自転車の開発
Invented in Germany in 1817, the world's first bicycle was a two-wheeled wooden vehicle that could be straddled and propelled by fast walking. It was invented to meet the need for horseless transportation during a time of oat shortage, calling it the laufmaschine or "treadmill". Built almost entirely of wood, it weighs 22kg and has no pedals, but what it lacks in practicality it makes up for in speed. On its maiden flight, the bike covered 13 kilometers in less than an hour.
1960年、父と息子のデュオはパリで馬を引く馬車を製造する会社を経営し、1867年頃に最初に二輪自転車を組み立てました。自転車は三輪車のように推進され、前輪に取り付けられたクランクとペダル。
最初のギアバイクがリリースされますd in1871. Pneumatic tires is in 1888
John Boyd Dunlop is a Scottish veterinarian living in Belfast. His son complained that the cobbled streets made his hips sore as he biked to school. Dunlop solved his son's problem by inventing the inner tube and patented a pneumatic tire, which is essentially a hose tube inside an outer rubber tire with a tread. But it was withdrawn two years later due to a previous patent by Scottish inventor Robert William Thompson.
安全自転車
The term safety bike was used in the 1880s to refer to any alternative to the penny, and it sparked a bike craze due to being lighter, cheaper, and easier to ride. Unlike penny farthings, the rider's feet are within range of the ground, making it easier to stop, greatly reducing the risk of "heading" or falling over the handlebars for extended periods of time. The bicycle's impact on women's liberation was enormous and became a symbol of the new woman, at the heart of the "dress for reason" movement of the late 19th century.
Sポート自転車
In the 1890s, women's versions of sports car designs were already very popular. It has a stepped frame, rather than the diamond-shaped frame of the gentleman's style, so that ladies can wear dresses and skirts for easy rides and bikes, and often comes with skirt guards to keep skirts and dresses from getting tangled. rear wheel and spokes. Like the men's sports car, the frame is steel, and the frame and handlebars are positioned to give the rider a very upright riding position. Although they originally came with front scoop brakes, technological advancements meant that later models came with much-improved coaster brakes or lever-actuated rim or drum brakes.
BMXバイク
BMXバイクは、通常16〜24インチのホイール（20インチのホイールが標準）を備えた専用のバイクであり、1970年代初頭に10代の若者がバイクでモトクロスヒーローを模倣したときにカリフォルニアで生まれました。 In the Netherlands, children race on standard road bikes on an off-road track. The 1971 motorcycle racing documentary On Any Sunday is generally credited with sparking a national movement in the United States. In the opening scene, the kids ride their Schwinn Sting-Rays off-road. It wasn't until the middle of the century that the sport reached critical mass and manufacturers started making bikes specifically designed for the sport.
マウンテンバイク
1981年に、さまざまな表面でオフ-舗装を使用するように設計された、最初の大量生産された-マウンテンバイクが導入されました。 それはすぐに成功し、1980年代には、小売店の棚からの例の急速な削除、ATVの目新しさ、マウンテンバイクやその他の極端なスポーツで周囲から逃げ出したいという都市住民の高まる欲求が彼らの人気を刺激しました。 これらのバイクは、より強力なフレーム、幅の広いタイヤ、トラクションを高めるためのより大きなノブ、より直立した座席位置（視認性と軽量化を向上させるため）、およびフロントとリアのサスペンション設計の多様性を備えています.2000年までに、マウンテンバイクの売上はレースをはるかに上回りました、スポーツ/レーシング、ツーリングバイク。
自転車愛好家にとって、自転車の出現は美しいものの出現であり、幸福の源であり、自転車はどの時代でも私たちに多くの利益をもたらしました。 私たちの移動速度の改善から現在の低炭素移動の追求まで、それは非常に重要です.
