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Shimano Dura-Ace CS-7900 10 Speed Cassette

The Dura-Ace 7900 cassette features an updated tooth design for optimal shifting and minimal friction when used with the 7900 chain. The largest four cogs are made from titanium. A new aluminum carrier contributes to a 10 gram weight savings over the 7800 cassette. As a bonus, Shimano incorporates increases in rigidity in the new carrier.

Improved performance, lighter weight, and increased rigidity are nice accomplishments, but even greater is the wide range of ratio choices--eight to be exact. Flatlanders and time trial specialist can still have their 11-21, but now an 11-25, 11-27, and 11-28 are offered so you can go up and down the hills with ease. The additional cassette ratios are also very handy when used with the new compact crank to provide a wide range of useable gearing for any riding condition. The 7900 cassette is compatible with the 7800 rear derailleur and chain, however, the 11-27 and 11-28 require the 7900 rear derailleur.


  • 163 grams
  • New ratios offered - 8 total
  • Largest 4 cogs are titanium and smaller 6 are steel
  • Improved tooth profile for less friction and better shifting
  • A new aluminum carrier for lighter weight and increased rigidity


  • 11-21: 11-12-13-14-15-16-17-18-19-21
  • 11-23: 11-12-13-14-15-16-17-19-21-23
  • 11-25: 11-12-13-14-15-17-19-21-23-25
  • 11-27: 11-12-13-14-15-17-19-21-24-27
  • 11-28: 11-12-13-14-15-17-19-21-24-28
  • 12-23: 12-13-14-15-16-17-18-19-21-23
  • 12-25: 12-13-14-15-16-17-19-21-23-25
  • 12-27: 12-13-14-15-16-17-19-21-24-27
  • $168.00
    Sale Price
    Reg Price $269.99


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