| 摘要 |
<p>A bicycle (1) including a frame, comprising a back section having at least a saddle tube (21), a top saddle fork (23), a bottom chain fork (24), and a front section having at least a crossbar (33) connecting with the back section, a steering head tube (31) and a front fork (32), said frame holding: a front wheel with steering by means of handlebars, a back wheel, a traction system with at least one chain that kinetically connects at least one back freewheel hub (28) with a crankset (26) having cranks and pedals, a brake for each wheel actuated from the handlebars. Said frame can be divided into two parts, a first part including at least the saddle tube (21), the top saddle fork (23) and the bottom chain fork (24) and a second part including at least the steering head tube (31), the fork (32) and the handlebars, said first and second parts of frame being interconnected by means of union devices suited to make them integral.</p> |
