| 摘要 |
An apparatus is disclosed for installing an optional element to a portion of a frame of a bicycle. The apparatus includes an insert formed on the optional element and a socket extending from the portion of the frame of the bicycle in a longitudinal direction of the bicycle. The insert can be inserted into the socket so that the rotation and movement of the insert in the socket is allowed. A quick release is installed on the socket in order to cause the socket to clamp the insert so that the rotation and movement of the insert in the socket is restrained.
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