For these specialized hitches, the pin diameter remains at 5/8”, but pay extra attention to the usable pin length.Īgain, the larger the receiver, the longer the pin needs to be. Some class 5s have a 2” receiver, but others have a 2-1/2” or even 3” receiver. Where things get tricky is with heavier-duty class 5 hitches. If the inside width of the receiver is 1-1/4”, and the metal walls are nearly 1/4” thick, and there needs to be some margin for proper spacing, the minimum usable length is 2”.įor class 3, 4 and most class 5 hitches, it’s the same story, only their required pin diameter is 5/8” and their minimum usable length is 3”. Remember, the pin has to pass all the way through the receiver to actually be safe and effective, and allow the hitch clip to be applied. This is because the receiver tubes on class 1s and 2s are always 1-1/4” x 1-1/4”. Class 1 and 2 hitches – like those you might find on a car or minivan – all use a 1/2” diameter pin with at least 2” of minimum usable pin length.
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