| 摘要 |
Crank arm spider improvement for attaching at least one ovoid chainring (3), comprising a spider (1), forming a structure with multiple spider anchorage points (10) distributed in a star like shape along a perimeter corresponding to a spider bolt circle diameter, and mechanical anchorage means (5) in order to make integral said chainring (3) with the corresponding crank arm (2). Being the number of said spider anchorage points (10) multiple of the number of said mechanical anchorage means (5), the present invention enables the user to choose between different orientations of the ovoid chainring (3). |
