| 主权项 |
1. A wheel comprising
a rim portion, a center portion for supporting the rim portion, and the rim portion and center portion including a sliding spline and groove arrangement providing relative sliding adjustment of the rim portion and center portion parallel to the wheel's axis of rotation, the wheel having an adjustable offset of the rim portion relative to the center portion along an axis of rotation of the wheel by sliding of the center portion and the rim portion relative to one another parallel to the axis of rotation of the wheel with the center portion within the rim portion, wherein the rim is adapted for attachment of the center portion to a radially inner portion of the rim portion at a selected position of a plurality of available positions disposed around the radially inner portion of the rim portion and in a direction parallel to the axis of rotation of the wheel, and releasable securing means that releasably secure the center portion and the rim together at a selected rim portion to center portion axial offset, the securing means received into the rim portion from the radially inner portion thereof. |
