CURT Class 2 Trailer Ball Mount for 1-1/4-Inch Receiver, 1" Drop / 3/8" Rise, 3,500 lb GTW

CURT 45503 is a Class 2 trailer ball mount engineered for light-duty towing, fitting 1-1/4-inch receivers with a 3/4-inch ball hole and rated to tow up to 3,500 lbs gross trailer weight.

This precision-manufactured ball mount is built from high-strength steel using CNC machining and robotic welding to deliver consistent fit and dependable performance for everyday towing. Its 1-1/4" x 1-1/4" shank fits industry-standard 1-1/4" receivers, and the part is finished in a durable black powder coat to resist corrosion, chips, and abrasion from road use.

How does this ball mount handle common towing tasks?

The CURT 45503 is tailored to light- and standard-duty towing—think small boat trailers, utility trailers, pop-up campers, and cargo trailers for ATVs or motorcycles. With a gross trailer weight (GTW) rating of 3,500 lbs and a tongue weight (TW) capacity of 350 lbs, it is balanced for many day-to-day towing scenarios when used with compatible vehicle and hitch components.

• 3,500 lb gross trailer weight and 350 lb tongue weight capacities.
• Fits common loads such as small boats, utility trailers, and light RV trailers.
• Works only within the lowest-rated towing component’s limit—vehicle or hitch may have lower ratings.

What receiver and hitch ball sizes does this mount require?

This ball mount accepts a 1-1/4" x 1-1/4" shank receiver, the industry standard for Class 2 hitches. The mount features a 3/4" diameter hole to accept a trailer ball with a 3/4" shank (trailer ball and hitch pin are sold separately).

• Shank: 1-1/4" x 1-1/4" — fits Class 2 receivers.
• Ball hole: 3/4" diameter for common trailer balls.
• Hardware: requires a hitch pin or locking pin (not included).

How does the rise and drop affect towing alignment?

The CURT 45503 provides a 1" drop and a 3/8" rise, designed to help achieve a level trailer stance for many vehicle/trailer combinations. Choosing the correct orientation (drop versus rise) helps keep trailer tongue weight and trailer angle within safe towing ranges.

• 1" drop useful for vehicles with lower hitches or when trailer tongue is slightly higher.
• 3/8" rise offers minor lift when the trailer tongue sits lower than the vehicle hitch.
• 7-13/16" overall length gives separation between receiver and trailer coupler.

How durable is the finish and how easy is installation?

CURT coats this ball mount with a robust black powder coat that resists rust, UV fading, chipping, and common road abrasions to extend service life. Installation is straightforward: slide the rounded shank into a 1-1/4" receiver and secure it with a hitch pin or locking device (sold separately).

• Black powder coat for corrosion and scratch resistance.
• Rounded shank eases insertion into the receiver tube.
• Simple install: insert shank, align pinhole, and secure with hitch pin.

Who is this for: The CURT 45503 ball mount is aimed at drivers of full-size sedans, minivans, crossover SUVs, and light trucks equipped with a Class 2 (1-1/4") hitch who tow light loads—small boats, utility trailers, pop-up campers, and recreational trailers. It’s a practical, durable choice for weekend haulers and occasional tow users who need reliable fit, corrosion protection, and predictable towing geometry without upsizing to heavier hitch classes.