Originally Posted by Amleto63
Remaining treads' depth? If a couple of millimiters it is normal but not safe even if legal. I usually change my tires at 4 mm tread.
I have not measured the depth - they are down to the tyre wear indicator now - so this is at, or just over the 1.6mm mark, I believe.
What mileage are you getting when you change at 4mm? What brand / tyres are you using?