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Flatland is a freestyle BMX riding style performed on smooth flat surfaces that do not include any ramps, jumps, or grindrails. It is sometimes described as a form of artistic cycling with a blend of breakdancing. Flatland occupies a position somewhat removed from the rest of freestyle BMX. They are often very dedicated, and will spend several hours a day perfecting their techniques. Flatland also differs from the others in that the terrain used is nothing but a smooth, flat surface. Tricks are performed by spinning and balancing on the bike in a variety of unexpected positions. Riders almost always use either knurled/grip taped aluminum or plastic pegs to stand on to manipulate the bike into even more imaginative positions. Flatland bikes typically have a shorter wheelbase than other freestyle bikes. This shorter wheelbase requires less effort to make the bike spin or to position the bike on one wheel. One of the primary reasons flatlanders often ride only flatland is the decreased stability of using their shorter bikes on ramps, dirt and street. A variety of options is commonly found on flatland bikes. The most unifying feature of flatland bikes is the use of four pegs, one on the end of each wheel axle. Flatlanders will choose to run a front brake (or a dual front brake; one front brake with two brake levers using one brake cable), front and rear brakes, or no brakes at all, depending on stylistic preference. ==Flatland bikes== Although the flatland bicycle is similar to most other BMX bicycles, flatland is often performed with specially designed frames with geometry (head tube angle, top tube length, etc.) suited to the needs of flatlanders. Front and rear bolt-on pegs, a hollow compression bolt on the forks for the front brake cable, and a rear brake cable detangler or ''Gyro'' to allow the bars to rotate endlessly without tangling the brake cables. Also invented specifically for flatland riding is the rear hub mechanism known as a freecoaster, which allows the rear wheel to roll backwards without engaging the hub and making the cranks rotate backwards as they would on a normal freewheel or cassette style hub. Other technical bicycle setup specifics can include zero offset forks, narrow handlebars, very high pressure tires (100psi and higher), and a very small front sprocket (18-28 teeth). 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「Flatland BMX」の詳細全文を読む スポンサード リンク
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