| 摘要 |
A bicycle rim includes a first annular side wall, a second annular side wall and an annular bridge extending between the first and second annular side walls. The annular bridge has an annular tire support surface extending between the first and second annular sidewalls. The annular tire support surface has a first projection. The first projection has at least one first portion and at least one second portion. The second portion has a different size from the first portion. |
