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Shimano Dura Ace 7900 Cassette
Shifting has been even further improved by creating an even more rigid (and lighter) aluminum carrier unit along with re-engineered teeth profile. Cassette design is lighter as Shimano has developed a super lightweight and rigid aluminum cassette sprocket carrier with the largest four cogs are made of titanium.
Please Note: This is marked an OE Item because it lacks original packaging. The item has never been mounted.