09-03-2012, 01:02 AM
It's because of the rolling radius - look at it like this if you have a tyre completely worn down and totally bald and totally illegal then you have one with 8 mm of tread on it and brand spanking new. The new tyre will do less revolutions to cover the same distance or it will cover a longer distance for the same amount of revolutions because it has a slightly bigger radius, so yes it will in fact be slightly different but not so much as to feel very different - most people wouldn't detect it, incorrectly inflated tyres can also cause a very slight difference as well but that is even less detectable.