Patent ID: 6715522
Filing Date: 2004-04-06
Classification: B60C,Y10S

Abstract:
A combination of front tires and rear tires for a vehicle, each of the tires comprising a plurality of tread elements divided by tread grooves,the rear tires each having a tread pattern rigidity Pr, the front tires each having a tread pattern rigidity Pf, the tread pattern rigidity Pr being more than 1.1 times the tread pattern rigidity Pf, wherein the tread pattern rigidity P (Pr, Pf) is defined as a quotient of the total of circumferential rigidity of all the tread elements existing in a ground contacting region of the tire which is divided by the area of the ground contacting region, and the circumferential rigidity K of each tread element is defined as a quotient of a tangential force F in kgf received at the ground contacting region which is divided by a displacement y in mm at the ground contacting region, and the tread pattern of the front tires and the tread pattern of the rear tires being the substantially same block patterns excepting that the number of sipes in each of the front tires is larger than the number of sipes in each of the rear tires.