Curt MFG Trailer Hitch Balls
Curt MFG Trailer Hitch Balls Getting out on the road with confidence means equipping yourself with the tools you need to tow safely and comfortably. Regardless of your destination, CURT carries a wide variety of trailer balls to keep up with your vehicle, trailer and lifestyle.
CURT trailer balls are built to the highest quality standards for consistency, accuracy, strength and fit. We offer all standard diameters, including 1 7/8”, 2”, 2 5/16” and even 3”. All CURT trailer balls are thoroughly tested to meet U.S. VESC specifications for safety, and they are available in three different finish options, including stainless steel, nickel-chrome and raw steel.
Selecting a Trailer Ball
There are many factors that go into determining the correct trailer ball for your ball mount, vehicle and trailer. There is no single trailer ball size that fits every application. A trailer ball must be strong enough for the load you are towing, and it must fit your specific towing setup. When selecting a trailer ball, you must consider platform thickness, hole size, coupler size and weight rating.
Measuring a Trailer Ball
The ball mount platform is the tab or tongue on a ball mount that the trailer ball mounts onto, using the threaded shank and nut. As a rule, the mounting platform on the ball mount must be at least 3/8” thick in order to be deemed safe for towing.
A trailer ball is mounted onto a ball mount by sliding the shank into the hole in the ball mount platform. The shank diameter must always match the diameter of the platform hole. The hole cannot be more than 1/16” larger than the diameter of the threaded shank or the trailer will not tow properly. For larger holes, a reducer sleeve may be used to accommodate a smaller trailer ball shank.
The coupler is the front-most portion of the trailer that rests on the trailer ball. It is imperative that you know your coupler size before purchasing a trailer ball because the size of the trailer ball must match the size of the coupler. Without a proper fit, it is not safe to tow. Trailer couplers are not all the same size. The coupler size will typically be stamped right on the coupler itself.
Different trailer balls are designed to handle different amounts of weight. In general, a trailer ball with a larger ball diameter will be able to handle more weight than one with a smaller ball diameter. When deciding which trailer ball will best serve your needs, it is important to know how much weight you will be towing. The trailer ball must be capable of towing the gross trailer weight. Trailer balls with a 1 7/8” diameter range in capacity from 2,000 to 3,500 lbs. 2” diameter trailer balls range from 3,500 to 10,000 lbs. 2 5/16” trailer balls can be anywhere from 6,000 to 30,000 lbs., and 3” diameter trailer balls max out 30,000 lbs. Check for a weight rating on the specific trailer ball you choose before making a purchase.
An important part of towing safety is making sure your trailer ball is securely mounted to your ball mount. Unless you purchase a ball mount with a fixed trailer ball, such as on a Euro Mount™ or fusion ball mount, the trailer ball needs to be tightened to a certain torque specification in order to prevent the nut from vibrating loose.
For each trailer ball shank diameter, a different torque spec is required. The diagram provides a list of trailer ball torque specs based on shank diameter. When installing or switching between trailer balls, use a torque wrench to administer the proper amount of torque on the nut.
More than likely, you own more than one trailer. Just because you can tow your boat trailer, utility trailer and popup camper with the same vehicle does not mean they all fit onto the same trailer ball. It can be a hassle to switch back and forth between ball mounts to accommodate multiple trailers. For this common problem, CURT offers the Switch Ball™ trailer ball.
Made with premium grade, nickel-chrome-plated steel, the CURT Switch Ball™ is a trailer ball shank that accepts different size trailer balls with a simple twist-on action. The exclusive J-groove design of the Switch Ball™ ensures a secure system without the need for tools or pins. The weight of the trailer rests on the shank, taking stress away from the ball and freeing the coupler from friction and binding.
Switch Ball™ trailer balls have a weight capacity from 3,500 up to 8,000 lbs., depending on the ball diameter, and they are incredibly useful for changing between couplers on small to mid-size trailers.
1 7/8″ TRAILER BALLS
CURT 1-7/8″ trailer balls are ideal for light-duty towing applications and smaller vehicles, such as passenger cars, minivans and crossovers. We offer these hitch balls in a stainless steel or chrome finish, and many are rated up to 3,500 lbs.
2″ TRAILER BALLS
CURT 2″ trailer balls are versatile and reliable. They are available in stainless steel or a chrome finish, and range in weight capacity from 3,500 lbs. up to 12,000 lbs. 2″ trailer balls are used on everything from vans and SUVs to full-size trucks.
2 5/16″ TRAILER BALLS
CURT 2-5/16″ trailer balls are built for heavy-duty towing applications and are typically used on full-size trucks and SUVs. We offer three finish options, including stainless steel, chrome and raw steel. 2-5/16″ trailer balls range in capacity from 6,000 up to 30,000 lbs.
3″ TRAILER BALLS
CURT 3″ trailer balls are commonly used for gooseneck towing applications, being bolted or welded onto a gooseneck hitch. They are constructed from raw, heat-treated steel for superior strength and durability, and they are rated up to 30,000 lbs.
SPECIALIZED TRAILER BALLS
CURT specialized trailer balls are designed for specialized towing applications. We offer a number of replacement gooseneck balls and pintle balls. We also have a sway control replacement ball for our sway control unit or our sway control ball mount.
CURT Switch Balls™ make it easy to change between trailer ball sizes without any tools or torqueing required. The Switch Ball™ shank features a patented J-groove design that allows various trailer ball heads to be installed and switched out as needed.