Trailer Ball Size Guide (Canada)
Towing
Trailer ball size is a coupler match, not a hitch class. Measure the coupler opening, pick one and seven eighths, two inch, or two and five sixteenths, then confirm the ball shank, nut, and rating still sit under the mount and hitch.
We stock CURT hitch balls in the everyday diameters, with free shipping anywhere in Canada.
Pair with the
ball mount guide
and
drop measuring tips.
Hub:
towing guides.
The three everyday diameters
| Ball diameter | Typical coupler | Notes |
|---|---|---|
| One and seven eighths inch | Light utility and small boat trailers | Common on lighter GVWR trailers. Confirm the coupler stamp. |
| Two inch | Most utility, boat, and mid-size travel trailers | The default size when the coupler says two inch. |
| Two and five sixteenths inch | Heavier gooseneck-style and large travel trailers that use that coupler | Do not force a smaller ball into a larger coupler. |
Read the stamp on the coupler latch or body. Guessing from trailer type alone is how mismatched balls get ordered.
Ball, mount, and hitch are three ratings
The hitch ball has its own gross trailer and tongue numbers. So does the ball mount. So does the receiver. The lowest number wins. A heavy Class 4 hitch with a light-duty ball is limited by the ball. Match shank diameter to the hole in the mount, torque the nut to the product spec, and recheck after the first loaded trip.
Canadian winters corrode chrome and threads. Wipe the ball, keep a dab of appropriate grease on the coupler if the trailer maker allows it, and replace a ball that is worn flat or cracked.
Parts we commonly sell
Confirm ratings and fit notes on each product page before you order.
CURT part 40015One and seven eighths Trailer Ball 3Confirm fit and rating on the product page.$25.07 CAD
CURT part 40016One and seven eighths Trailer Ball 3Confirm fit and rating on the product page.$29.66 CAD
CURT part 40017One and seven eighths Trailer Ball 1Confirm fit and rating on the product page.$35.67 CAD
CURT part 40003Hitch Ball Two inchConfirm fit and rating on the product page.$26.20 CAD
CURT part 40004Hitch Ball Two inchConfirm fit and rating on the product page.$26.63 CAD
CURT part 40018Hitch Ball Two inchConfirm fit and rating on the product page.$19.58 CAD
Official CURT context
Official clips from @curtmfg. If an embed stalls, use the YouTube link under the video.
How to Select a Trailer Hitch
Classes, receiver sizes, and matching hitch ratings to the trailer.
Watch on YouTube
