| 摘要 |
A multi-functional bicycle frame, comprising a length adjustable cross bar that is pivotable about a rear wheel axle, where a crankset spindle is rotatably mounted on a mounting plate downwardly extending from the cross bar! a height adjustable sleeve connected to an end of a down tube which is fixedly connected to the cross bar, the sleeve being displaceable along a steerer tube of a bicycle fork; and a telescopingly extendable seat tube which is pivotably connected to an articulator unit mounted on top of the cross bar at one end thereof closest to a front wheel and which is angularly displaceable about a horizontal pivot axis of the articulator unit, wherein the cross bar and the seat tube are independently pivotable and are independently extendable and retractable to achieve a customizable frame geometry by which the distance between the rear wheel axle and crankset spindle is fixed, a seat connected to the seat tube remains at a substantially horizontal disposition and is spaced from the crankset spindle by a desired dimension, and a foot of a rider is able to be outstretched onto a corresponding pedal connected to the crankset spindle during a pedaling operation. |
