Thanks for all the replies.
Van is a T30 with a full camper conversion. But I dont pick the van up untill March 1st, and then it goes away to the converters until the end of March.
The new tyres that I have had fitted today to the rims are load rated to 102. These I intend to use as Summer wheels / tyres.
Considering everbodies suggestions, I will try them at 42 /43 PSI and see how they feel when driving.
The only photo I have is with the original 255/55/19's, Bridgestone Duelers HP sport 111H tyre , as fitted originally when on a Amarok.
I dropped really lucky with these, buying them brand new after a new Amarok owner wanted 21" alloys, so these came off at PDI when at the dealers.
The original tyres still have the dimples on them, they have probably covered no more than 5 / 10 miles at most - I really need to get these sold to pay for the new tyres
The new wheel / tyres are eagerly awaiting fitting in April when the sun starts to shine...