"Speed" (スピード) is the fourth single released by the Japanese rock band Buck-Tick. It was released as the first single from the group's sixth studio album, Kurutta Taiyou, on January 21, 1991, through Victor Entertainment. The single was released as an 8 cm CD in a cassette-like sleeve case that featured a re-worked version of the cover to Kurutta Taiyou. "Speed" peaked at number 3 on the Oricon music chart during the third week of 1991. It is band's 3rd best-selling single, with over 180,000 copies sold.