Tyre pressures when towing

[Wayfarer]

Hi looking for a bit of guidance on tyre pressures when towing a caravan, nose weight around 80 to 90kg. And typically an 1900kg caravan.
Car is an f15 40d Msport with 21 inch wheels, currently use fully loaded tyre pressures as shown on door panel for the tyre wheel combination when towing

The car generally has two adults and one 40kg dog) towing or solo) and I then reduce the tyre pressures to the part loaded pressures on the door panel.

However just want to see what other owners do as it's a lot of hassle to inflate and deflate the tyres Reset the tpms everytime you stop or start towing.

Thanks in cadiz ce

[gmc15]

I leave the tyre pressures set for part load and don't change them for towing or solo. My van is 2000kg and I run a nose weight of about 140kg. Never had any problems. It's a lot of chew to inflate and deflate the tyres when towing or solo. We are 2 adults and a 25kg dog most of the time.

[Jayx5]

I leave mine at the fully loaded pressure from the first outing in the spring until the last outing in the autumn.
We only do about 4-5 thousand miles a year, including towing so I don't worry to much.

[Wayfarer]

Thanks for the info, I have not tried the part load pressures for towing apart from one short low speed 5 mile tow, but have left the full load pressures in them between tows and find the ride a little firm.
So maybe I should try leaving the fronts at just over semi loaded pressures and the rears at close to fully loaded pressure and keep an eye on wear etc, reckon I’ll do about 12k miles a year, but want to replace tyres as infrequently as possible, given the somewhat high cost of 21” tyres.

Might even look out for a set of 20” wheels