- 前變速有力、準確、流暢
- 自動調整功能可對導板進行程式化控制
- SHIMANO SYNCHRONIZED SHIFT
- 手動、完全和半同步變速程式
- 高位齒片齒數：50-52T
Official Specifications
| Series | DURA-ACE |
| Model no. | FD-R9250 |
| Color | Series color |
| Front speeds | 2 |
| Rear speeds | 12 |
| Compatible chain | HG 12-speed |
| Action | TOP SWING |
| Down swing | ✔ |
| Brazed-on | ✔ |
| Chain line (mm) | 44.5 |
| Chainstay angle (deg.) | 61-66 |
| Top gear teeth | 46-54T |
| Total capacity | 16T |
| Link bushings | 4 |
| Rear clamp band, base bracket Material | Aluminum |
| Rear clamp band, base bracket Finish | Painted |
| Outer link Material | Aluminum |
| Outer link Finish | Anodized |
| Inner link Material | Steel |
| Inner link Finish | Plated |
| Chain guide Material | Aluminum |
| Chain guide Finish | Plated |
| Firmware update by E-TUBE PROJECT | ✔ |
| SD50 port (pcs) | 0 |
| SD300 port (pcs) | 1 |
| SD50 connector (pcs) | 0 |
| SD300 connector (pcs) | 0 |
| Average weight (g) (band type: L size, direct type w/ screw) | 96 |