Shimano Dura Ace CS-R9100 11 Speed Cassette, 12-25T

\n\t\t\tCS-R9100 Dura-Ace 11-speed cassette 12 - 25T

\n\t\t\tDura-Ace 9100 adds subtle, careful improvements to an already sophisticated range of moving pieces. The cassette introduces new gearing variations, including extended gearing choices for rouleurs and climbers who want the best of both worlds. It is a Genuine Shimano replacement part.

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\n\t\t\tTechnologies

\n\t\t\tHG-EV - The HG-EV Bike cassette sprocket is designed for rider-tuned gear combinations and cadence control. Shimano offers an optimal 11-speed drivetrain gear ratio; you can choose from a variety of wider and closer gear combinations to fit different riding disciplines. 11-speed gear is obtained with the HG-EV cassette sprocket without compromising 10-speed durability or improved HyperGlide shifting.

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• \n\t\t\t\tSuper lightweight 11-speed HG-EV cassette with a rigid carbon and alloy carrier for excellent shifting even under the most demanding gear changes
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• \n\t\t\t\tHyperglide EV sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load
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• \n\t\t\t\tClose ratio gearing allows a more efficient use of energy through finer cadence control
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• \n\t\t\t\tLargest sprockets are mounted on lightweight alloy and carbon carriers to reduce weight and increase rigidity
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• \n\t\t\t\t5 largest sprockets are made from titanium to reduce weight without sacrificing strength
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• \n\t\t\t\tSprockets are extensively cut away and drilled to further reduce weight without reducing rigidity
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• \n\t\t\t\tNickel-plated finish offers hard wearing resistance to corrosion
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• \n\t\t\t\tAlloy cassette lockring
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• \n\t\t\t\tFor Super Narrow 11-speed HG-EV chains
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• \n\t\t\t\tAverage weight 175 grams for 11-25 tooth
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• \n\t\t\t\tWider gear combination: 11-28T/12-28T/11-30T (new gear combination)
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• \n\t\t\t\tCloser gear combination: 11-25T/12-25T
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• \n\t\t\t\tGear combination: 11-25T, 11-28T, 11-30T (new gear combination), 12-25T, 12-28T
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