In line skating is a multi disciplinary and is a sport that's practiced all around the world
I didn't realize it was that popular. Where did it start?
Yeah its very  popular .  Not much info on that but i did find that inline skates typically have 2 to 5 wheels
I wonder if they have a brake pad too like roller skates?
Not much information but it does state that in line skates design does allow for much greater speeds
I wonder if they have a contact sport like roller derby lol
by the proprietary eponym "rollerblading", or just "blading", due to the popular brand of inline skates, Rollerblade.
History.
The German branch of SKF developed and produced inline-skates in 1978 with wheels for hockey or for the street. The product was stopped after one year as the management did not want a consumer product in its portfolio.
Other inline skates were developed as a substitute for ice skates, "Life" magazine published a photo of American skater Eric Heiden, training for the
Inline skating
Inline skating is a multi-disciplinary sport and can refer to a number of activities practiced using Inline skates. Inline skates typically have two to five polyurethane wheels, arranged in a single line by a metal or plastic frame on the underside of a boot. The in-line design allows for greater speed and maneuverability than traditional (or "quad") roller skates. Following this basic design principle, inline skates can be modified to varying degrees to accommodate niche disciplines.
Inline skating is commonly referred to