Pneumatic tire

摘要

A pneumatic tire having a tread portion, a pair of sidewall portions, a pair of bead portions each with a bead core therein, wherein in a tire meridian section including a tire axis under a standard state that the tire is mounted on a standard rim and inflated to a standard pressure but loaded with no tire load, the tread portion has a tread width TW (mm) being from 80 to 90% of a nominal tire width YW, a profile from a shoulder region of the tread portion to the sidewall portion includes a shoulder profile for defining the shoulder portion, a sidewall profile for defining at least a part of the sidewall portion, and a buttress profile smoothly connecting between the shoulder profile and the sidewall profile.

主权项

1. A pneumatic tire comprising
a tread portion; a pair of sidewall portions; a pair of bead portions each having a bead core therein; a carcass extending between bead cores through the tread portion and sidewall portions; and a belt disposed radially outside the carcass in the tread portion, wherein in a tire meridian section including a tire axis under a standard state that the tire is mounted on a standard rim and inflated to a standard pressure but loaded with no tire load, the tread portion has a tread width TW (mm) being from 80 to 90% of a nominal tire width YW, and a profile of an outer surface of the tire from a shoulder region of the tread portion to the sidewall portion includes:
a shoulder profile for defining the shoulder portion which is an arc having its center inside of the tire and has a radius of curvature of from 35 to 55 mm;a sidewall profile for defining at least a part of the sidewall portion which is an arc having its center inside of the tire; anda buttress profile smoothly connecting between the shoulder profile and the sidewall profile, wherein the buttress profile is an arc having its center outside of the tire and has a radius of curvature of from 20 to 60 mm.