Tyres

[kwicky]

I believe the legal depth of tread is 1.6mm min. Is the tyre still legal if the edges of the tyre are worn caused by scuppering or bad tracking?

[kempie]

The legal 1.6mm minimum tread depth must extend over the centre 75% of the tyre breadth, as shown in this cross-section diagram.

Tyre condition such as cuts, lumps, bulges, tears, exposure of the ply or cord, or tread separation will also render it illegal.

http://www.motuk.co.uk/manual_410.htm

[woodchopper]

One edge scuffed/feathered = incorrect wheel alignment.
Both edges scuffed/feathered = incorrect air pressure (too low )