Practice question

What is the 'Traction Pie' / 'Friction Circle' principle in motorcycle cornering and braking dynamics?

  1. Tires have infinite grip as long as the motorcycle is traveling above 100 km/h
  2. Braking increases cornering traction by adding extra rubber to the tire carcass
  3. Tire contact patch friction is a finite 100% budget shared between cornering (lean) forces and braking/accelerating forces; if 80% is used for lean, only 20% remains for braking before sliding occurs
  4. Traction is determined solely by the color of the motorcycle's paint

Answer: C — Tire contact patch friction is a finite 100% budget shared between cornering (lean) forces and braking/accelerating forces; if 80% is used for lean, only 20% remains for braking before sliding occurs

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