Rockwell American 7,000 lb Electric Brake Trailer Axle Kits

Rockwell American 7,000 lb Electric Brake Trailer Axle Kits

Build, repair, or upgrade your trailer with genuine Rockwell American 7,000 lb Electric Brake Trailer Axle Kits. Designed for equipment trailers, car haulers, dump trailers, cargo trailers, utility trailers, and other heavy-duty trailer applications, these axle kits deliver dependable braking performance, long-lasting durability, and reliable towing.

Available in Axle Only, Suspension Kit, Build Kit, and Running Gear Kit configurations, each package includes carefully matched components for trailer repairs, complete running gear replacement, or new trailer construction. Multiple hub face (HF) and spring center (SC) sizes are available to match your trailer frame and suspension.

Rockwell American trailer axles are part of the Dexter family of trailer axle brands and feature 12″ × 2″ electric brake assemblies, Posi-Lube® greaseable spindles, heavy-duty powder-coated axle beams, and premium components engineered for years of dependable service. Running Gear Kits also include 16″ 8-lug trailer wheels with ST235/80R16 radial trailer tires for a complete trailer running gear solution.

Made in America. Free Shipping in the Lower 48 States.

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Compare Kit Options

Select the trailer axle package that best matches your trailer repair, replacement, or new trailer build requirements.

← Swipe left/right to compare all kit options →

Axle Only: Includes a genuine Rockwell American 7,000 lb electric brake trailer axle with pre-installed 12″ × 2″ electric brake assemblies, hub-and-drum assemblies, and Posi-Lube® greaseable spindles. Ideal for replacing an existing trailer axle while reusing your current suspension.

Suspension Kit: Includes everything in Axle Only plus double-eye leaf springs and a U-bolt kit. Ideal for replacing worn axle and suspension components while retaining your existing hanger system.

Build Kit: Includes everything in the Suspension Kit plus a complete single-axle hanger kit. Ideal for new trailer construction, frame-up builds, and complete suspension replacement.

Running Gear Kit: Our most complete package, adding matching 16″ 8-lug trailer wheels and ST235/80R16 radial trailer tires for a near bolt-on running gear solution.

Axle Only and Suspension Kit configurations are commonly selected for repairs and partial upgrades. Build Kit and Running Gear Kit configurations are ideal for complete trailer builds and major running gear replacements.

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Choose Your Axle Size (Hub Face / Spring Center)

Select the hub face (HF) and spring center (SC) measurements that match your trailer frame and suspension setup for proper alignment, tire clearance, wheel positioning, and safe towing performance.

• Hub Face (HF): Measured from the wheel-mounting surface on one hub to the wheel-mounting surface on the opposite hub.
• Spring Center (SC): Measured from the center of one spring seat to the center of the opposite spring seat.

Correct hub face and spring center measurements help ensure proper suspension alignment, fender clearance, wheel positioning, and overall trailer fitment.

Not sure which axle size you need? Read our How to Measure a Trailer Axle Guide or contact us, and we’ll help verify your measurements before you order.

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Why Choose Rockwell American?

• Made in America: Genuine Rockwell American trailer axle components manufactured in the USA and backed by the Dexter family of trailer axle brands.
• 7,000 lb Capacity: Heavy-duty single axle rated for 7,000 lbs GAWR, making it ideal for equipment trailers, dump trailers, car haulers, cargo trailers, and other demanding applications.
• 12″ × 2″ Electric Brakes: Pre-installed electric brake assemblies provide dependable stopping power and improved towing confidence.
• Posi-Lube® Spindles: Integrated grease fittings simplify routine bearing lubrication without removing the hubs.
• Heavy-Duty 3″ Axle Tube: High-strength cambered axle beam promotes proper wheel alignment, stable towing, and even tire wear under load.
• Durable Powder-Coated Finish: Helps protect against corrosion, road debris, weather exposure, and everyday trailer use.
• 8 on 6.5 Bolt Pattern: Compatible with most common heavy-duty 8-lug trailer wheels used on 7,000 lb trailer axles.

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Posi-Lube® Spindle System

Every Rockwell American 7,000 lb trailer axle included in these axle kits features genuine Posi-Lube® greaseable spindles, making routine bearing maintenance quicker and easier than traditional axle designs.

Grease is delivered through the center of each spindle and distributed directly into the hub assembly, helping purge old grease while reducing bearing maintenance time. When serviced correctly, Posi-Lube® spindles help maximize bearing life and keep your trailer operating reliably.

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Common Applications

• Equipment Trailers
• Car Haulers
• Dump Trailers
• Cargo Trailers
• Utility Trailers
• Flatbed Trailers
• Construction Trailers
• Farm & Ranch Trailers
• Custom Trailer Builds

These Rockwell American 7,000 lb electric brake trailer axle kits are ideal for trailer repairs, running gear replacement, suspension upgrades, and complete trailer construction.

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Fitment & Capacity Notes

• Verify your hub face (HF) and spring center (SC) measurements before ordering.
• Confirm the selected 8 on 6.5 bolt pattern matches your existing or planned trailer wheels.
• Verify wheel, tire, suspension, brake, and trailer frame ratings before loading.
• Check for adequate tire, fender, and frame clearance throughout suspension travel.
• Electric brakes require a compatible brake controller, properly functioning trailer wiring, and a breakaway system where required.
• The 7,000 lb Gross Axle Weight Rating (GAWR) represents the maximum load capacity of the axle itself and does not determine your trailer’s overall GVWR or payload capacity.
• Overall trailer capacity is limited by the lowest-rated component in the complete trailer system.
• Hanger installation, axle alignment, and welding should be completed by a qualified trailer fabricator when applicable.

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Frequently Asked Questions

What is the difference between the kit options?

Axle Only includes a genuine Rockwell American 7,000 lb electric brake trailer axle with pre-installed hub-and-drum assemblies and Posi-Lube® greaseable spindles. The Suspension Kit adds double-eye leaf springs and a U-bolt kit. The Build Kit includes everything in the Suspension Kit plus a complete single-axle hanger kit. The Running Gear Kit includes everything in the Build Kit plus two 16″ 8-lug trailer wheels and ST235/80R16 radial trailer tires.

How do I measure my trailer axle?

The two main measurements are Hub Face (HF) and Spring Center (SC). Hub Face is measured from the wheel-mounting surface on one hub to the wheel-mounting surface on the opposite hub, while Spring Center is measured from the center of one spring seat to the center of the opposite spring seat. You can also read our How to Measure a Trailer Axle Guide for additional help.

What size brakes are included?

These Rockwell American 7,000 lb trailer axle kits include pre-installed 12″ × 2″ electric brake assemblies for dependable stopping performance and improved towing control.

What are Posi-Lube® spindles?

Rockwell American Posi-Lube® spindles use integrated grease fittings and an internal lubrication passage to help direct grease into the hub assembly during routine maintenance, making bearing lubrication faster and more convenient.

Can I reuse my existing trailer suspension?

Yes, provided your existing suspension components match the axle capacity, spring width, spring length, hanger spacing, and mounting configuration. Many customers choose the Suspension Kit or Build Kit when replacing worn suspension components at the same time.

What trailers are these axle kits commonly used on?

These Rockwell American 7,000 lb electric brake trailer axle kits are commonly used on equipment trailers, car haulers, dump trailers, cargo trailers, utility trailers, flatbed trailers, farm trailers, and custom trailer builds.

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Resources & Downloads

• Rockwell American Trailer Axle Service Manual
• Single-Axle Hanger Kit Spacing Guide
• How to Measure a Trailer Axle
• Johnson Trailer Parts YouTube Channel

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Installation Video

Watch our installation video for helpful guidance on trailer axle measurements, suspension setup, hanger placement, replacement axle selection, and general trailer axle installation.

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Questions?

Need help choosing the correct 7,000 lb trailer axle kit, verifying your hub face and spring center measurements, or selecting the right kit configuration? Our knowledgeable team is happy to help confirm fitment before you order.

Call or Text: (602) 292-9690

Email: sales@johnsontrailerparts.com