| 摘要 |
<p>The bicycle frame, particularly of speed driving bicycles for downhill off-road driving according to the invention is made in such a way that upon greater loads on the rear wheel it provides an increased direction stability, while during lower loads it provides adequate agility. Such needs arise particularly during off-road downhill rides, where the tracks consist of even steep sections and sharp turns. The bicycle frame (1) with rear spring fork (2) according to the invention is made from any front fork head (3), sub-seat pipe (4) and at least one section (5), which links the head (3) and the sub-seat pipe (4), while the driving bearing (9) is applied to the frame (1) or the rear fork (2). The rear fork (2) is made from at least one pair of ends (7), which are terminated with elements including the rear-wheel seat and which are rotatingly fitted at least once to the frame (1) in such a way, that when turning the ends (7) up towards the top of the sub-seat pipe (4) the element with the rear-wheel seat moves away from the driving bearing (9).</p> |
