Reese makes the parts I was originally going to user, unfortunately the local shop does not have them in stock.

However, they do have equivalents from Draw-Tite. Solid stainless steel "stinger" rated for 12K, 2 5/16" ball rated for 10 or 12K. I originally ordered a 4" drop, but I think that may be too much. I'll see if I can get a 2" version. I didn't know about the 18" rule of thumb, that will be handy.

Mine is a Load Master trailer and they set up on 21''.check with the man.of the trailer if in question.

http://www.ultrahitch.com/perfect_drop_bar.html
http://www.ultrahitch.com/rapidhitch.html
http://www.clever.ws/hitch.htm

Go to
http://www.draw-tite.com/

Click on Forged Ball Mount
Then Click on Hitch Balls

They have the size you need.

Go to a Trailer/Camper place they will have stuff like this in stock.

Buy the solid square receiver. Those hollow ones I think aren't rated high enough for you.

dockrocker, read through the thread sidwayz just posted it has a lot of good info, in order to pull 10k legally you would need a weight distributing setup. I just went and checked mine it's a class V hitch rated for 15k but if you don't have the weight distribution setup (and I don't) it's only rated for 6k weight carrying .

That depends on the size of the rims and tires. Mine is level at about 21" as well. They are making some really cool adjustable receiver/ball setups these days out of billet.

Mike,
When are you going to get the boat ? Mine may be available to use, 2 5/16 ball and slide in receiver.

ed