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  • Shimano Dura-Ace CS-7900 10-Speed Cassette - CS-7900 12-25
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Shimano CS-7900 Dura Ace Cassette

by Shimano

Price: $173.49 - $374.99
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  • Hyperglide (HG) sprockets - improved shifting
  • Titanium sprockets receive a superior surface treatment to increase durability by approximately 30%
  • Updated design on the cogs for better shifting performance for more robust shifting, weight savings
  • Use with Super Narrow Chain for 10-speed
  • It weighs 163 grams

Frequently Bought Together

Shimano CS-7900 Dura Ace Cassette + Shimano CN-7801 Dura Ace Bicycle Chain (10-Speed, 116L, Silver)
Price for both: $256.35

These items are shipped from and sold by different sellers.

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Product Description

The Shimano Dura-Ace CS-7900 cassette provides you with a wealth of gearing options unlike any previous generation of Dura-Ace. You get an unprecedented 8 different ratios to choose from -- 11-21, 11-23, 11-25, 11-27, 11-28, 12-23, 12-25, and 12-27. The low 6 cogs are steel, and the high 4 cogs are made from titanium. Compared to the CS-7800 cassette, you get a weight savings of 10g (e.g. the 11-23 weighs 166g). The backbone of the Dura-Ace CS-7900 cassette is its new aluminum carrier unit. Not only is it lighter than the CS-7800's, but it offers a measurable increase in rigidity for improved power transfer when you're putting the hammer down. In addition, Shimano did some re-engineering to the cog teeth profiles. They're fine-tuned to mate to the Dura-Ace CN-7900 chain -- giving you superior shifting on both up-shifts and down-shifts. You'll also experience added drivetrain efficiency since the inner plates of the CN-7900 precisely fit the cog teeth of the CS-7900 cassette. Lighter, stiffer, crisper -- you get improvements all around.The Shimano Dura-Ace CS-7900 Cassette is compatible with the Dura-Ace RD-7900 rear derailleur and the RD-7800 rear derailleur except for 11-27 and 11-28 . The RD-7800 rear derailleur does not have ample chain wrap capacity to handle the CS-7900 in 11-27 and 11-28. These cassettes must be used with the RD-7900. The CS-7900 is optimized for the Dura-Ace CN-7900 chain, but it is compatible with the Dura-Ace CN-7801 chain.Two brand-new ratios for Shimano with the Dura-Ace CS-7900 cassette are 11-25 and 11-28. The 11-21 includes - 11,12,13,14,15,16,17,18,19,21The 11-23 includes - 11,12,13,14,15,16,17,19,21,23The 11-25 includes - 11,12,13,14,15,17,19,21,23,25The 11-27 includes - 11,12,13,14,15,17,19,21,24,27The 11-28 includes - 11,12,13,14,15,17,19,21,24,28The 12-23 includes - 12,13,14,15,16,17,18,19,21,23The 12-25 includes - 12,13,14,15,16,17,19,21,23,25The 12-27 includes - 12,13,14,15,16,17,19,21,24,27

Product Details

  • Shipping Weight: 9 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B003938XMW
  • Average Customer Review: 4.8 out of 5 stars  See all reviews (5 customer reviews)
  • Amazon Best Sellers Rank: #123,529 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • Product Warranty: For warranty information about this product, please click here

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Customer Reviews

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Most Helpful Customer Reviews

By Victor Turner on September 13, 2014
Size: 10 Speed 12-25Color: Grey
Very light and efficient.
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0 of 1 people found the following review helpful By AR1181 on December 16, 2013
Size: 11/27TColor: Silver Verified Purchase
Best casset. Good price compared to my local bike shop for Dura Ace. Great set for long climbs and steep ascents.
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0 of 1 people found the following review helpful By William on August 24, 2014
Size: 11/27TColor: Silver Verified Purchase
Shimano is shimano. Excellent product.
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1 of 3 people found the following review helpful By alberto ochoa on February 14, 2013
Size: 12/27TColor: Silver Verified Purchase
The cogs were better than i expected because was lighter (less weight) than i imagine and stronger than i expected.
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1 of 5 people found the following review helpful By KP on November 17, 2012
Size: 11/27TColor: Silver Verified Purchase
All rounder and climbs well. The 11 works well on the flat and the gearing is quite smooth. If you are training and racing in hills and rolling terrain this works well.
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