[tentcamper]

The post about a 1200 WDH for a 400 lb tongue. 1,200 is the tongue weight rating of that WDH. I know over the years that I have read with WDH if the rating of the bars is over rated for the application you can have more problem than not using a WDH. So I would not use 1200 lb bars with a 400 lb tongue load. The spring bars will not work right with such a small load. I have seen by reese, light tongue weights 350, 400 and 600 lbs wdh. So there are hitchs made for light tongue weights.

I not sure about a highlander, but my Toyota sienna lists in the manual (unibody). The manufacture rises the tongue weight capacity from 350 to 525 with the use of WDH. I don't think toyota would have rated it if they had a concern with the uniboady.

We just pick up a reese 600 WDH hich. Before ordering it I check with reese to make sure that it was sized correctly. They told me the hitch was good for tongue weights between 200 to 600 LBS. I would assume that a 1200 WDH is good for tongue weights between 800 and 1,200 lbs

I would check the manual for WDH information and only use a WDH that rated for the right application.