Which is better for measuring tread depth? I use a digital one which is also a pressure gauge but would an analogue type be better? Was in the dealer today to get my wiper blades changed and also because I'm measuring my front tyres at about 3.2mm and the rears at around 3.7mm. At the front it's almost hit some marker in the tread which I thought would be 3mm but I think it's actually a 1.6mm marker. BMW recommend changing them at 3mm so they said bring it in. It's under maintenance contract with an independent finance company so no skin off their nose I guess. They came back saying there was 62% wear exactly on all four tyres (it's on the internal invoice), which is around 4.5mm, which is of course because they wouldn't all wear at the same rate. I'm careful to make sure the gauge I use is flat with the tyre but as the needle isn't central I don't think it's as good as an analogue one which has a large flat surface on both sides. But even so, I'm definitely not pushing it into the tread and can't get anywhere near above 4mm unless I tilt it away from the tread! lol This is what mine looks like: I'm thinking this may be more accurate? One thing I did notice was they had a pretty cool car wash system. It's like a big square frame which rises up and basically soaks the car from all angles at once! Saves a lot of time compared to going around with a pressure washer. I'll chuck a wee video up of it. - - - Updated - - - Forgot to say, the technicians appear to be very professional which is something I noticed at Mitsubishi also and they were always calm and just got on with the job. The technicians at Honda unfortunately weren't like this, lots of complaining, sighing, shouting and gave the impression that every job pissed them off. I suppose if the end result is good then who cares, most people wouldn't know any different.