I actually pulled the 20% out of my, ah, well ear? trying to quantify a derating measurement to account for calculation errors, not overburdoning the TV and a margin of safety. The advertised dry weight and tounge weight of the TT doesn't account for anything added.
The sticky should have caution and warnings in regards to tounge weight and how you pack your TT. Any weight added forward of the axles that is not countered by added weight aft of axles will add to the tounge weight. You can start with the 100# for propane and battery. This was apparent with my last TT. The bedroom was up front. It had a large under bed storage area where we stored heavy items such as cases of sodas and bottled water and can food, all cloths went in the wardrobe located all the way forward, the only outside storage was all the way forward, floor jack, tool box, 4-way tire wrench, grease gun, power cable and hose, several wooden blocks. All located forward while adding nothing aft of the axles. All this threw the advertised tounge weight out the window.
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2011 Outback 277RL
2011 Ford F150 EB Max Tow
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