Shop Rockwell American trailer axles and parts at Johnson Trailer Parts. Rockwell American is a leading US manufacturer of trailer axles, leaf springs, and suspension components, known for their Posi-Lube spindle system and superior powder coat finish. We carry Rockwell American electric brake axles, idler axles, and complete axle kits with free shipping on qualifying orders in the lower 48 states.
Rockwell American
Showing 1–16 of 19 results
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Suspension, Trailer Parts
Axle Spring and U-Bolt Kit – (2) 6-Leaf Springs, 1/2″ U-Bolts – 7,000 lb Capacity
Suspension, Trailer PartsAxle Spring and U-Bolt Kit – (2) 6-Leaf Springs, 1/2″ U-Bolts – 7,000 lb Capacity
The Axle Spring Kit includes two 6-leaf double-eye springs built for superior strength, balance, and durability. Rated at 3,500 lbs per spring (7,000 lbs per pair), these heavy-duty springs deliver reliable suspension performance for dump, equipment, utility, and cargo trailers. Designed to flex and absorb road shock, they reduce frame stress and maintain stable ride quality under heavy loads.
SKU: 9150021-03
SKU: 9150021-03 -
Suspension, Trailer Parts
4-Leaf Double-Eye Trailer Spring – 1,750 lb Capacity
The Trailer Parts Pro™ 4-Leaf Double-Eye Trailer Spring is a dependable suspension solution for 3,500 lb trailer axles. Built from high-strength spring steel, this 25-1/4″ long, 1-3/4″ wide spring flexes to absorb road shock and reduce bounce — protecting your frame and cargo. The included nylon bushing ensures smooth movement for a stable, level ride. Perfect for utility, boat, cargo, and landscape trailers.
SKU: PR4B
SKU: PR4B -
Suspension, Trailer Parts
6-Leaf Double-Eye Trailer Spring – 3,500 lb Capacity
The Trailer Parts Pro™ 6-Leaf Double-Eye Trailer Spring is built for maximum strength and performance on 7,000 lb trailer axles. Each spring delivers a 3,500 lb load capacity, providing superior stability and support for heavy-duty trailers. Made from high-strength spring steel, it flexes to absorb road shock, minimize bounce, and protect your trailer’s frame and cargo. Ideal for equipment, car hauler, cargo, and utility trailers, this spring ensures long-lasting durability and a smoother ride.
SKU: PR6
SKU: PR6 -
Dump Trailer Parts Kits, Trailer Parts Kits
10.4K Dump Trailer Parts Kit – PH516 Hoist
* Free Shipping to Commercial Address in the Lower 48 States or Freight Terminal Near You, Contact us at 602-292-9690 for Assistant with Freight Terminals near you*
SKU: 14K-S Dump Trailer Parts Kit - PH516 Hoist-1 -
5,200 lb Axles, Rockwell American Axles, Trailer Axles
5,200 lb Electric Brake Axle
5,200 lb Electric Brake Axle — Complete single-axle with 12″ x 2″ electric brakes, 6 on 5.5 bolt pattern hubs. Choose your hub-face / spring-center (HF/SC) for a perfect fit. Posi-Lube spindles and powder-coated 3″ tube for easy service and durability. Free Shipping in the Lower 48 states.SKU: n/a -
5,200 lb Axles, Rockwell American Axles, Trailer Axles
5,200 lb Electric Brake Axle Running Gear Set
5,200 lb Electric Brake Axle Running Gear Set — Complete single-axle kit with 12″ x 2″ electric brakes, 6 on 5.5 bolt pattern hubs, double-eye leaf springs, and U-bolt kit. Choose your hub-face / spring-center (HF/SC) for a perfect fit. Posi-Lube spindles and powder-coated 3″ tube for easy service and durability. Free Shipping in the Lower 48 states.SKU: n/a -
5,200 lb Axles, Rockwell American Axles, Trailer Axles
5,200 lb Electric Brake Axle Running Gear Kit
5,200 lb Electric Brake Axle Running Gear Kit — Complete single-axle kit with 12″ x 2″ electric brakes, 6 on 5.5 bolt pattern hubs, double-eye leaf springs, U-bolt kit and Hanger Kit. Choose your hub-face / spring-center (HF/SC) for a perfect fit. Posi-Lube spindles and powder-coated 3″ tube for easy service and durability. Free Shipping in the Lower 48 states.SKU: n/a -
10,400 lb Capacity, 5,200 lb Axles, Rockwell American Axles, Tandem Axle Kits, Trailer Axles
Tandem 5,200 lb Electric Brake Axle Running Gear Set
10,400 lb Capacity, 5,200 lb Axles, Rockwell American Axles, Tandem Axle Kits, Trailer AxlesTandem 5,200 lb Electric Brake Axle Running Gear Set
Tandem 5,200 lb Electric Brake Axle Running Gear Set (10,400 lb total capacity) — Complete kit with brakes on both axles, 6 on 5.5 hubs, double-eye leaf springs, U-bolt kits, and hanger kit. Choose hub-face and spring center for perfect fit. Posi-Lube spindles and powder-coated tubes for easy service and durability. Free Shipping in Lower 48 states.SKU: n/a -
10,400 lb Capacity, 5,200 lb Axles, Rockwell American Axles, Tandem Axle Kits, Trailer Axles
Tandem 5,200 lb Electric Brake Axle Kit w/ Wheels & Tires (10,400 lb Capacity)
10,400 lb Capacity, 5,200 lb Axles, Rockwell American Axles, Tandem Axle Kits, Trailer AxlesTandem 5,200 lb Electric Brake Axle Kit w/ Wheels & Tires (10,400 lb Capacity)
Tandem 5,200 lb Electric Brake Axle Kit w/ Wheels & Tires (10,400 lb Capacity) — Complete kit with brakes on both axles, 6 on 5.5 hubs, double-eye leaf springs, U-bolt kits, hanger kit and 6 lug wheels with Radial Tires. Choose hub-face and spring center for perfect fit. Posi-Lube spindles and powder-coated tubes for easy service and durability. Free Shipping in Lower 48 states.SKU: n/a -
14,000 lb Capacity, 7,000 lb Axles, Rockwell American Axles, Tandem Axle Kits, Trailer Axles
Tandem 7,000 lb Electric Brake Axle Kit
14,000 lb Capacity, 7,000 lb Axles, Rockwell American Axles, Tandem Axle Kits, Trailer AxlesTandem 7,000 lb Electric Brake Axle Kit
Tandem 7,000 lb Electric Brake Axle Kit (14,00 lb total capacity) — Complete kit with brakes on both axles, 8 on 6.5″ hubs, double-eye leaf springs, U-bolt kits, and hanger kit. Choose hub-face and spring center for perfect fit. Posi-Lube spindles and powder-coated tubes for easy service and durability. Free Shipping in Lower 48 states.SKU: n/a -
14,000 lb Capacity, 7,000 lb Axles, Rockwell American Axles, Tandem Axle Kits, Trailer Axles
Tandem 7,000 lb Electric Brake Axle Kit w/ Wheels & Tires
14,000 lb Capacity, 7,000 lb Axles, Rockwell American Axles, Tandem Axle Kits, Trailer AxlesTandem 7,000 lb Electric Brake Axle Kit w/ Wheels & Tires
Tandem 7,000 lb Electric Brake Axle Kit w/ Wheels & Tires (14,00 lb total capacity) — Complete kit with brakes on both axles, 8 on 6.5″ hubs, Double-eye leaf springs, U-bolt kits, Hanger kit and Radial tires with wheels. Choose hub-face and spring center for perfect fit. Posi-Lube spindles and powder-coated tubes for easy service and durability. Free Shipping in Lower 48 states.SKU: n/a -
Trailer Parts, U-Bolts Kits
U-Bolt Kit for Mounting a 2-3/8″ Round Trailer Axle (3,500-lbs)
Mount your 2-3/8″ Round Diameter 3,500-lb Trailer Axle to your Trailers Leaf Springs with this U-Bolt Kit
Fits 1-3/4″ Wide Springs
Included Parts in this U-Bolt Kit:
(4) – U-Bolts ( 1/2″ 20 x 5.50″ Long )
(2) – U-Bolt Plates
(8) – 1/2″ Flanged Nuts
SKU: APUBR-1
SKU: APUBR-1 -
Trailer Axles, Trailer Parts, U-Bolts Kits
U-Bolt Kit for Mounting a 3″ Round Trailer Axle (5,200-7,000 lbs)
Trailer Axles, Trailer Parts, U-Bolts KitsU-Bolt Kit for Mounting a 3″ Round Trailer Axle (5,200-7,000 lbs)
Mount your 3″ Round Diameter Trailer Axle to your Trailers Leaf Springs with this U-Bolt Kit (5,200-7,000 lb Axles)
Fits 2″ Wide Springs
Included Parts in this U-Bolt Kit:
(4) U-Bolts ( 9/16″ – 18 x 7″ Long )
(2) U-Bolt Plates
(8) Hex Nuts (9/16″ – 18)
(8) Split Lock Washers (9/16″)
SKU: n/a -
14,000 lb Capacity, 7,000 lb Axles, Rockwell American Axles, Tandem Axle Kits, Trailer Axles
Tandem 7k Electric Brake Axle Kit – Slipper Springs
14,000 lb Capacity, 7,000 lb Axles, Rockwell American Axles, Tandem Axle Kits, Trailer AxlesTandem 7k Electric Brake Axle Kit – Slipper Springs
Tandem 7k Electric Brake Axle Kit – Slipper Springs (14,00 lb total capacity) — Complete kit with brakes on both axles, 8 on 6.5″ hubs, Slipper springs, U-bolt kits, and hanger kit. Choose hub-face and spring center for perfect fit. Posi-Lube spindles and powder-coated tubes for easy service and durability. Free Shipping in Lower 48 states.SKU: Tandem 7k Brake Axle Kit | Slipper Springs -
14,000 lb Capacity, 7,000 lb Axles, Rockwell American Axles, Tandem Axle Kits, Trailer Axles
Tandem 7k Electric Brake Axle Kit – Slipper Springs – ST235/80R16
14,000 lb Capacity, 7,000 lb Axles, Rockwell American Axles, Tandem Axle Kits, Trailer AxlesTandem 7k Electric Brake Axle Kit – Slipper Springs – ST235/80R16
Tandem 7k Electric Brake Axle Kit – Slipper Springs – ST235/80R16 (14,00 lb total capacity) — Complete kit with brakes on both axles, 8 on 6.5″ hubs, Slipper springs, U-bolt kits, hanger kit and Radial Tires. Choose hub-face and spring center for perfect fit. Posi-Lube spindles and powder-coated tubes for easy service and durability. Free Shipping in Lower 48 states.SKU: Tandem 7k Brake Axle Kit | Slipper Springs | ST235/80R16 -
3,500 lb Axles, Rockwell American Axles, Trailer Axles
Rockwell American 3,500 lb Idler Trailer Axle Kits
3,500 lb Axles, Rockwell American Axles, Trailer AxlesRockwell American 3,500 lb Idler Trailer Axle Kits
Rockwell American 3,500 lb Idler Trailer Axle Kits — configurable single-axle trailer axle kits available in Axle Only, Suspension Kit, Build Kit, and Running Gear Kit options. Choose your hub-face / spring-center (HF/SC), bolt pattern, and wheel & tire options for the right fit for your utility, cargo, landscape, or equipment trailer. Running Gear Kits include trailer wheels and radial tires. Free Shipping in the Lower 48 states.
SKU: RA35-SIA
