| 摘要 |
PROBLEM TO BE SOLVED: To provide a sprocket assembly of a cycle, comprising plural sprockets, securing various change gear ratios, and improving linearity caused by increasing a diameter of each sprocket.SOLUTION: A sprocket assembly (16) of a rear wheel (57) of a cycle comprises, at least 11 sprockets (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11). The sprocket assembly (16) comprises a whole axial dimension which is 46 mm or shorter, and a distance (M) which is a distance between the sprockets (1, 11) of both ends of the sprocket assembly (16), and is a distance between faces (1a, 11a) facing outside on the sprockets on both ends of the sprocket assembly (16) is 40.5 mm or shorter. An engagement part of the sprocket to be attached to a free wheel body (22) has a length (N) of 39 mm or shorter.SELECTED DRAWING: Figure 2 |
