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Dirtsurfing is the sport of riding a Dirtsurfer brand inline board. This new Australian boardsport is correctly known as inline boarding because Dirtsurfer is a trademark protected brand name.() A Dirtsurfer is composed of an aircraft aluminium tube frame, a laminate or composite deck and two 20in or 16in diameter BMX style bicycle wheels. Footstraps are (optionally) attached to the deck to give more control to the rider. The board is unique in that it incorporates a patented steering geometry () where the front wheel pivots from a point in front of and below the axle of the wheel, via the 'Swingarm'. The rider's weight automatically centres and straightens the front wheel, creating stability and control. Another feature of the Dirtsurfer which is not found on other four-wheeled boards is that, much like a bicycle, the stability actually increases with speed. Inline Boarding was made an official race class by the International Gravity Sports Association (IGSA) and Gravity Sports International (GSI) in 2005. The 2005 IGSA World Cup Champion inline boarder is Nihat Uysal of Germany.() Nihat rides the Silver GP-X (see below) ==Models== The first board was designated the GP (general purpose) and was available in black, red and blue colour options. Initially it was sold without brakes, which were later made standard as an addition to the existing frame, and utilised a retro fit "calf lever" operating system. A Limited Edition model was made of the GP, which offered a silver anodized frame, V rim wheels and a signed certificate and number. The next board made available was the GP-X, which came with a silver anodized aluminium frame, blue anodized deep V rims, fully integrated calf brake with moulded plastic lever, increased ground clearance, disc brake caliper lugs on the frame, and disc hub on the rear wheel for easy conversion to disc brake use. Two alternative versions to the GP-X were produced. The first, called the Road Racer, used the same frame as the GP-X in canary yellow powder coat finish, with black V rims and slick tyres. The other was a UK specific beach racer model, with sealed bearing hubs, Black V rims, disc brake as standard, and beach tread tyres. In 2003, Dirtsurfer introduced the Flexideck, a newer concept with an epoxy/fibreglass/maple composite deck connecting the front and rear frame to absorb jumps. Made available in powder coated lime green frame with purple anodized V rims, and disc brake as standard, it offered greatly increased ground clearance and a reinforced frame for jumping. Dirtsurfer has updated their line-up with two new models for 2006: The Flexi Pro Downhill (DH), an updated Flexideck; and the all new Freestyle board (FS), a scaled down Flexideck with 16 inch wheels. Both models feature the new adjustable metal calf brake lever, rear disc brake, and new thermofibre deck. In addition to updating their flexideck boards, dirtsurfer also updated the their line of General Purpose models (GP). Both are manufactured from HT steel. The new 16" GP comes in white, with the new braking lever and disk brakes. The new GP 20" come in black and also has the new braking handle and disk brakes. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dirtsurfing」の詳細全文を読む スポンサード リンク
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