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The new Dura-Ace group boasts a variety of improvements, andthe 10 speed cassette is no exception. Weighing in at just 173 grams (11-23model), it boasts a new surface treatment that increases durability by approximately30%. Thanks to the judicious use of titanium, it’s also one of the lightestcassettes on the market.

Due to the decreased width of the sprockets, this cassettecan be used on older 9 speed Dura-Ace freehubs, as well as the new 10 speedcompatible hubs.