The design of the Gravity uses even the space in between the lugs to increase traction.

3D faces enlarge the surface of the tread. The surfaces are determined by free falling u-bends or Arcs. The shape comes naturally, and at a minimum material input to keep weight low.

The contact patch or "footprint" of the tyre to the ground gets bigger, therefore improving traction.

Additionally, the Arcs/u-bends reinforce the tread blocks which helps the tyre hook up more effectively.

The lugs flex less under load, so steering response is improved as the shoulder knobs do not squirm during cornering. This is because the stresses are dissipated over a wider surface area. 

Gravity Arc Profile - block design

The tops of the tread blocks are sharp & hard

These cut through wet & loose surfaces more rapidly

Additionally, they hold very well on hard stony ground to give a more responsive ride

The edges of the lugs are rectangular to the incoming traction & steering forces

This way the lugs can take the forces and deliver them directly to the ground without braking loose

The shoulder edges (left) run with the rotation for fast & secure cornering

The centre tread edges (below left) run at 90° to rotation for perfect traction & braking