Chlirod
Several years ago I attempted to find out the same answers with my 23 foot Weekend Warrior. My tongue weight was about 1650. With dual axles not centered front to rear, the ratio is no where near one to one. Placing weight at the back of a dual axle set up allows a majority of the weight to continue pressing down on the axles, it does not create an even "down in back, up in front" transfer. This would only happen with a single axle set up in the middle of the trailer. The more overhang you have behind the rear wheels will allow for more weight transfer, however most toy haulers have limited rear overhang.
I was able to use portable scales on my old rig and, for me, the transfer effect was about 10 to 1. (For every 10 pounds placed at the back, the tongue weight lessened by about one pound) The remaining 90% went straight down on the tires. All attempts by me to lessen the tongue weight were not worth the effort. (except going to a fifth wheel!)
I hope this helps
Best regards
Bill
