What rear tyre pressures while towing our camper?

Depends on the tyres, the load, the terrain and the speed, but generally it'd be around 40-45 psi and 3 or 4 psi higher than the front wheels.

We have a BT50 with a small caravan that weighs about 1.5 t. I have found for highway/ good roads I use the figures on the inside of the drivers door for heavy load but have the fronts a bit less.Thats with a reasonable load in the rear. With no load in the vehicle Id go to mid load settings.

Hi L+ B, have a look on tyre itself ( or tyre plaque), quite a few I know of have load and recommended psi of tyre and the tyre details ( 16R etc..) as imprinted/ raised rubber writing. load to ea tyre should = vehicle tare+ contents weight inc fuel @ 1kg per L approx. + ball weight ,distributed over the 4 tyres- with allowance for slight front-rear difference as appropriate( eg: 35 front, 40 rear).
as others have also said: allow for terrain, etc.. and I would regularly check for long distance= hotter tyre. same applies to sand driving, Temp increases and your original 12-15psi that was good for soft going becomes a lot higher-have seen this on several bush/beach trips.
MG.

Thankyou everyone for your responses. Car and camper ready to head off to Gibb River in three weeks. All fully loaded up. Rear tyres just looked low. Was just wondering what everyone else was doing with there rear tyre pressure.

Cheers L and B

Hi we have a 100 series towing an Aussie swag camper and did the gibb river road a couple of years ago and we had to change our pressures often according to the terrain, so make sure you carry a good air compressor and tyre gauge , have a wonderful trip and travel safe
Cheers Judy and Laurie

Hi

I have a 2011 BT50 2.5 diesel ute 2wd. I tow a small van. I have placed it over a weighbridge and when loaded with all my gear including a small boat on the ute, weights are as follows

Front tyres combined: 1000kg running 29 PSI
Rear tyres combined: 1500kg running 44 PSI
Van tyres combined: 900kg running 50 PSI on 165.13 8 ply LT tyres.

Ball weight is approx 140kg.

Pressures derived by taking actual load on tyre divided by max permissible load on tyre multiplied by max tyre pressure, ie for a 500KG actual load on each tyre with max load rating of 800KG each @ 65 PSI, would be 500/800x65 = 40.625 PSI.

regards Kevin