CURT 2" Fusion Welded Ball Mount with 1-7/8" Ball — 2" Drop, 5,000 lb Capacity

CURT 45131 Fusion is a factory-welded 2" x 2" ball mount with a permanent 1-7/8" trailer ball rated 5,000 lb GTW and 500 lb tongue weight.

This Fusion ball mount is built to give you a ready-to-tow solution that emphasizes strength and theft-resistance. Unlike removable ball mounts, the trailer ball on this Fusion model is welded to the shank, eliminating the need for separate ball installation and preventing loosening or removal. The unit ships complete with a pin and clip and is finished in a durable gloss black powder coat for long-term corrosion resistance.

How strong and reliable is the CURT 45131 for everyday towing?

The 45131 Fusion mount carries a 5,000 lb gross trailer weight (GTW) rating and a 500 lb tongue weight rating, suitable for many standard trailers. Robotic welding and a consistent finishing process help deliver repeatable durability under normal towing conditions.

• 5,000 lb gross trailer weight capacity
• 500 lb tongue weight rating
• Robotically welded for consistent strength
• Gloss black powder coat for corrosion resistance

Why choose a welded (permanently attached) trailer ball instead of a removable one?

A permanently welded ball removes the need to tighten or periodically check a threaded ball-to-mount interface, and it can’t be stolen or accidentally backed off. The fixed design also reduces potential flex points, offering a more rigid connection between vehicle and trailer.

• Cannot be loosened or removed by thieves
• Fewer mechanical interfaces, less chance of loosening
• Increased rigidity compared to non-welded mounts
• Ready-to-tow out of the package—no extra parts required

Will the CURT 45131 fit my hitch and trailer setup?

This mount is designed for standard 2" x 2" receiver openings and accepts trailers with a 1-7/8" coupler. It provides a 2" drop and a total shank length of 7-1/2", helpful for achieving a level trailer stance on many vehicles and trailers.

• Fits 2" x 2" receiver tubes
• 1-7/8" welded ball size for matching couplers
• 2" drop and 7-1/2" overall length for common leveling needs
• Includes pin and clip for immediate installation

How does the hollow shank and finish affect performance?

The hollow shank reduces overall weight while preserving strength and allows compatibility with anti-rattle accessories. The powder coat finish is applied after thorough cleaning, improving chip and rust resistance for longer service life in outdoor environments.

• Hollow shank lowers weight and allows anti-rattle kits
• Precision cuts and welds minimize fitment issues
• Powder coat resists corrosion and chipping
• Finished unit arrives ready to tow with included hardware

Who this is for: The CURT 45131 Fusion 2" ball mount is aimed at drivers who tow small to medium trailers—utility trailers, small boat trailers, campers and livestock trailers—who prefer a low-maintenance, theft-resistant towing solution. It’s a good match when your vehicle and hitch tongue ratings meet or exceed the mount’s capacities and when a 1-7/8" coupler and 2" receiver are required. Always ensure the lowest-rated component in your tow chain determines your safe towing limits.