peirek wrote:
Old-Biscuit wrote:
My front tire psi doesn't change because front axle weight doesn't change whether towing or not
Clearly not true when using a WD hitch. Unless of course you are towing an extremely light TT with a really big TV. The hitch weight should be distributed to all axles (TV and TT) Take it to the scales for proof.
All the weight distributing hitch does is replace weight lost from the front axle after hooking up the trailer. It does not typically load significantly more weight onto the front axle than was there when the trailer was unhooked, unless the hitch is overadjusted for the tongue weight.
In a utopian setup, the front axle weight would remain the same, between trailer unhooked, and trailer hooked up, with spring bars connected.
Even an overadjusted hitch isn't going to place more than 300 lbs onto the front axle, than was there before the trailer was hooked up. A 300 lb weight increase per axle (150 lbs per tire) is insignificant, as far as normal working tire pressure is concerned.