After a long trawl through tyre suppliers to obtain Trailermaxx tyers which were OEM fit I drew a blank. I was offered car or commercial van tyres that were incorrect as far as load rating was concerned. I then looked at the GT Radial tyer company web site. Their GT Maxmiler tyres can be seen on vans. But they have a specific caravan /trailer tyre called Kargo Max and it comes in two versions, ST 4000 and ST 6000. This tyre is specifically designed for van and trailers in a range of sizes and load ratings. Mine was £63 (each) from Pneus-Online and that was shipped from Holland. Fitting will ad £12 but I now feel comfortable that I have a suitable tyre for the van. I have contacted GT Radial and told them that they could be more proactive in marketing their tyres.