I've just had the front tyres replaced by the dealer as they were below 3mm when I bought the car.
However I was surprised to find when checking the car over yesterday (only replaced on Weds & done less than 100miles since) that they were less than 7mm. I have to confess I immediately thought, 'have they come off the demo with the replacement alloy'. However on further checking it seems that new they are only 6.8mm. I had always thought that all summer tyres were circa 8mm new & some winter/all weathers even more....seems not !
Tread on new Conti SportContact 5's