| 摘要 |
A seatpost assembly is used in combination with a tubular seat mast of a bicycle having a radial hole through an upper rearward wall of the seat mast and includes a cylindrical seatpost sized to telescope within the seat mast and defining a longitudinal slot having side walls forming opposing channels, a lock nut for receiving a bolt and positioned within the slot such that it slidably engages the opposing channels, and a threaded bolt extending through the radial hole and the rearward seat mast wall and into the slot to engage the lock nut. The bolt has a head such that, when the bolt is threaded into the lock nut, a portion of the seatpost and a portion of the seat mast are clamped together between the lock nut and bolt head to prevent movement of the seatpost relative to the seat mast.
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