CURT 2-5/16" Chrome Trailer Ball — 15,000 lb Capacity, 1-1/4" Shank, Nickel-Chrome Finish

The CURT 2-5/16" chrome trailer ball (model 40030) is a heavy-duty, VESC-tested tow ball rated for up to 15,000 lbs, built for secure trailer coupling on class 5 hitches.

Whether hauling a loaded toy hauler, dump trailer or small yacht, the right trailer ball makes towing safe and worry-free. The CURT 40030 pairs a 2-5/16" ball diameter with a 1-1/4" shank and a nickel-chrome finish, delivering a combination of precise fit, tested strength and corrosion resistance designed for demanding towing use.

What towing capacity and fit should I expect from this ball?

This CURT ball is rated to handle up to 15,000 lbs gross trailer weight when installed on compatible components. The diameter and shank dimensions match common heavy-duty setups so it fits couplers that accept a 2-5/16" ball and ball mounts with a 1-1/4" hole.

• 15,000 lb gross trailer weight rating (verify weakest component in towing system)
• Ball diameter: 2-5/16" for coupler compatibility
• Shank diameter: 1-1/4" and shank length: 2-5/8"
• 0" rise—suitable for level towing when matched with appropriate ball mount

How durable and weather-resistant is the finish?

The ball features a nickel-chrome plating that helps resist rust, dirt and moisture common in towing environments. The finish not only protects the steel beneath but also provides a smooth mating surface for coupler contact.

• Nickel-chrome exterior for corrosion resistance and easy cleaning
• Hot-forged, heat-treated steel core for long-term strength
• Fine threads to maintain secure mounting after proper installation

How do I install this trailer ball correctly?

Installation requires a mounting platform at least 3/8" thick, the included zinc-plated hex nut and helical lock washer, and proper torque to hold the assembly safely. CURT specifies 450 ft-lb of torque; follow vehicle/hitch manufacturer guidance and recheck tightness after initial use.

• Included hardware: hex nut and helical lock washer for secure fastening
• Required platform thickness: minimum 3/8" for safe clamping
• Specified torque: 450 ft-lb—use calibrated tools and confirm after first trip

What should I verify before ordering this ball?

Always confirm the coupler size, ball mount hole diameter, platform thickness and required shank length before purchase. This package contains the trailer ball, nut and lock washer only—other towing components must meet or exceed the rating.

• Check coupler accepts 2-5/16" ball
• Confirm ball mount hole is 1-1/4" diameter
• Ensure platform thickness and shank length suit your setup
• Never exceed the lowest rated component in your towing chain

Who is this for: The CURT 40030 2-5/16" chrome trailer ball is aimed at owners and operators of heavy-duty trailers—farm trailers, dual-axle utility trailers, toy haulers, dump trailers, and larger RVs—who need a proven, VESC-tested coupling rated to 15,000 lbs. If your hitch, vehicle and trailer components match the ball’s specifications and you require a corrosion-resistant, forged-steel tow ball for demanding loads, this CURT model provides the fit and strength expected for professional and serious recreational towing.