Thanks for pointing that out. The 8900 lb number I had stuck in my head is for total Sienna and trailer
weight, GCWR. The door sticker says 5995 lbs GVWR, leaving ~1600 lbs for people and payload.
The Sienna manual leaves some flexibility for the driver to sort out how to simultaneously not exceed the GCWR, GVWR, and GAWR, pg. 212, and how to choose the hitch
weight, pg 215.
This hitch is supposedly the one that doesn't hang down...
Something I noticed shopping for
tires (we will carry a real spare and get away from the OEM run-flats) is that the Nokians have a load rating of 104, compared to 100 for the Michelins, Continentals, and etc. I put Nokians on a Civic a few years back and they were great
tires.