| 摘要 |
A roller structure for supporting a boat on a trailer bed and having a pair of annular hubs in the form of a funnel-like insert member to mount the roller. Each insert member has an inner shaft engaging section and an outer roller engaging sections whereby the sections are axially offset from one another relative to the axis of rotation of the roller. The pair of insert members are snugged against the roller for support thereof in either of two alternative mirror image configurations. In one configuration the inner section pof the insert members are spaced apart and are remote of one another and the roller provides for generally non-gimbaling rotation on a supporting shaft. In the other configuration the inner sections are adjacent and substantially in abutment, and the roller achieves a gimbaling rotation on the shaft.
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