At a Glance
- SKU: 8000-865-35-KIT
PRODUCT INFORMATION
Product Details
Trailer Axle Beam — True 8K Dexter Running Gear
Dexter 8,000 lb Trailer Axle Beam – 86.5" Hub Face – 3.5" Tube – EZ Lube – 4-Bolt Brake Flange
Heavy-duty Dexter 8K axle beam with 86.5" hub face, 3.5" tube, EZ Lube spindle configuration, and loose SS-350 spring perches included for final spring-center setup.
Part Number: 8000-865-35-KIT 86.5" Hub Face / 3.5" Tube TRUE 8K Dexter Axle
Overview
This Dexter 8,000 lb trailer axle beam is built for heavy-duty trailer running gear applications where an 86.5" hub face, 3.5" axle tube, 4-bolt brake flange, and TRUE 8K component match are required. It is intended for use with compatible 12.25" x 3.375" brake systems and matching Dexter 8-285 style hub/drum assemblies where all measurements and components match the trailer.
R&P Service Insight
An 8K axle beam must be matched carefully. Hub face, spring center, brake size, bearing set, seal size, and flange pattern all matter before installation.
- Hub Face: This axle uses an 86.5" hub-face measurement. Verify against the old axle before ordering.
- Spring Perches: SS-350 spring perches are included loose and must be welded at the correct spring center before road use.
- Brake Match: Designed around TRUE 8K running gear using 12.25" x 3.375" brake assemblies and compatible hub/drum components.
R&P Knowledge Hub
Compatibility: TRUE 8K Dexter axle configuration for compatible 8,000 lb trailer running gear setups.
Vehicle / System Fit: Trailer axle beam for heavy-duty trailers requiring 86.5" hub face, 3.5" tube, EZ Lube spindle setup, and 4-bolt brake flange configuration.
Installation Notes: Always verify hub face, brake flange-to-flange, bearing shoulder-to-shoulder, spindle end-to-end, spring center, bearing set, seal size, and brake/hub compatibility before installation.
Performance Insight: A TRUE 8K axle setup must stay matched as a system. Confirm brake assemblies, drums, bearings, seals, wheels, tires, suspension, and trailer frame requirements before placing the axle into service.
Brand & Fitment Note
Selling Brand: R&P Carriages / Need A Trailer Part
Application Reference: Dexter and 8K references describe the axle configuration, component family, and fitment target where supported by verified measurements and compatible running gear.
What This Means: This listing is for one Dexter 8,000 lb trailer axle beam with loose spring perches included. Required brake assemblies, hub/drums, bearings, seals, wheels, tires, U-bolts, and mounting hardware are not included unless specifically listed.
Before Ordering: Verify all axle measurements, spring center, brake size, flange pattern, bearing set, seal size, hub/drum requirements, and included components before installation.
R&P Repair Insight
When replacing a trailer axle beam, do not rely on capacity alone. Two 8K axle beams can look similar but use different hub-face dimensions, spindle layouts, brake/hub combinations, spring centers, and seal requirements.
- Confirm The Old Axle: Measure hub face, spring center, brake flange-to-flange, bearing shoulder-to-shoulder, and spindle end-to-end whenever possible.
- Check The Running Gear: Match the axle to compatible 12.25" x 3.375" brakes, Dexter 8-285 style drums, 25580 inner bearings, 02475 outer bearings, and the correct seal setup.
- Install Camber Correctly: If the axle is cambered, the arch faces up in the middle when installed under the trailer.
Features
TRUE 8K Dexter Configuration
Built for heavy-duty 8,000 lb trailer axle applications where a TRUE 8K Dexter running gear match is required.
86.5" Hub Face Measurement
Designed for trailer setups requiring an 86.5" hub-face axle beam. Always compare this measurement to the original axle.
3.5" Heavy-Duty Axle Tube
The 3.5" axle tube supports the larger 8K beam configuration and must be paired with compatible spring seats and suspension hardware.
Loose SS-350 Spring Perches Included
Two SS-350 spring perches are included loose for final spring-center placement and welding before the axle is used.
Specifications
| Specification | Detail |
|---|---|
| Part Number | 8000-865-35-KIT |
| Brand / Configuration | Dexter TRUE 8K axle configuration |
| Product Type | Trailer axle beam |
| Capacity | 8,000 lb axle class |
| Hub Face | 86.5" |
| Brake Flange to Flange | 77.41" |
| Bearing Shoulder to Shoulder | 83.625" |
| Spindle End to End | 92.375" |
| Tube Diameter | 3.5" |
| Brake Flange | 4-bolt brake flange |
| Bearing Set | 25580 inner / 02475 outer |
| Seal Size | 2.25" typical; some older trailers may use 2.125" |
| Brake Size Compatibility | 12.25" x 3.375" |
| Hub / Drum Compatibility | Dexter 8-285 style hub/drum assemblies where specifications match |
Fitment / Application
| Category | Details |
|---|---|
| Vehicle / System | Heavy-duty trailer running gear |
| Primary Fit | Trailers requiring an 86.5" hub-face TRUE 8K axle beam with 3.5" tube |
| Brake System | Compatible 8,000 lb electric brake assemblies, typically 12.25" x 3.375" |
| Hub / Drum System | Dexter 8-285 style drum/hub assemblies where all bearing, seal, and brake specifications match |
| Notes | Spring center must be verified and perches must be welded before the axle is placed into service. |
Included Components
| Quantity | Item |
|---|---|
| 1 | Dexter 8000-865-35-KIT trailer axle beam — 86.5" hub face, 3.5" tube, EZ Lube, 4-bolt brake flange |
| 2 | SS-350 spring perches for 3.5" axle beam — included loose |
Required Components Not Included
| Component | Specification / Note |
|---|---|
| Brake Assemblies | 8,000 lb electric brakes, typically 12.25" x 3.375" |
| Drums / Hubs | Dexter 8-285 style drum/hub assemblies where specifications match |
| Bearings | 25580 inner / 02475 outer |
| Seals | 2.25" ID typical; verify against the trailer and hub/drum setup |
| Suspension Hardware | U-bolts, plates, nuts, wheels, tires, brake wiring, and related mounting hardware are not included unless specifically listed. |
Important Axle Perch Notice
Spring Perches Are Included Loose
This listing includes the axle beam and two loose SS-350 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 axle. 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? | Yes. Two SS-350 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 axle ships with loose spring perches.
Thank You For Choosing R&P Carriages For Your Online Shopping Source!
Verify hub face, spring center, brake flange pattern, bearing set, seal size, brake size, hub/drum compatibility, suspension hardware, wheel/tire rating, and included components before installation. Spring perches must be welded before the axle is placed into service.
8000-865-35 dexter axle 86.5 hub face trailer axle dexter 8000 lb axle beam 3.5 inch tube axle 8k true 8k trailer axle 4 bolt flange 25580 02475 bearing axle dexter 8-285 compatible axle beam 12.25 x 3.375 brake axle 8000 lb trailer running gear trailer axle beam with loose spring perches SS-350 spring perch 3.5 axle tube EZ Lube 8K trailer axle
Related Parts & Kits
Check fitment, measurements, and kit contents before ordering. Related parts may not be required for your repair.
Looking up part numbers in our catalog…
Your repair list1 item selected
Selected products are added together. Review the cart and verify kit contents to prevent duplicates. Prices and discounts are determined at checkout.
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.