So when you go to look at buying old used trailers from people... how do you know which size of ball for what size hitch they have on it? And how do you make sure you are compatible? (And can you cross size?) I've not had to do this before so I thought to ask for advice on this. Partly also; when you go buy 2 x 4 pieces at the lumber store, you find out they aren't actually 2 inches by 4 inches... and knowing that worried me a bit in making sure I knew what to do and not just go off without any pre information.
Thanks.
Thanks.