Shimano Dura Ace 9000 11 Speed Cassette - Size: 11 - 25 Teeth - male

TheShimano Dura Ace CS-9000 11 Speed Cassetteis an incredibly light-weight and rigid high end road bike cassette that produces incredibly fast, accurate and reliable shifts even in the trickiest of riding conditions! With a rigid Carbon and Alloy carrier the Shimano Dura Ace 9000 Cassette is able to produce even under the most demanding gear changes, and when combined with the Hyperglide EV sprockets which uses contoured shift gates the shifting performance is incredibly smooth even under excessive loads! The 5 largest sprockets on the Cassette are made from titanium, this is to help reduce weight even further without having any sacrifice on the strength of the unit, the weight savings are seen all through unit for example the sprockets have been cut away and drilled to offer light-weight performance without reducing the total rigidity! The close ratio gearing on theShimano Dura Ace CS-9000 11 Speed Cassette means that the rider will experience a much more efficient riding style through finer cadence control! Shimano Dura Ace CS-9000 11 Speed Cassette Features Super lightweight 11-speed HG-EV cassette with a rigid carbon and alloy carrier Hyperglide EV sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load Close ratio gearing allows a more efficient use of energy through finer cadence control Largest sprockets are mounted on lightweight allow and carbon carriers to reduce weight and increase rigidity 5 largest sprockets are mounted on lightweight alloy and carbon carriers to reduce weight and increase rigidity 5 largest sprockets are made from titanium to reduce weight without sacrificing strength Sprockets are extensively cut away and drilled to further reduce weight without reducing rigidity Nickel-played finish offers hard wearing resistance to corrosion Alloy cassette lock ring For Super Narrow 11-speed HG-EV chains Average weight 166 grams for 11-23 tooth