If you are positive you will never upgrade to a bigger heavier unit you can get the 16k hitch. If you have a possibility of upgrading I would go bigger. My unit is 16k gross weight. I have a very high quaility Reese 20k hitch. Because it will not work with my new trucks puck system with out an adapter bra kit I bought a RBW 25 k companion. I did this because I know my truck ratings could support a bigger unit and I have had those crazy irrational thoughts of upgrading.
Oops reread the post and you are talking about pin box.
Tom Marty
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