| 摘要 |
[Object] To provide a pneumatic tire 2 from which static electricity is easily discharged. [Solution] The tire 2 includes penetration portions 8, an under tread 6, a belt 18, a carcass 16, and clinches 12. The carcass 16 includes a large number of cords aligned with each other, and a conductive topping rubber. The electric resistance Rc of the carcass which is represented by the following mathematical formula is less than 1.0 × 10 8 ©. Rc = Á / g / 2 × 3.14 × r × L × 10
In the mathematical formula, p is the volume resistivity (©·cm) of the topping rubber of the carcass, g is the minimum thickness (mm) of the topping rubber, r is the distance (m) from the axis of the tire to an outer end, in the radial direction, of the clinch, and L is the length (m) of the carcass from an end of the reinforcing layer to the outer end, in the radial direction, of the clinch. |
