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Curt Class II Ball Mount (Fits 1 1/4") 45510

Product Information
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Our Price:
Part #:
Class II Black | Fits 1 1/4" Receiver | Uses Ball w/ 3/4" Shank
Rise: 3-1/8" | Length: 10-5/16" | 3,500 lbs. Towing / 300 lbs. Tongue


  • Fits 1-1/4", 2" & 2.5" receiver hitches
  • Classes available include I, II, III, IV, V.
  • Constructed from 2 piece or Magnum 1 piece design
  • Choose from multiple available finishes
  • Made from durable quality materials
  • Featuring various lengths

Whether you've just bought a new camper for summer activities or you just need to tow a trailer for other uses, we've got you covered with our huge selection of Curt ball mounts! Curt is on top of their game and offer many towing products which make your life easier.

Curt ball mounts are CNC machined out of the toughest steel on the market. There is no doubt that Curt makes high quality products. They offer 2 piece ball mounts which are seamlessly welded for maximum durability as well as a one piece that has been forged out of one piece of steel. The one piece of steel construction is also known as Magnum. Can you imagine the towing possibilities with a Magnum ball mount? These rugged ball mounts are made to last and offer different finishes. Most have a black finish, but with the class III selection you can choose from multiple colors.

These ball mounts are offered in many different sizes and will fall into many different classes. Curt ball mounts classes include I, II, III, IV, V fitting on 1-1/4" X 1-1/4", 2" X 2" & 2.5" receiver hitches.

Class I & II ball mounts will fit onto 1-1/4" X 1-1/4" receivers with up to a 3,500 LB. gross towing weight & up to a 300 LB. tongue weight. These light duty ball mounts are featured in lengths from 6-3/4" to 10-5/16" and are finished with a thick layer of black powder coat.

The next level would be a class III. These fit 2" X 2" receiver hitches and have a gross towing weight up to 6,000 Lbs. with a tongue weight up to 600 Lbs. They vary in lengths, everything from 8-1/4" to 12-1/4" and have 2", 4", 6", or 10" drops. The ball mounts are available in an array of different finishes including black, bright red, dark red, bright white, bright blue, dark blue, dark green, charcoal gray as well as chrome. These tough ball mounts allow you to match the color scheme when towing heavy duty loads.

Last but not least we present to you the Curt Class IV & V. These extra tough ball mounts are available in a 2 piece design as well as the Magnum style, ensuring amazing durability and strength. They are made to fit 2" or 2.5" receiver tubes and have a gross towing weight of up to 18,000 Lbs. with a tongue weight up to 1,800 Lbs. There is only 1 length of 8-1/4" with 2", 4", 6" drops. Black powder coat is what these ball mounts are finished in.

If you're in the towing business or you just need a ball mount for your trailer, you've come to the right place! We carry a huge array of Curt ball mounts, ensuring you get exactly what you came looking for.

View Available Part Numbers For This Product Line


The ball mount is placed inside the hitch opening which is mounted to the vehicle. Be sure to check your ball mount before towing to make sure a hitch pin is placed through the hole of the ball mount. The hitch pin secures the ball mount inside the tube of the receiver hitch when towing.

Style Type #1 Ball mount: This style of ball mount is needed when the trailer and vehicle are equally level.
Style Type #2 Ball mount: This style of ball mount is needed when your trailer and vehicle are NOT equally level.
How do I determine what size drop or rise I need for my ball mount?
To determine the size drop or rise for your style type #2 ball mount: (style type #1 is only for equal level vehicle and trailer) First level your trailer and measure from the ground up to the top ID. of receiver tube opening. Second, measure your vehicle from the ground up to the bottom of the trailer coupler. Third take the difference from both measurements and this will determine the size of drop or rise you need.


Limited Lifetime Warranty

CURT Manufacturing Incorporated warrants, to the original purchaser, its products to be free from defect workmanship under normal use and service, ordinary wear and tear accepted for as long as product is owned by the original purchaser.
Limitations of the Warranty
CURT Manufacturing Incorporated's obligation under this warranty is limited to repair or replacement, at its option. CURT Manufacturing Incorporated shall not be liable for the loss of or use of vehicles, cost of removal and /or installation, loss of time, inconvenience, rental of vehicles, loss or damage to personal property, expenses such as telephone, lodging, gasoline, towing, or any incidental or consequential damages. CURT Manufacturing Incorporated will examine the returned product. If the defect is covered under the warranty, CURT Manufacturing will repair the item or replace it at that time. Alterations or misuse of the items will not be covered under the warranty.   Some states do not allow the exclusion or limitation of incidental or consequential damages. So the above limitation or exclusion may not apply to you.
This warranty gives you specific legal rights and you may also have other rights, which vary, from state to state.
PDF Icon Curt MFG Warranty


The Curt ball mounts are featuring an easy installation.  There is an installation manual that is sent with these hitches, offering clear cut and easy to read instructions. For additional information please call us at 1-877-216-5446 or 701-253-5906.