Quad roller skates are roller skates with 4 wheels. They are different than traditional inline hockey skates in that they are in the 4 corners of the bottom of the skate instead of all in a single row.
They are the type of roller skates that have four wheels on each foot. Unlike rollerblades, which typically have four wheels as well, only in a straight line, quad roller skates have two in the front and two in the back.
Quad roller skates are the older style skates which were popular before inline skates (roller blades). They have four wheels in a rectangular formation on each skate. The upper portion of the skate is usually made of leather.
They are roller skates with four wheels, two rows of two wheels. This design is different from in-line skates, which resemble hockey skates, with a vertical column of 4 wheels.