Combination of moulded grooves, sipes and ribs forming the tyre's wearing surface.

The tyre design or "sculpture". It varies according to the tyre purpose (i.e. rain/wet are more grooves and channels for optimum water dispersion, whilst dry/tarmac tyres are less grooved as they function is to maximise the contact area with the ground).

The arrangement of blocks, grooves, sipes, and channels designed into the tread to enhance its grip. Also called the tread design.

This is the configuration of voids, blocks, grooves, sipes, etc. of the tread constructed to provide some of the characteristics of a tire.

the arrangment of grooves, blocks, sipes and channels on the tread.