CURT Switch Ball 1 in. Shank Trailer Ball Set — 1-7/8" & 2" Quick-Change, Nickel-Chrome

CURT's Switch Ball system replaces the need for multiple ball mounts by pairing a single heavy-duty shank with removable heads that lock into a J-groove. Built from high-strength steel with a bright nickel-chrome finish and SAE J684 independent testing, this packaged set gives you two commonly used ball diameters and rated capacities so you can tow different trailers with the same hitch setup.

How does the Switch Ball make changing ball sizes faster?

Switch Balls use an engineered J-groove that secures the ball head to the shank while allowing quick removal with a simple twist and lift. There’s no pin, wrench, or special tool required—just rotate the ball head and lift it off. The design keeps the connection tight under load yet user-friendly when you need a different diameter.

• Tool-free twist-and-lift removal and installation
• J-groove locks heads solidly to prevent slippage
• Single shank supports multiple ball sizes for faster changes

What towing capacities and ball sizes are included in this set?

The 42178 kit includes two ball heads: a 1-7/8" ball rated at 3,500 lbs and a 2" ball rated at 6,000 lbs, covering common light- and medium-duty towing needs. The interchangeable heads let you match the coupler size to the correct ball diameter and rated capacity for safer towing. Always choose the ball that meets or exceeds your trailer's gross trailer weight rating.

• 1-7/8" diameter ball — 3,500 lb capacity
• 2" diameter ball — 6,000 lb capacity
• Shank: 1" diameter, 2-1/4" length for standard mounts

Is the Switch Ball durable and corrosion resistant?

CURT manufactures the shank and ball heads from high-strength steel and applies a bright nickel-chrome finish to resist wear and corrosion. The finish improves longevity in road conditions and the robust steel shank supports the load, preventing coupler friction and binding. Independent SAE J684 testing adds an extra layer of quality verification.

• High-strength steel construction for structural durability
• Nickel-chrome plated finish for corrosion resistance
• SAE J684 tested to industry standards

Will this kit fit my existing hitch and trailers?

The 1" diameter, 2-1/4" shank is compatible with most standard 1" hitch ball mounts; confirm your mount’s shank hole and available shank length to ensure proper fit. The included ball sizes match common couplers—1-7/8" and 2"—so they cover a wide range of small utility trailers, boat trailers, and light campers. For safety, always verify your vehicle, hitch, and trailer ratings before towing.

• Shank fits standard 1" ball-mount holes
• Includes 1-7/8" and 2" balls to match common couplers
• Check hitch and vehicle ratings to match trailer GTW

Who is this for? The CURT 42178 Switch Ball set is ideal for drivers who tow multiple small-to-medium trailers and want a faster, neater way to match coupler sizes without extra ball mounts. It suits weekend boaters, landscapers, and recreational trailer users who value tool-free operation, durable materials, and the ability to switch between 3,500 lb and 6,000 lb ball capacities quickly. If you need flexibility, a compact toolkit solution, and industry-tested hardware, this CURT set is designed for you.