Hey Mark, completely agree my post was in reflection to the OP post re costs not hurting the pocket or buying a used set off ebay. Most used tyres on ebay are either of breakers and possible accident vehicles, have been repaired or are around the 5mm depth or below. Just my view yet a tyre starts to lose it's efficiency, grip etc and by 3mm albeit the legal limit is lower by this point the tyres on a performance car in my opinion should be replaced. All my point is yes we can save a few quid short term yet long term in my book it's false economy