Shimano Dura-Ace 7700 Ti/Steel 9 Speed Cassette.

Fits all models of Shimano Road 8 and 9 speed hubs. The heat treated, hardened titanium
and steel cogs are precisely machined and carefully finished to provide smooth, responsive
shifting and long lasting beauty. The smallest four cogs are individual ones separated
by spacers. You can easily replace smaller, individual cogs or cog groups that are
bolted to carriers. Cogs on a carrier cannot be easily separated or replaced individually.

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