Trailer Balls & Covers
Equalizer 90024200 Equal-i-zer Adjustable Hitch Shank 8" Rise 4" Drop 2" Receiver
What Are Trailer Balls & Covers?
A trailer ball — also called a hitch ball — is the critical coupling point between your tow vehicle and whatever you're hauling, whether that's a boat, camper, utility trailer, or livestock trailer. Mounted to a ball mount on your vehicle's receiver hitch, the trailer ball locks into the trailer's coupler and bears the full tongue weight of your load. Choosing the right size and rated capacity isn't just a matter of convenience — it's a fundamental towing safety requirement.
Trailer ball covers, meanwhile, protect the exposed ball from rust, road grime, and UV damage when you're not actively towing, extending the life of your hardware and keeping grease off clothing and cargo when the hitch area is in use as a step or a leaning post.
Trailer Ball Sizes & Weight Ratings
Trailer balls come in three standard diameters that correspond to specific coupler sizes and towing capacities:
- 1-7/8" — Typically used for lighter loads such as personal watercraft trailers, small utility trailers, and pop-up campers.
- 2" — The most common size, suited for a wide range of boat trailers, travel trailers, and cargo haulers.
- 2-5/16" — Designed for heavier loads including fifth-wheel adapters, large RV trailers, and commercial equipment.
Beyond diameter, always verify that your trailer ball's gross towing weight (GTW) rating matches or exceeds your trailer's loaded weight. Mismatched ratings are a leading cause of towing accidents and equipment failure. Shank diameter and length also matter — a 3/4" shank handles lighter-duty applications, while a 1" shank is standard for higher-capacity setups.
Top Brands in Trailer Balls & Covers
Convert-A-Ball is the standout name in this category, and for good reason. Their patented interchangeable hitch ball system lets you tow numerous trailers with a single shank — simply swap between the included ball sizes without tools. Their products exceed the national SAE-J684-E standard for hitch balls, and they offer options in nickel-plated, chrome, and stainless steel finishes across both 3/4" and 1" shank diameters.
Trimax brings a security-focused approach to the trailer ball category, offering hitch ball locks and covers that double as anti-theft devices — an essential consideration for anyone leaving a trailer parked at a marina, campground, or job site.
Brophy Products is a trusted name in trailer accessories, offering dependable, straightforward hitch balls and covers well-suited to everyday RV and utility towing applications.
Equalizer is known throughout the towing world for their weight distribution and sway control systems, and their trailer ball products reflect the same engineering attention to load management and coupling integrity.
What to Look for When Shopping
When selecting a trailer ball or cover, keep these factors in mind:
- Ball diameter — Must match your trailer coupler exactly. There is no safe "close enough."
- Weight rating — Always match or exceed your trailer's maximum loaded weight.
- Shank size — Confirm shank diameter and thread length fit your ball mount.
- Material & finish — Chrome and nickel resist corrosion in marine and wet environments; stainless steel offers the highest durability for saltwater or heavy-use applications.
- Cover fit — Covers should fit snugly over the ball to keep grease contained and prevent moisture intrusion.
Whether you're launching a boat every weekend, heading out on a cross-country RV adventure, or hauling equipment to a work site, the right trailer ball is the small component that makes safe, reliable towing possible.