailers or campers with approximately 64.5" to 70.5" floor deck width and 5-lug hubs or 10" drums, when the actual axle dimensions match. |
| Notes | Spring perches are included loose and must be welded at the correct Spring Center before road use. Do not install or tow with loose spring perches. |
Included Components
| Quantity | Item |
|---|---|
| 1 | 3500-825-24-KIT / Lippert Trailer Axle 3500 lb Bare Beam, 82.5" Hub Face, 2.4" Tube, Straight EZ Lube, USA Made |
| 2 | SP-2375 Spring Perch for 2.4" Axle Beam — ships loose unless welding is requested, measured, and confirmed before shipment |
| Not Included | Hubs, drums, bearings, seals, brake assemblies, U-bolts, plates, nuts, and installation hardware unless separately purchased or specifically listed. |
Important -KIT Axle Notice
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.
Do not install or tow with loose spring perches. The perches must be measured, positioned, squared, and welded to the axle tube before the axle is placed into service.
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.
Default rule: If the order does not clearly request welded perches and does not provide a Spring Center measurement, the spring perches ship loose.
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.
Example order note: “Please weld spring perches before shipping. My Spring Center measurement is ____ inches, measured center-to-center.”
Final reminder: Unless the order notes request welded perches, the Spring Center measurement is supplied, and R&P confirms the weld request, this -KIT ships with loose spring perches.
Thank You For Choosing R&P Carriages For Your Online Shopping Source!
Verify hub face, brake flange spacing, bearing and seal requirements, spindle style, tube diameter, Spring Center, and included components before installation. This kit includes loose spring perches by default; the axle must not be installed or towed until the perches are properly welded.
3500-825-24-KIT, 3.5k straight trailer axle, 82.5 inch hub face axle, 2.4 inch tube axle, 3500 lb axle beam, Lippert 3500 axle beam, trailer axle with loose perches, SP-2375 spring perch, weld on spring perch axle kit, 3500 lb EZ Lube axle beam, 5 lug trailer axle replacement, 10 inch drum trailer axle replacement
BEHIND THIS LISTING
PHOTOGRAPHY & RESEARCH
Ariah Granados
DIGITAL PRESENTATION & DEVELOPMENT
Ken Martin
ONLINE SALES & QUALITY ASSURANCE
Rayn Fisher
WE’RE HERE TO HELP
Not sure it fits?
Have your SKU or manufacturer part number, photos of the original part and mounting, and any critical measurements ready. Capacity, voltage, or bolt pattern can help too.
815-357-3292 · 270 E Jackson St · Seneca, IL 61360
CUSTOMER REVIEWS
Leave a Google review
Good people. Real trailer work.
Customer feedback summarized from Google and Yellow Pages. Dates are shown where available.
TRAILER PARTSGOOGLE
Ordered trailer repair parts repeatedly; praised fast service, careful packing, and accurate orders.
RV KEYSGOOGLE
Found the correct RV keys at a good price with free shipping; the keys worked as expected.
AXLE & LEAF SPRINGSGOOGLE
Needed an unusual axle and leaf-spring size; the team listened and helped him sort out the fit.
PARTS & SHIPPINGGOOGLE
Praised the OEM and aftermarket selection, discounts, quick shipping, and friendly parts staff.
CUSTOM AXLEGOOGLE
Got the axle he needed right away, set up with a custom spring perch.
WELDINGGOOGLE
Praised the polite staff and quality welding on a project.
GAS STRUTGOOGLE
Replacement struts brought a long-used door back to working order.
CUSTOM TRAILERGOOGLE
Had a trailer built to his needs at a fair price, then found parts for two other trailers in stock.
CUSTOMER SERVICEGOOGLE
Praised the customer service after working with R&P over several years.
GAS SHOCKGOOGLE
Found the gas shock he wanted at a good price with shipping included.
CARGO TIE-DOWNGOOGLE
Received swivel D-rings with backing plates and praised the price, correct order, and service.
PARTS DELIVERYGOOGLE
The right parts arrived the first time, with fast delivery and helpful staff.
PROJECT HELPYELLOW PAGES
Said project advice and prompt shipping helped finish a trailer project.
SHIPPINGYELLOW PAGES
Reported helpful service and fast shipment to Germany.
SUSPENSION KITYELLOW PAGES
Praised a suspension kit, fair pricing, and good parts.
TRAILER CORDYELLOW PAGES
Was pleased with a replacement trailer cord.
SERVICE & PARTSYELLOW PAGES
Noted dependable service and products across repeat visits.
AXLE INSTALLATIONYELLOW PAGES
Said the axle installation fit perfectly and thanked Josh and the crew.
HITCH REPLACEMENTYELLOW PAGES
Praised the crew’s professionalism during a difficult hitch replacement.
PRICE & SERVICEYELLOW PAGES
Liked the product, price, communication, and shipping.
LISTING INFORMATIONYELLOW PAGES
Said the product description explained what would work for the trailer.
PRODUCT & SHIPPINGYELLOW PAGES
Received the item as described with very fast shipping and plans to return.
COMMUNICATION & SHIPPINGYELLOW PAGES
Praised accurate description, quick shipping, and clear communication.
PRICE & PRODUCTYELLOW PAGES
Was happy with the product and its price.
SELLER EXPERIENCEYELLOW PAGES
Called it a pleasure doing business with R&P.
INSTALLATIONYELLOW PAGES
Was pleased with product quality, quick delivery, and an easy installation.
PRODUCTSYELLOW PAGES
Was enthusiastic about the products.
DURABILITYYELLOW PAGES
Was ready to install the product on every trailer they own.
REPEAT CUSTOMERYELLOW PAGES
Expected to buy again after a good experience.
INSTALLED PARTYELLOW PAGES
Reported that the newly installed parts were working perfectly.
REPEAT CUSTOMERYELLOW PAGES
Said things went well, as they had on previous visits.
COMMUNICATION & VALUEYELLOW PAGES
Praised clear communication and fair value.
TRANSACTIONYELLOW PAGES
Said the transaction went as expected.
PRICE & PACKAGINGYELLOW PAGES
Noted good value, careful packing, and fast shipping.
PROFESSIONAL SERVICEYELLOW PAGES
Found the team professional and easy to work with.
COMMUNICATION & SHIPPINGYELLOW PAGES
Praised fast shipping and good communication.
TEAMYELLOW PAGES
Shared appreciation for the owners and their company.
SHIPPINGYELLOW PAGES
Reported prompt shipping and said they would buy again.
CUSTOMER SERVICEYELLOW PAGES
Found R&P easy to deal with.
SERVICEYELLOW PAGES
Praised the people and the service.
FIT & SHIPPINGYELLOW PAGES
Reported a good fit, fair price, accurate listing, and quick shipping.
DELIVERYYELLOW PAGES
Received the order a day early and recommended the seller.
CUSTOM TRAILERYELLOW PAGES
Described a no-hassle, professional custom-trailer purchase.
TRAILER PURCHASEYELLOW PAGES
Praised a new trailer, custom additions, helpful staff, and clear pricing.
HUB COVERSYELLOW PAGES
Found the right hub covers quickly and got helpful maintenance advice.
AXLE HELPYELLOW PAGES
Said R&P helped their company get back on the road after an axle problem.
DUMP TRAILERYELLOW PAGES
Was happy with a dump-trailer purchase after comparing options.
BRAKES, DRUMS & SEALSYELLOW PAGES
Received clear help choosing brake assemblies and bearing seals, followed by fast shipping.
DUMP TRAILERYELLOW PAGES
Found a good deal on a 16-foot dump trailer and planned to return.
FRIENDLY SERVICEYELLOW PAGES
Thanked the staff for their patience and recommended the shop.
Showing 3 of 50
Need help with this part? Send photos, part numbers, and measurements. We’ll help you narrow it down.