Double-row roller skates, also known as double-row inline skates, are a type of roller skate. Invented in 1863 by American James, they feature four wheels arranged in two groups, front and back, with two wheels connected by two axles. The wheels rotate stably, allowing for turns, forward and backward movements. They are used in roller hockey, figure skating, jam skating, extreme roller skating, speed skating, and roller skating obstacle courses, with figure skating, jam skating, and obstacle courses specifically requiring double-row roller skates.
Early double-row roller skates had separate boots and baseboards, requiring users to wear their own skates and secure them with laces. In early Shanghai, this sport was called "skating" or "roller skating," but in 1986, the State Sports Commission officially designated it as "roller skating." In 1981, the Shanghai Roller Skating Association was established, and "roller skating" became the more professional name.
