CURT 2-5/16" Chrome Trailer Hitch Ball — 20,000 lb Capacity, 1-1/4" x 2-3/4" Shank, Nickel-Chrome Finish

CURT 40009 is a heavy-duty 2-5/16-inch chrome trailer hitch ball built to tow up to 20,000 pounds with a 1-1/4" x 2-3/4" shank for secure mounting.

This rugged tow ball is engineered for demanding hauling tasks where strength, fit, and corrosion resistance matter. Designed to pair with Class 5 hitches and ball mounts, the CURT 2-5/16" ball balances raw load capacity with a precision shank size and protective chrome finish. It’s tested to meet U.S. VESC standards for consistency under load and includes hardware to lock the ball in place.

What towing capacity does this CURT hitch ball support?

The CURT 40009 is rated for up to 20,000 pounds gross trailer weight, making it suitable for heavy trailers used in commercial, agricultural, and recreational hauling. Always confirm the lowest rated component in your towing setup—vehicle, hitch, mount, or ball—and never exceed that limit.

• Gross trailer weight capacity: 20,000 lb
• Intended for Class 5 hitches and mounts
• Matches common heavy-duty trailers like dump, utility, and toy haulers

How does the shank and diameter ensure a reliable fit?

This ball has a 2-5/16" diameter to seat firmly inside compatible couplers, while the shank measures 1-1/4" in diameter and 2-3/4" long for a stable, threaded attachment. The fine threads and included hardware are designed for a tight, vibration-resistant installation when torqued to specification.

• Ball diameter: 2-5/16" to match standard couplers
• Shank: 1-1/4" diameter, 2-3/4" length for secure mounting
• Includes zinc-plated hex nut and helical lock washer for lock-in stability

What materials and finishes protect the ball from wear and corrosion?

The CURT 40009 is hot-forged from steel to deliver the toughness needed under heavy loads, then plated with a nickel-chrome finish to resist rust and environmental wear. The plating simplifies cleaning and reduces surface corrosion that can compromise fit or longevity.

• Hot-forged steel core for high tensile strength
• Nickel-chrome plating for corrosion resistance and easy maintenance
• Designed to withstand road exposure and routine use

What safety features and testing back up performance?

CURT tow balls undergo testing to U.S. VESC specifications to verify performance under expected towing loads. The hardware and thread design are specified to be torqued to the required 450 lb.-ft. to ensure the assembly holds reliably during operation.

• Tested to U.S. VESC standards for consistent loading behavior
• Fine-thread shank for increased clamping force when torqued
• Specified torque: 450 lb.-ft. for proper installation security

Who is this for? The CURT 40009 is aimed at owners of heavy trailers, commercial operators, farmers, and RV users who need a robust 2-5/16" hitch ball with high load capacity and a corrosion-resistant finish. If your vehicle and hitch are rated for Class 5 towing and you require dependable hardware for frequent or heavy hauling, this ball delivers the strength and mounting reliability expected from professional-grade towing gear.