| 摘要 |
A height adjustment device has a collar 3 for locating around a region of a support tube, such as a steerer tube 2, an elongate extension shaft 1 slidably mounted at the collar 3 to which a handlebar stem (50, figure 4) may be mounted. The extension shaft 1 is slidable via an actuator mechanism that is controlled by a remote trigger, and is capable of axially extending from the support tube 2 and collar 3 to raise the height of the handlebar. The extension shaft 1 may be biased towards one end of its travel by means of a gas spring 10. Also disclosed is a device for adjusting the headset, comprising a turn-down nut 33 threadingly engaged with the collar 3 and adapted to engage the upper headset bearing 32. A castellated outer periphery (37, figure 7) is engaged by a locking pin (35, figure 7) when bearing adjustment is complete.
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