Class I and Class II trailer hitches both have a 1-1/4 inch receiver. That is where the similarities end though. Class I hitches are rated for less weight, typically maxing out at 2,000 pounds gross trailer weight and 200 pounds tongue weight.
Class II hitches on the other hand can be rated as high as 3,500 pounds gross trailer weight and 350 pounds tongue weight.
Most Class I hitches also have a stop punched into the receiver tube, see picture, that prevents the use of Class II accessories.... view full answer...
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