Question: are there different size tow balls?
Answer: Yes, there are four different size tow balls commonly used for towing: 1-7/8-inch, 2-inch, 2-5/16-inch and 3-inch diameter. One size will not fit all trailers. 1-7/8-inch tow balls are rated as high as 3,500 pounds and are used for towing small, light-duty trailers.