CURT Class 4 Ball Mount #45311


SKU: 612314453115 Category:


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 4″ or can be flipped to provide 2 3/4″ of rise. It also features a hollow shank, allowing an anti-rattle hitch pin or lock to be used for reduced noise and vibrartion. 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 1 1/4″ ball hole to accept a trailer ball with a 1 1/4″ shank.


Shipping Weight: 8.350
Rise: 2 3/4 IN
Tongue Weight(TW): 1,000 LB
Product Weight: 0.000
Gross Trailer Weight(GTW): 10,000 LB
Ball Hole: 1 1/4 IN
Finish: Gloss Black Powder Coat
Drop: 4 IN
Receiver Tube Size: 2
Warranty: Limited Lifetime
Material: Steel
Color: Black


  • Fits trailer hitches with a 2" x 2" receiver tube opening
  • Equipped with a 1 1/4" hole to accept a trailer ball shank
  • 4" drop or 2 3/4" 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