A tire comprising a tread portion , wherein the tread portion includes a ground contacting surface , and at least one first groove opening at the ground contacting surface , a tread rubber forming the tread portion includes a first rubber layer not exposed at the ground contacting surface and a second rubber layer connected to the first rubber layer on an outer side in a tire radial direction, the or each first groove includes a first groove edge , the first groove edge being one of two groove edges of the or each first groove appearing on the ground contacting surface , a groove bottom surface located radially inside the second rubber layer , and a first groove wall connecting the first groove edge and the groove bottom surface , in a lateral cross section of the or each first groove , the first groove wall includes a first wide top portion arranged between the first groove edge and the groove bottom surface , the first wide top portion is located outside the first groove edge in a groove width direction of the or each first groove , and the first wide top portion is positioned in the second rubber layer ; characterized in that the or each first groove has a groove width (W2) measured at a depth (d4) of the first wide top portion in a range from 100% to 120% of the groove width (W1) measured at the ground contacting surface ; and the second rubber layer has a complex elastic modulus E*2 smaller than a complex elastic modulus E*1 of the first rubber layer , wherein the complex elastic modulus E* is a value measured by using a viscoelastic spectrometer under the following conditions according to Japanese Industrial Standard JIS-K6394: Initial strain: 10%; Amplitude: ±2%; Frequency: 10Hz; Deformation Mode: Tensile; Measurement temperature: 30°C the tread portion includes a ground contacting surface , and at least one first groove opening at the ground contacting surface , a tread rubber forming the tread portion includes a first rubber layer not exposed at the ground contacting surface and a second rubber layer connected to the first rubber layer on an outer side in a tire radial direction, the or each first groove includes a first groove edge , the first groove edge being one of two groove edges of the or each first groove appearing on the ground contacting surface , a groove bottom surface located radially inside the second rubber layer , and a first groove wall connecting the first groove edge and the groove bottom surface , in a lateral cross section of the or each first groove , the first groove wall includes a first wide top portion arranged between the first groove edge and the groove bottom surface , the first wide top portion is located outside the first groove edge in a groove width direction of the or each first groove , and the first wide top portion is positioned in the second rubber layer ; the or each first groove has a groove width (W2) measured at a depth (d4) of the first wide top portion in a range from 100% to 120% of the groove width (W1) measured at the ground contacting surface ; and the second rubber layer has a complex elastic modulus E*2 smaller than a complex elastic modulus E*1 of the first rubber layer , wherein the complex elastic modulus E* is a value measured by using a viscoelastic spectrometer under the following conditions according to Japanese Industrial Standard JIS-K6394: Initial strain: 10%; Amplitude: ±2%; Frequency: 10Hz; Deformation Mode: Tensile; Measurement temperature: 30°C <EOS>