Rhino Hitch guide
Trailer Hitch Ball Sizes Explained
Updated 2026-10-20 · Rhino Hitch Inc · Facts checked 2026-10-20
Quick answer
Use the ball size stamped on your trailer coupler. Common sizes are 1-7/8", 2", 2-5/16" and 3". Rhino Hitch hitch listings include a 2" and 2-5/16" ball, and Convert-A-Ball sets are also sold with a 1-7/8" ball.
A ball that's too small for the coupler can pop off. One that's too big won't latch. Always match the coupler.
Find your size
Look on the top or side of the trailer coupler. Most are stamped with the ball size and a rating.
Common ball sizes
| Ball size | Typically used for |
|---|---|
| 1-7/8" | Small utility and light trailers |
| 2" | Many mid-size utility, boat and camping trailers |
| 2-5/16" | Heavier equipment, car haulers and larger trailers |
| 3" | Some very heavy trailers |
These are common uses, not rules. Your coupler stamp is what counts.
Ball rating
Every ball carries its own rating, usually stamped on the ball. Your setup is limited by the lowest rating among the vehicle, receiver, hitch, ball and coupler.
Balls with Rhino Hitch
- Each adjustable hitch listing includes a 2" and 2-5/16" ball set.
- Convert-A-Ball sets come in 2-ball large (2" and 2-5/16"), 2-ball small (1-7/8" and 2") and 3-ball (1-7/8", 2" and 2-5/16") versions, each with a shank, shank cover and carrying case.
- Single stainless steel Convert-A-Ball balls are listed for the 12,000, 14,000 and 16,000 lb hitches only.
Questions
Frequently asked questions
Can I use a 2" ball on a 2-5/16" coupler?
No. Always use the ball size stamped on the coupler.
What are the included Rhino Hitch balls rated for?
Rhino Hitch hasn't published ball ratings yet. Check the stamp on the ball before towing.
Put it to work
