Hitch n Ball Question

I am curious to know wether or not a US Ball hitch will directly fit the European one since there is a few mm in between them.
Would it be safe to directly hitch to a car or not or must somthing be done?
50 millimeters = 1.96850394 inches. Is it too much of a gap?
Classic Finn
Would it be safe to directly hitch to a car or not or must somthing be done?
50 millimeters = 1.96850394 inches. Is it too much of a gap?
Classic Finn
