Thanks for the information - tyres are becoming difficult to get in standard tyres or tyres that will fit rims. I am considering wider rims to open up the range of available tyres and keep the "originals" for car meets etc.
Thanks - unfortunately we do not have Cokers and our suppliers do not stock those Firestone tyres. Also the speed rating is too low for the truck at 90 kph. In my company these would be illegal to put on - not a problem until something happens then hughe legal problems. I think my solution is to go to wider wheels as you can go 1" wider without an engineers certificate and put on more modern tyres which have a bigger range.