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Class 4 Ball Mount 10,000 LBS Tow Kit w/ Dual 2" + 1-7/8" Balls - 2" Shank 2" Drop 1,000 LBS Tongue Capacity Flip Around 1" Rise Includes Pin/Clip

Class 4 Ball Mount Starter Kit 10,000 LBS Tow Kit w/ Dual 2" + 1-7/8" Balls - 2" Shank 2" Drop 1,000 LBS Tongue Capacity Flip Around 1" Rise Includes Pin/Clip Curt Part Numbers 45310 21500 40090
Class 4 Ball Mount 10,000 LBS Tow Kit w/ Dual 2" + 1-7/8" Balls - 2" Shank 2" Drop 1,000 LBS Tongue Capacity Flip Around 1" Rise Includes Pin/Clip
$61.99
  • Stock: In Stock
  • Brand: Curt
  • Model: 45310 21500 40090-CB1

Applies to this product only

Class 4 Ball Mount 10,000 LBS Tow Kit w/ Dual 2" + 1-7/8" Balls - 2" Shank 2" Drop 1,000 LBS Tongue Capacity Flip Around 1" Rise Includes Pin/Clip

Part 1: Class 4 Ball Mount (Part #45520)

When you demand more from your towing equipment, CURT class 4 ball mounts answer the call. Our heavy-duty ball mounts are constructed from quality steel and feature a 2" x 2" shank. They are built to complement CURT class 4 trailer hitches and are perfect for towing large boat trailers, RVs, livestock and horse trailers as well as a variety of other farm and industrial-type trailers (NOTE: Never exceed the lowest weight capacity of any towing component; i.e. the vehicle, hitch, trailer, etc). With a few different drop height options and the ability to flip for optional rise, CURT class 4 ball mounts are built to work as hard as you do, from sunup to sundown. This class 4 ball mount has a gross trailer weight capacity of 10,000 lbs. and tongue weight rating of 1,000 lbs. It has a standard drop of 2" or can be flipped to provide 1" of rise. It also features a hollow shank, allowing an anti-rattle hitch pin or lock to be used for reduced noise and vibration. As with most of our ball mount line, CURT class 4 ball mounts are CNC-formed, robotically welded and mechanically descaled to create a flawless product. We finish our heavy-duty ball mounts in a gloss black powder coat to give them superior rust, chip and UV resistance. They also come with a 1-1/4" ball hole to accept a trailer ball with a 1-1/4" shank.

  • Fits trailer hitches with a 2" x 2" receiver tube opening
  • Equipped with a 1-1/4" hole to accept a trailer ball shank
  • 2" drop or 1" rise for precise trailer leveling
  • Hollow shank weighs less and can be used with an anti-rattle hitch pin
  • CNC-formed, robotically welded and mechanically descaled for a perfect fit
  • Protected by a durable powder coat finish
  • Made in USA
  • Limited lifetime warranty (one-year finish, one-year parts)
 

Part 2: 5/8" Hitch Pin (Part #21500)

When you mount a ball mount on your trailer hitch, you expect it to stay put. Whatever type of load you are hauling, having towing equipment that can work as hard as you do is a must. For all types of heavy-duty towing, CURT 5/8" hitch pins and clips pack a little extra punch. We make our 5/8" hitch pins out of solid steel and coat them in one of four finish options. All of these finishes offer excellent resistance to rust and corrosion for long-lasting, smooth operation. CURT hitch pins are also constructed with a 105-degree bend, creating a useful handle for a better grip and allowing the pin to stay securely engaged in the trailer hitch and ball mount. This particular 5/8" hitch pin features a zinc finish and comes with a standard retainer hole to accept the included clip. It provides reliable installation for any ball mount or hitch-mounted accessory with a 2" shank, making it the perfect fit for class 3, 4 and 5 trailer hitches.

  • 5/8" diameter pin fits 2" x 2" receiver tubes
  • Secures ball mounts and other receiver tube inserts
  • Bent handle for an easier grip
  • Protected by a durable zinc-plated finish
  • Limited lifetime warranty (one-year finish, one-year parts)
 

Part 3: 2" Trailer Ball (Part #40090)

Out of the monotony comes one name that rises above all others. CURT trailer balls are designed for strength, ease of use and, ultimately, to get you to your destination without hassle. CURT 2" trailer hitch balls are constructed from quality steel and are made with precision to fit your 2" trailer coupler like a hand in a glove. They are able to tow most standard-duty and heavy-duty trailers such as utility trailers, boat trailers, campers, livestock trailers and recreational vehicle trailers for hauling ATVs, snowmobiles, personal watercraft and more. These tow balls are an excellent extension of your class 3 or class 4 trailer hitch and ball mount, and are the ideal choice for most pickup trucks and SUVs (NOTE: Never exceed the lowest weight capacity of any towing component; i.e. the vehicle, hitch, trailer, etc). This particular 2" trailer ball offers a ball capacity of 10,000 lbs. It features a 1-1/4" shank diameter, a 2-5/8" shank length, 0" of rise and a nickel-chrome finish to protect against rust and scratches. With its fine-threaded shank, this 2" trailer ball also offers an added measure of holding strength and provides smooth installation and torqueing. To give you peace of mind while towing to that next destination, we also carefully test our trailer balls and ensure that each one meets U.S. VESC specifications.

  • Fits 2" couplers and accepts up to 10,000 lbs. GTW
  • Constructed from high-strength, hot-forged steel
  • Protected by a durable chrome-plated finish
  • Zinc-plated hex nut and helical lock washer for secure mounting
  • Features fine threads for superior holding strength
  • Tested for safety to meet U.S. VESC V-5 specifications
  • Limited lifetime warranty (one-year finish, one-year parts)

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