| 摘要 |
A frame assembly for a bicycle having a front wheel and a rear wheel. The frame assembly preferably includes a main frame and a sub-frame, which is movable relative to the main frame and configured to carry the rear wheel. A shock absorber extends between and is connected to the main frame and the sub-frame. The sub-frame may include a support strut configured to support one end of the shock absorber. The main frame includes a down tube and a monolithic bottom bracket support. The monolithic bottom bracket support is connected to a rearward end of the down tube and preferably includes an opening configured to support a pedal crank assembly for rotation about a crank axis. The frame may also include a head tube with an enlarged tube connection area and a variable average wall thickness.
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