Very much in vogue from 1975 to 1990, quad skates (also known as derby skates) were essentially a shoe on which they stuck a chassis and 2x2 parallel wheels, soft and wide with a small diameter. They were the famous strap-on skates, that were simply called roller skates. Quad skates were dethroned in the 1990s by inline skates but have now finally found their place. Very much in vogue, it offers three different disciplines: recreational (doing jumps, riding around town etc.), the roller derby and artistic skating (dancing in skates).