From the 1860s roller skates usually had wheels in pairs next to each other under the sole. The wheel sets were constructed so that they turned when the skate tilted, like with a skateboard.
Braking was done by means of rubber pads in front and /or behind the wheels.
In the 1980s, roller skates with all wheels in line, so-called inline skates was developed, which made the use nearly replicating the usual ice skating technology.
