CURT 40085 Raw Steel Trailer Hitch Ball - 30,000 lbs, 2-5/16-inch Diameter, 1-1/4 x 2-5/8-inch Shank

Built for heavy-duty towing

The CURT 40085 Raw Steel Trailer Ball is a solid piece of towing gear designed to handle demanding trailers while delivering dependable performance on the road. Its raw steel construction and thoughtful engineering provide a tangible sense of strength you can feel when you hitch up for the day.

Why this trailer ball stands out

With a rated capacity of up to 30,000 pounds gross trailer weight, this ball is designed to work in tandem with class 5 hitches and ball mounts. The hot-forged steel core delivers peak towing strength where it matters most, while the raw steel finish helps resist the elements so you’re ready for weather exposure on extended trips.

• High-strength construction: hot-forged steel for maximum towing strength
• Wear resistance: heat-treated raw steel for long-term durability
• Precise fit: 2-5/16-inch ball diameter with a 1-1/4-inch shank and 2-5/8-inch shank length
• Secure install: includes a zinc-plated hex nut and a helical lock washer; fine threads for a firm hold
• Safety tested: meets U.S. VESC specifications to promote reliable towing

Rigorous design with practical use in mind

Whether you’re towing a dump trailer, toy hauler, farm trailer, chopper box, dual-axle utility trailer, deluxe RV, or a small yacht, this 2-5/16" ball pairs with the right hitch ball mount to handle real-world loads. The 30,000-pound capacity is a value you’ll notice when planning trips with heavy gear in tow.

• Compatibility: fits virtually any 2-5/16-inch coupler for broad versatility
• Component strength: pair with a class 5 hitch and robust ball mount for confident towing
• Weather-ready: raw steel finish helps resist moisture and corrosion while remaining serviceable

What you get and installation notes

The CURT ball ships with a hex nut and lock washer for a secure installation. The design uses fine threads and requires up to 450 lb-ft torque for a tight, reliable mounting. Always reference the vehicle and hitch component ratings, and never exceed the lowest rated component.

Real-world scenarios

From hauling equipment on rugged work sites to towing large toy haulers on weekend adventures, this trailer ball offers a balance of endurance and practicality. It’s designed to be a capable choice when a standard ball might fall short of the task at hand.