howmuch psi

I used to have the orignal size tires 7.00 / 15 with the correct pressure of 50psi

but as i could not get them here in holland ,I had to settle for the next best

and that was 8.40 / 15 and they are 10 ply .

now what is the best tire pressure for these tires ?

the trailer weighs about 2.3 tons

26 foot overlander from 1968.



regards George