EV-CS-7900-2869A
SI-1Z80B
Featuring four titanium cogs, the new Dura-Ace 7900 cogset has further improved shifting quality by creating a more rigid aluminum carrier unit along with a re-engineered tooth profile. Shimano also successfully reduced the weight of the rear wheel assembly by 10 grams.
Technical Documents
Features
- Revised gear sprocket design | Precise & reliable shifting
- 8 cassette combinations | To accommodate more cyclists
- Rigid aluminum carrier | Lightweight & rigid
- Four titanium sprockets | Lightweight
- Weight: 163.2g (11-23T)
- NOTE: CS-7900 11-27 and 11-28 require the use of RD-7900 or RD-6700
Specifications
| Model Number | CS-7900 |
| Series | DURA-ACE |
| Alloy Sprocket Carrier | yes |
| Number of Sprockets | 10-speed |
| Sprocket Material | steel/titanium |
| Sprocket Finish | nickel plated & titanium |
| Chain Compatibility | Super Narrow HG for 10-speed |
| Average Weight | 163g (11-23) |
| Cassette Options | 8 |
| Option 1 | 11-21T |
| Sprocket Sizes | 11-12-13-14-15-16-17-18-19-21 |
| Titanium Sprockets | 17-18-19-21 |
| Option 2 | 11-23T |
| Sprocket Sizes | 11-12-13-14-15-16-17-19-21-23 |
| Titanium Sprockets | 17-19-21-23 |
| Option 3 | 11-25T |
| Sprocket Sizes | 11-12-13-14-15-17-19-21-23-25 |
| Titanium Sprockets | 19-21-23-25 |
| Option 4 | 11-27T |
| Sprocket Sizes | 11-12-13-14-15-17-19-21-24-27 |
| Titanium Sprockets | 19-21-24-27 |
| Option 5 | 11-28T |
| Sprocket Sizes | 11-12-13-14-15-17-19-21-24-28 |
| Titanium Sprockets | 19-21-24-28 |
| Option 6 | 12-23T |
| Sprocket Sizes | 12-13-14-15-16-17-18-19-21-23 |
| Titanium Sprockets | 18-19-21-23 |
| Option 7 | 12-25T |
| Sprocket Sizes | 12-13-14-15-16-17-19-21-23-25 |
| Titanium Sprockets | 19-21-23-25 |
| Option 8 | 12-27T |
| Sprocket Sizes | 12-13-14-15-16-17-19-21-24-27 |
| Titanium Sprockets | 19-21-24-27 |