Inline speed skating is the roller sport of racing on inline skates. It is often called inline racing by participants. Although it primarily evolved from racing on traditional roller skates, the sport is similar enough to ice speed skating that many competitors are now known to switch between inline and ice speed skating according to the season.
An inline speed skate is a specialized shoe version of the inline skate. The boot or shoe is close-fitting, without much padding and usually made of leather and carbon fiber and/or fiberglass composites. The lower part of the boot is usually made of carbon fiber and the upper part with leather. This also protects the boot from getting damaged on hitting other boots during a race. For best performance, the boot must conform closely to the shape of the foot, so most inline speed skating boots are heat-moldable, which allows the user to re-shape the boots to some extent when heat is applied (by placing the boots in oven at 185 °F (85 °C) for 15 minutes after taking off the wheels, frames, and straps/buckles). It is also quite common to have boots custom-made for improved fit.
Speed skating boots are low-cut and offer little ankle support, allowing the skater extra ankle movement. Skin blisters due to friction can be a problem, and common solutions include: neoprene or silicone "ankle bootee" such as "Ezeefit" or "Bunga Pads", double thin synthetic socks, smaller boots, improving technique, re-moulding the boots, sports tape, and use of "advanced healing" plasters to help recovery.
The frame (sometimes called the chassis or plate) which holds the wheels is made of aircraft-quality aluminum, magnesium, and new developments in technology have allowed Carbon fiber. Frames flex during skating, and the amount of flex can be a personal factor in which one to choose. Very "stiff" frames are usually favoured by heavy skaters. A frame which is too stiff for a particular skater may feel unstable on corners, and a frame that is not stiff enough will be slower. Frame stiffness also works along with boot and wheel stiffness, so there are endless possible variations. A light frame is desirable. The new-age frames that are being developed are designed to absorb minute shocks and jerks that are usually experienced, thereby not hindering the skater's momentum. Ideal frame length is affected by foot size and wheel size. A slightly shorter frame is often preferred for the tight curves of smaller tracks but is slower. A longer frame is faster but much harder to turn.