A tire comprising a tread, the tread comprising n (n represents an integer of 3 or more) rubber layers, wherein, in a case where a rubber sample comprising interfaces of a k-th rubber layer (k represents an integer of 1 or more and n-2 or less) and a k+1-th rubber layer counted from a tread surface, cut out from the tread, is irradiated with neutron rays to perform a neutron scattering measurement, the tread is characterized in that the rubber composition of each layer of the tread comprises as rubber components at least one selected from the group consisting of an isoprene-based rubber, a styrene-butadiene rubber, and a butadiene rubber as rubber components and in that a scattering intensity when a scattering vector calculated from a scattering intensity curve thus obtained is 0.12 nm -1 is defined as X k (cm -1), and a rubber sample comprising interfaces of a k+1-th rubber layer and a k+2-th rubber layer counted from the tread surface, cut out from the tread, is irradiated with neutron rays to perform a neutron scattering measurement, and a scattering intensity when a scattering vector calculated from a scattering intensity curve thus obtained is 0.12 nm -1 is defined as Xk+1 (cm -1), |X k - X k+1 | is 0.10 cm -1 or less for at least one k, wherein the rubber sample to be subjected to the neutron scattering measurement is cut out so as to include the interface of each rubber layer with 20 mm in length × 20 mm in width × 20 mm in thickness so that a tire circumferential direction becomes a long side, from inside of a rubber layer of a tread part of a tire, and wherein the neutron scattering measurement is a Small-Angle Neutron Scattering (SANS) measurement with a scattering angle of 10 degrees or less, by which the target rubber sample is irradiated with neutron rays to measure a scattering intensity, and wherein a neutron flux intensity (neutrons/cm 2 /s) of the neutron ray is 10 3 or more, more preferably 10 4 or more, and wherein in the SANS measurement, a method utilizing a known magnetic structure or deuteration method is used. wherein, in a case where a rubber sample comprising interfaces of a k-th rubber layer (k represents an integer of 1 or more and n-2 or less) and a k+1-th rubber layer counted from a tread surface, cut out from the tread, is irradiated with neutron rays to perform a neutron scattering measurement, the tread is characterized in that the rubber composition of each layer of the tread comprises as rubber components at least one selected from the group consisting of an isoprene-based rubber, a styrene-butadiene rubber, and a butadiene rubber as rubber components and in that a scattering intensity when a scattering vector calculated from a scattering intensity curve thus obtained is 0.12 nm -1 is defined as X k (cm -1), and a rubber sample comprising interfaces of a k+1-th rubber layer and a k+2-th rubber layer counted from the tread surface, cut out from the tread, is irradiated with neutron rays to perform a neutron scattering measurement, and a scattering intensity when a scattering vector calculated from a scattering intensity curve thus obtained is 0.12 nm -1 is defined as Xk+1 (cm -1), |X k - X k+1 | is 0.10 cm -1 or less for at least one k, wherein the rubber sample to be subjected to the neutron scattering measurement is cut out so as to include the interface of each rubber layer with 20 mm in length × 20 mm in width × 20 mm in thickness so that a tire circumferential direction becomes a long side, from inside of a rubber layer of a tread part of a tire, and wherein the neutron scattering measurement is a Small-Angle Neutron Scattering (SANS) measurement with a scattering angle of 10 degrees or less, by which the target rubber sample is irradiated with neutron rays to measure a scattering intensity, and wherein a neutron flux intensity (neutrons/cm 2 /s) of the neutron ray is 10 3 or more, more preferably 10 4 or more, and wherein in the SANS measurement, a method utilizing a known magnetic structure or deuteration method is used.