Best Trailer Helper Spring

LIBRA 3500lb Tandem Trailer Axle Suspension Kit Leaf Springs U-Bolt & Hanger Kit

  • 1,750lbs capacity per each spring, for standard 3,500lbs trailer axle,Eye to Eye length: 25-1/4 inch, Free open: 3 inch, width of leaf: 1-3/4 inch, 4 leaves, 9/16 inch bushing dia, nylon bushings installed.
  • It will replace SW4B / 72-42 / LIB-401-DE / UNA212 / PR4B / 124903 / 9150014 / 93184 (different SKU# but same spring).
  • Include 3,500lbs axle U-bolt kit for 2-3/8" dia round trailer axles , Kit include: 4 x 5-1/2" long U bolts, U bolts dia. 1/2".
  • Include Complete tandem trailer axle hanger kit for 1-3/4" leaf springs, Kit include: 2 x EQ-E1 equalizers, 6 x 3" tall hangers, 8 x shackle straps, 14 x 9/16"-18 x 3" long shackle bolts and locknuts.
  • LIBRA has been supplying US OEM trailer industry for over 16 years, reliable and quality parts trusted by major trailer & trailer axle manufacturers..
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CURT 58270 7-Pin RV Blade Trailer Wiring Towing Vehicle Socket Tester, Black

  • VERSATILE. Quickly and confidently confirm the functionality of your vehicle's trailer wiring harness with this connector tester for the taillights, brake lights, reverse lights, turn signals, electric trailer brakes and auxiliary power.
  • SIMPLE TO USE. For each electrical function, an LED lights up indicating a good signal. Just plug the wiring tester into your vehicle's socket and have a helper check the LED signals as you activate them from the driver's seat.
  • EASY GRIP. Plugging in this 7-way trailer light tester into your vehicle is easy with its ergonomic design. It features two hooks on either side of the tester for a better grip when plugging in or unplugging.
  • LONG-LASTING LEDS. To produce a bright, easy-to-read signal and ensure long-lasting use, this vehicle-trailer wiring tester is constructed with LED diodes.
  • DURABLE HOUSING. To resist the elements and maintain reliable performance, the housing of this tow wiring tester is made from durable black plastic that will never rust or corrode.
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CURT 58271 7-Pin RV Blade Trailer Wiring Towing Vehicle Socket Tester, Black

  • VERSATILE. Quickly and confidently confirm the functionality of your vehicle's trailer wiring harness with this connector tester for the taillights, brake lights, reverse lights, turn signals, electric trailer brakes and auxiliary power.
  • SIMPLE TO USE. For each electrical function, an LED lights up indicating a good signal. Just plug the wiring tester into your vehicle's socket and have a helper check the LED signals as you activate them from the driver's seat.
  • EASY GRIP. Plugging in this 7-way trailer light tester into your vehicle is easy with its ergonomic design. It features two hooks on either side of the tester for a better grip when plugging in or unplugging.
  • LONG-LASTING LEDS. To produce a bright, easy-to-read signal and ensure long-lasting use, this vehicle-trailer wiring tester is constructed with LED diodes.
  • DURABLE HOUSING. To resist the elements and maintain reliable performance, the housing of this tow wiring tester is made from durable black plastic that will never rust or corrode.
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CURT 56413 Vehicle-Side Custom RV Blade 7-Pin Trailer Wiring Harness Fits Select Ford F-150 Black

  • EASY TO INSTALL. No cutting! No splicing! This trailer wiring harness plugs into existing original equipment wiring on your vehicle and equips it with....
  • HEAVY-DUTY CONNECTOR. The 7-way trailer wiring assembly can be used to connect trailer taillights, brake lights, reverse light signals, turn signals,....
  • VEHICLE-SPECIFIC. This vehicle-trailer wiring harness package is designed for select models of the Ford F-150.
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of the 7-pin vehicle wiring socket is made from durable black molded....
  • SPRING-LOADED COVER. To promote long-lasting use and weather resistance, this 7 pin trailer wiring harness kit comes with a spring-loaded dust cover.....
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CURT 58071 Vehicle-Side 4-Pin Round Trailer Wiring Harness Socket

  • SPRING-LOADED COVER. To promote long-lasting use and weather resistance, this round 4-pin trailer wiring socket comes with a spring-loaded dust cover.....
  • VERSATILE DESIGN. This vehicle-trailer wiring connector makes a great replacement 4-flat wiring socket. It matches industry-standard 4-way round....
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this 4-pin trailer wiring connector is made from strong, durable....
  • RELIABLE CONNECTION. This 4-way round trailer wiring socket is equipped with a locking tab on the inside of the dust cover that secures the plug in....
  • WEATHER-RESISTANT. To help protect the splice-in wiring connections, this 4-wire vehicle socket features concealed terminals, keeping the wires from....
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bROK Products 32973 Coupler 2\ Ball, 3\ Channel - 3500 lb.

  • PRECISE FIT. This trailer coupler is designed to mount onto a 3-inch wide trailer tongue beam and couple to any standard 2-inch diameter trailer ball.
  • EASILY ADJUSTABLE. Equipped with a posi-lock spring and adjustable nut on the inside, this trailer hitch coupler can easily be adjusted to ensure a snug fit on the trailer ball.
  • SECURE COUPLING. The posi-lock latch mechanism of this trailer tongue coupler accepts a safety pin or coupler lock for enhanced security.
  • HIGH-STRENGTH. Constructed from punched, die-cut steel, this trailer ball coupler is rated as a class 2 trailer coupler and has a capacity of 3,500 lbs. gross trailer weight and 500 lbs. tongue weight.
  • CORROSION-RESISTANT. To easily outlast the elements, including rain, snow, dirt, road grime and more, this straight tongue trailer coupler is finished in a durable zinc plating and makes a great boat trailer coupler.
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CURT 58090 Vehicle-Side 6-Pin Round Trailer Wiring Harness Socket

  • SPRING-LOADED COVER. To promote long-lasting use and weather resistance, this round 6-pin trailer wiring socket comes with a spring-loaded dust cover. It protects the 6-way connector when not in use, shielding it from the outdoor elements.
  • VERSATILE DESIGN. This vehicle-trailer wiring connector makes a great replacement 6-way wiring socket. It connects the taillights, brake lights, turn signals, electric trailer brakes and an auxiliary power wire.
  • DURABLE CONSTRUCTION. For long-lasting use and a reliable connection, the housing of this 4-pin trailer wiring connector is made from strong, durable die-cast metal.
  • RELIABLE CONNECTION. This 6-way round trailer wiring socket is equipped with a locking tab on the inside of the dust cover that secures the plug in place when inserted. This helps maintain a reliable wiring connection.
  • WEATHER-RESISTANT. To help protect the splice-in wiring connections, this 6-wire vehicle socket features concealed terminals, keeping the wires from direct exposure to rain, dirt, road salt and other corrosive threats (wires not included).
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CURT 17499 TruTrack 4P Weight Distribution Hitch with 4x Sway Control, Up to 8K, 2-Inch Shank

  • ACTIVE SWAY CONTROL. The TruTrack doesn't just level the vehicle and trailer. It also actively resists trailer sway. It uses a spring and cam system and fixed support brackets to stop trailer sway at four distinct points for a smoother, safer ride.
  • PRECISE WEIGHT DISTRIBUTION. The TruTrack weight distribution hitch with sway control offers precise levelling of your tow vehicle and trailer. It uses powerful 35-9/16-inch trunnion spring bars and an adjustable shank that fits a 2-inch receiver.
  • EASY SETUP. This CURT weight distribution hitch with trailer sway control is designed for fast, easy setup and adjustment. It features a tilting head with hex castle nuts for easy adjustment without completely disassembling the hitch.
  • HIGH-STRENGTH. For dependable towing strength, this weight distribution and anti-sway hitch is constructed with a welded head and cast steel pieces. This stabilizer hitch is rated for 5,000 to 8,000 lbs. GTW and 500 to 800 lbs. TW.
  • CORROSION-RESISTANT. This weight distribution hitch with sway control is finished with a highly durable carbide black powder coat to withstand the rigors of the outdoor elements.
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CURT 25100 Straight Tongue Trailer Coupler for 3-Inch Channel, 2-In Hitch Ball, 5,000 lbs

  • PRECISE FIT. This trailer coupler is designed to mount onto a 3-inch wide trailer tongue beam and couple to any standard 2-inch diameter trailer ball.
  • EASILY ADJUSTABLE. Equipped with a posi-lock spring and adjustable nut on the inside, this trailer hitch coupler can easily be adjusted to ensure a snug fit on the trailer ball.
  • SECURE COUPLING. The posi-lock latch mechanism of this trailer tongue coupler accepts a safety pin or coupler lock for enhanced security.
  • HIGH-STRENGTH. Constructed from punched, die-cut steel, this trailer ball coupler is rated as a class 3 trailer coupler and has a capacity of 5,000 lbs. gross trailer weight and 700 lbs. tongue weight.
  • CORROSION-RESISTANT. To easily outlast the elements, including rain, snow, dirt, road grime and more, this straight tongue trailer coupler is finished in a durable zinc plating and makes a great boat trailer coupler.
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