The Shimano Dura-Ace CS-7900 Bicycle Cassette - 10 Speed features hyperglide sprockets which have a computer designed tooth configuration with contoured shift gates, allowing for smooth shifting even under a heavy load. With close ratio gearing for more efficient energy use through improved cadence control, the largest sprockets are mounted onto a lightweight alloy carrier to enhance rigidity and reduce weight. - L.M.
Please Note: CS-7900 11-27 and 11-28 cassettes require the use of RD-7900 or RD-6700 (rear derailleur)
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Materiale excellent, service perfect. Whit the new expediting system the pack that before was in my hands in max 5 working days tracked now isn't tracket and come to me in between 20gg.
Reasonably hard wearing and fairly light too
The largest three cogs on the new Dura-Ace cassette are supported by a separate cold-forged aluminium alloy carrier, as are the next two sprockets.This increases stiffness and reduces weight â€“ as does the fact that the largest four cogs are made from titanium. All this means that the cassette weighs in at a paltry 185g.Shifting performance up and down is almost always smooth and positive, although sometimes the transitions are so smooth you catch yourself wondering whether it has changed gear at all.
smooth, quiet, light - but expensive. I use this with a Sram groupset (gasp!) but it still shifting perfectly, and it quieter than the top end Sram cassette. Still going strong after a couple thousand miles - we'll see how durable it is in the long run.
Great light cassette for racing. Wide range of gearing options. Smooth & crisp-shifting (with proper chain & RD adjustment of course). Does not wear as well as Ultegra cassette, so I reserve more $$$ DA for races.