Tyre depths

3mm for me as well, especially as I use all season tyres which start to lose much of the benefit under 3mm

Michelin have argued that performance all the way down to 1.6mm satisfactory and that changing at 3mm is costing vehicles owners dearly.

I'll need to see how my current set of CrossClimates hold up, but my usual annual mileage is such that I generally get twitchy about the age of a tyre before the tread runs out.

Presumably 1.6mm was set as a depth considered to be safe to drive down to by the powers to be so 3mm seems bit of a money burner for no real reason.

It used to be the edge of the writing on a two-bob bit.

i never go below 2mm

you only live once

The other factor is age  -  depending on whose advice you accept, tyres should be changed at between 5 and 7 years regardless of tread depth.

The real fun is that the 44 ton truck filling your reareview mirror is on 1mm and the pizza delivery guy as he skids into your bonnet is visible tread.

Happy driving. 

I just hope you're not following me on a wet road when I stop quickly, because you won't on 1.6mm. You'll still be skidding when you rear end me.

Those 4 patches are all you have in contact with the road, doesn't matter how good your brakes are.

3mm minimum, for me. Anything less is false economy

I suppose in the end it all comes down to how safe you want to be and how much you value your own life.  If the answer is not much, by all means go down to 1.6 mm or even lower if you really don't care!

Me? I would never go below 2mm and I usually change at about 2.5mm. Remember your only contact with the road, and therefore your ability to control your car depends on about 4 sections of rubber about 4 inches by 3 inches (Depending on tyre size)  Personally I like those 4 sections to be as grippy and less prone to slipping as possible.  You never know what that other idiot will do.

( Ex Police grade 1 driver, I.A.M, over 1.25 million miles covered and no accidents)

Tyre safety is YOUR responsibility!