Inline skating is a recreational sport practiced widely internationally. Inline skates typically have 2 to 5 polyurethane wheels, arranged in a single line. The in-line design allows for greater speed than roller skates and better maneuverability. The in-line wheels coupled with boots designed for skating of various obstacles Inline-skating is practiced and performed using inline skates designed for race tracks, skate parks, Urban areas, and off-road.
Aggressive inline skates could also be fitted with small hard rubber or plastic wheels, used in place of the two middle wheels. These small wheels or “anti-rockers” are used to help lock onto a ledge or rail when performing. Anti rockers enable the skater attempting the trick to easily jump on a rail and stay on it for a longer time without the frames of the skates slipping off the ledge.
Aggressive inline saw a sharp decline in the late 1990s, but during 2000-2003 found a major resurgence for the sport when street skating became increasingly popular. At this time professional skaters including Brian Shima, Franky Morales, Omar Wysong, Dre Powell, Brian Aragon and Aaron Feinberg, among others were pushing unseen boundaries in performing seemingly impossible and dangerous stunts in mostly street settings. In addition, the IMYTA (I Match Your Trick Association) provided a venue for skaters to demonstrate these tricks. The IMYTA held contests at a street location and the skaters would have to match each trick in the first round of skating or be eliminated. The progression continued with the pool of skaters dwindling and more dangerous and difficult tricks would then be performed and a winner declared. Competitions such as the IMYTA encouraged skaters from many different countries to set up their own local real street competitions.
Some Aggressive inline brand names are as follows: Valo, Remedyz(Remz), Razors, USD, K2, Nimh (now known as: shima skate manufacturing co.), Xsjado, Roces, Deshi (merged with USD), and Rollerblade.
A skating category that lies somewhere between aggressive and recreational skating, powerblading, also known as urban skating, free riding free skating, includes many tricks such as jumps, slides, and grinds. The emphasis of powerblading is getting from A to B by the fastest possible route, similar to parkour, by skating quickly through city streets and negotiating all obstacles. The boots on skates suitable for powerblading tend to be more rigid for better leg support, like the aggressive skate, whilst the wheels tend to be rather big, like those found on recreational skates, and the frames short, like those found on hockey skates.
Reference: Wikipedia Inline Skating