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Minimum Legal Tyre Tread Depth



I've phoned around several local bike dealers and tyre fitters and they seem
to have different opinions on bike tyre depths.

So what is the legal minimum?
Tyres

Tyres MUST be correctly inflated and be free from certain cuts and
other defects.

Cars, light vans and light trailers MUST have a tread depth of at
least 1.6mm across the central three-quarters of the breadth of the
tread and around the entire circumference.

Motorcycles, large vehicles and passenger carrying vehicles MUST have
a tread depth of at least 1mm across three-quarters of the breadth of
the tread and in a continuous band around the entire circumference.

Mopeds should have visible tread.
Laws CUR reg 27
1mm Mopeds, 1.6mm other bikes.
The law says 'visible' for Mopeds, 1mm other bikes. However, your
suggestion is more reasonable.
Bzzzzzt. and no, that's not a vibrator.
There isn't a measured minimum for mopeds. They've just got have something
you can see, rather than a slick.
It only has to be visible with mopeds, not necessarily 1 mm.