OK, time to bite the bullet.
4 new tyres needed to replace the existing (3 unknown brand, 1 Goodyear). Standard D2 18" alloys on a 7 seat, air sprung, ACE, auto, Td5 (moderate ECU map)
Mostly on-road usage (say 90%+, but don't want to be embarressed on unmade surfaces / grass etc). Currently...