The minimum tyre tread depth in the UK is 1.6mm.
4/32 on steer axle.2/32 on all others
Minimum tread depth for all 4 tires is 2/32"
If you mean tire tread depth, the minimum is 1.6mm.
1.6 mm is the minimum
Minimum LEGAL tire tread depth is 2/32nds of an inch.
4/32nds of an inch
UK is 1mm
1mm according to UK law
in Manitoba we fail them at 3/32"
A typical automotive vehicle legal tread depth is 2/32", which isn't much.
In most of the USA, the legal minimum is 2/32 inch.