Save on this one-off 10-speed Dura-Ace cassette that was removed from a new complete bike, and used only for initial set-up, never ridden. Photos are of the actual 11-28 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. An aluminum carrier contributes to a 10 gram weight savings over the 7800 cassette. As a bonus, Shimano dictates increased rigidity in the new carrier.

Improved performance, lighter weight, and increased rigidity are nice accomplishments, as is the improved overall range options of the 7900 cassette. This on-off DEMO is an 11-28, which requires the design of the 5600/6700/7900 rear derailleurs. It is not compatible with the 1st generation 10-speed rear derailleurs (6600/7800).