So gang, one of my colleagues at work is a total high quality geek and really goes to the nth degree on things. He runs a very nice condition Bristol and just spent £1600 on new tyres manufactured to old specs to keep it totally original. I told him I can get 4 sets of 4 Michelins and change for my A4 for that money! His retort to my A4 jibe was the diagram below from his mechanic / tyre seller (no hidden agenda there)! But the logic says the old cars' suspension and geometries were set up for old tyres, so with new tyres they are not going to break away progressively. Any thoughts, experience, prior punch ups on this topic?